- 19 7月, 2019 4 次提交
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由 David Hildenbrand 提交于
Let's factor out removing of memory block devices, which is only necessary for memory added via add_memory() and friends that created memory block devices. Remove the devices before calling arch_remove_memory(). This finishes factoring out memory block device handling from arch_add_memory() and arch_remove_memory(). Link: http://lkml.kernel.org/r/20190527111152.16324-10-david@redhat.comSigned-off-by: NDavid Hildenbrand <david@redhat.com> Reviewed-by: NDan Williams <dan.j.williams@intel.com> Acked-by: NMichal Hocko <mhocko@suse.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: David Hildenbrand <david@redhat.com> Cc: "mike.travis@hpe.com" <mike.travis@hpe.com> Cc: Andrew Banman <andrew.banman@hpe.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Mark Brown <broonie@kernel.org> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Oscar Salvador <osalvador@suse.de> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Arun KS <arunks@codeaurora.org> Cc: Mathieu Malaterre <malat@debian.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Baoquan He <bhe@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chintan Pandya <cpandya@codeaurora.org> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Jun Yao <yaojun8558363@gmail.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Logan Gunthorpe <logang@deltatee.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Oscar Salvador <osalvador@suse.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Qian Cai <cai@lca.pw> Cc: Rich Felker <dalias@libc.org> Cc: Rob Herring <robh@kernel.org> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Yu Zhao <yuzhao@google.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 David Hildenbrand 提交于
Only memory to be added to the buddy and to be onlined/offlined by user space using /sys/devices/system/memory/... needs (and should have!) memory block devices. Factor out creation of memory block devices. Create all devices after arch_add_memory() succeeded. We can later drop the want_memblock parameter, because it is now effectively stale. Only after memory block devices have been added, memory can be onlined by user space. This implies, that memory is not visible to user space at all before arch_add_memory() succeeded. While at it - use WARN_ON_ONCE instead of BUG_ON in moved unregister_memory() - introduce find_memory_block_by_id() to search via block id - Use find_memory_block_by_id() in init_memory_block() to catch duplicates Link: http://lkml.kernel.org/r/20190527111152.16324-8-david@redhat.comSigned-off-by: NDavid Hildenbrand <david@redhat.com> Reviewed-by: NPavel Tatashin <pasha.tatashin@soleen.com> Acked-by: NMichal Hocko <mhocko@suse.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: David Hildenbrand <david@redhat.com> Cc: "mike.travis@hpe.com" <mike.travis@hpe.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Andrew Banman <andrew.banman@hpe.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Qian Cai <cai@lca.pw> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Arun KS <arunks@codeaurora.org> Cc: Mathieu Malaterre <malat@debian.org> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Baoquan He <bhe@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chintan Pandya <cpandya@codeaurora.org> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Jun Yao <yaojun8558363@gmail.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Logan Gunthorpe <logang@deltatee.com> Cc: Mark Brown <broonie@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Oscar Salvador <osalvador@suse.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rich Felker <dalias@libc.org> Cc: Rob Herring <robh@kernel.org> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Yu Zhao <yuzhao@google.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 David Hildenbrand 提交于
We want to improve error handling while adding memory by allowing to use arch_remove_memory() and __remove_pages() even if CONFIG_MEMORY_HOTREMOVE is not set to e.g., implement something like: arch_add_memory() rc = do_something(); if (rc) { arch_remove_memory(); } We won't get rid of CONFIG_MEMORY_HOTREMOVE for now, as it will require quite some dependencies for memory offlining. Link: http://lkml.kernel.org/r/20190527111152.16324-7-david@redhat.comSigned-off-by: NDavid Hildenbrand <david@redhat.com> Reviewed-by: NPavel Tatashin <pasha.tatashin@soleen.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Michal Hocko <mhocko@suse.com> Cc: David Hildenbrand <david@redhat.com> Cc: Oscar Salvador <osalvador@suse.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Mark Brown <broonie@kernel.org> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Rob Herring <robh@kernel.org> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: "mike.travis@hpe.com" <mike.travis@hpe.com> Cc: Andrew Banman <andrew.banman@hpe.com> Cc: Arun KS <arunks@codeaurora.org> Cc: Qian Cai <cai@lca.pw> Cc: Mathieu Malaterre <malat@debian.org> Cc: Baoquan He <bhe@redhat.com> Cc: Logan Gunthorpe <logang@deltatee.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chintan Pandya <cpandya@codeaurora.org> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Jun Yao <yaojun8558363@gmail.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Yu Zhao <yuzhao@google.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 David Hildenbrand 提交于
We'll rework hotplug_memory_register() shortly, so it no longer consumes pass a section. [cai@lca.pw: fix a compilation warning] Link: http://lkml.kernel.org/r/1559320186-28337-1-git-send-email-cai@lca.pw Link: http://lkml.kernel.org/r/20190527111152.16324-6-david@redhat.comSigned-off-by: NDavid Hildenbrand <david@redhat.com> Signed-off-by: NQian Cai <cai@lca.pw> Acked-by: NMichal Hocko <mhocko@suse.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: Andrew Banman <andrew.banman@hpe.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Arun KS <arunks@codeaurora.org> Cc: Baoquan He <bhe@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chintan Pandya <cpandya@codeaurora.org> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Jun Yao <yaojun8558363@gmail.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Logan Gunthorpe <logang@deltatee.com> Cc: Mark Brown <broonie@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Mathieu Malaterre <malat@debian.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: "mike.travis@hpe.com" <mike.travis@hpe.com> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Oscar Salvador <osalvador@suse.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rich Felker <dalias@libc.org> Cc: Rob Herring <robh@kernel.org> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Yu Zhao <yuzhao@google.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 18 7月, 2019 5 次提交
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由 Denis Efremov 提交于
This fixes a global out-of-bounds read access in the copy_buffer function of the floppy driver. The FDDEFPRM ioctl allows one to set the geometry of a disk. The sect and head fields (unsigned int) of the floppy_drive structure are used to compute the max_sector (int) in the make_raw_rw_request function. It is possible to overflow the max_sector. Next, max_sector is passed to the copy_buffer function and used in one of the memcpy calls. An unprivileged user could trigger the bug if the device is accessible, but requires a floppy disk to be inserted. The patch adds the check for the .sect * .head multiplication for not overflowing in the set_geometry function. The bug was found by syzkaller. Signed-off-by: NDenis Efremov <efremov@ispras.ru> Tested-by: NWilly Tarreau <w@1wt.eu> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Denis Efremov 提交于
This fixes the invalid pointer dereference in the drive_name function of the floppy driver. The native_format field of the struct floppy_drive_params is used as floppy_type array index in the drive_name function. Thus, the field should be checked the same way as the autodetect field. To trigger the bug, one could use a value out of range and set the drive parameters with the FDSETDRVPRM ioctl. Next, FDGETDRVTYP ioctl should be used to call the drive_name. A floppy disk is not required to be inserted. CAP_SYS_ADMIN is required to call FDSETDRVPRM. The patch adds the check for a value of the native_format field to be in the '0 <= x < ARRAY_SIZE(floppy_type)' range of the floppy_type array indices. The bug was found by syzkaller. Signed-off-by: NDenis Efremov <efremov@ispras.ru> Tested-by: NWilly Tarreau <w@1wt.eu> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Denis Efremov 提交于
This fixes a global out-of-bounds read access in the next_valid_format function of the floppy driver. The values from autodetect field of the struct floppy_drive_params are used as indices for the floppy_type array in the next_valid_format function 'floppy_type[DP->autodetect[probed_format]].sect'. To trigger the bug, one could use a value out of range and set the drive parameters with the FDSETDRVPRM ioctl. A floppy disk is not required to be inserted. CAP_SYS_ADMIN is required to call FDSETDRVPRM. The patch adds the check for values of the autodetect field to be in the '0 <= x < ARRAY_SIZE(floppy_type)' range of the floppy_type array indices. The bug was found by syzkaller. Signed-off-by: NDenis Efremov <efremov@ispras.ru> Tested-by: NWilly Tarreau <w@1wt.eu> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Denis Efremov 提交于
This fixes a divide by zero error in the setup_format_params function of the floppy driver. Two consecutive ioctls can trigger the bug: The first one should set the drive geometry with such .sect and .rate values for the F_SECT_PER_TRACK to become zero. Next, the floppy format operation should be called. A floppy disk is not required to be inserted. An unprivileged user could trigger the bug if the device is accessible. The patch checks F_SECT_PER_TRACK for a non-zero value in the set_geometry function. The proper check should involve a reasonable upper limit for the .sect and .rate fields, but it could change the UAPI. The patch also checks F_SECT_PER_TRACK in the setup_format_params, and cancels the formatting operation in case of zero. The bug was found by syzkaller. Signed-off-by: NDenis Efremov <efremov@ispras.ru> Tested-by: NWilly Tarreau <w@1wt.eu> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Daniel Drake 提交于
The Asus WMI spec indicates that the function being controlled here is called "Fan Boost Mode". The user-facing documentation also calls it this. The spec uses the term "fan mode" is used to refer to other things, including functionality expected to appear on future products. We missed this before as we are not dealing with the most readable of specs, and didn't forsee any confusion around shortening the name. Rename "fan mode" to "fan boost mode" to improve consistency with the spec and to avoid a future naming conflict. There is no interface breakage here since this has yet to be included in an official kernel release. I also updated the kernel version listed under ABI accordingly. Signed-off-by: NDaniel Drake <drake@endlessm.com> Acked-by: NYurii Pavlovskyi <yurii.pavlovskyi@gmail.com> Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
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- 17 7月, 2019 6 次提交
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由 Daniel Jordan 提交于
locked_vm accounting is done roughly the same way in five places, so unify them in a helper. Include the helper's caller in the debug print to distinguish between callsites. Error codes stay the same, so user-visible behavior does too. The one exception is that the -EPERM case in tce_account_locked_vm is removed because Alexey has never seen it triggered. [daniel.m.jordan@oracle.com: v3] Link: http://lkml.kernel.org/r/20190529205019.20927-1-daniel.m.jordan@oracle.com [sfr@canb.auug.org.au: fix mm/util.c] Link: http://lkml.kernel.org/r/20190524175045.26897-1-daniel.m.jordan@oracle.comSigned-off-by: NDaniel Jordan <daniel.m.jordan@oracle.com> Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au> Tested-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Acked-by: NAlex Williamson <alex.williamson@redhat.com> Cc: Alan Tull <atull@kernel.org> Cc: Alex Williamson <alex.williamson@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Christoph Lameter <cl@linux.com> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Jason Gunthorpe <jgg@mellanox.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Moritz Fischer <mdf@kernel.org> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Steve Sistare <steven.sistare@oracle.com> Cc: Wu Hao <hao.wu@intel.com> Cc: Ira Weiny <ira.weiny@intel.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Pavel Tatashin 提交于
It is now allowed to use persistent memory like a regular RAM, but currently there is no way to remove this memory until machine is rebooted. This work expands the functionality to also allows hotremoving previously hotplugged persistent memory, and recover the device for use for other purposes. To hotremove persistent memory, the management software must first offline all memory blocks of dax region, and than unbind it from device-dax/kmem driver. So, operations should look like this: echo offline > /sys/devices/system/memory/memoryN/state ... echo dax0.0 > /sys/bus/dax/drivers/kmem/unbind Note: if unbind is done without offlining memory beforehand, it won't be possible to do dax0.0 hotremove, and dax's memory is going to be part of System RAM until reboot. Link: http://lkml.kernel.org/r/20190517215438.6487-4-pasha.tatashin@soleen.comSigned-off-by: NPavel Tatashin <pasha.tatashin@soleen.com> Reviewed-by: NDavid Hildenbrand <david@redhat.com> Cc: James Morris <jmorris@namei.org> Cc: Sasha Levin <sashal@kernel.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Keith Busch <keith.busch@intel.com> Cc: Vishal Verma <vishal.l.verma@intel.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Ross Zwisler <zwisler@kernel.org> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Fengguang Wu <fengguang.wu@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Yaowei Bai <baiyaowei@cmss.chinamobile.com> Cc: Takashi Iwai <tiwai@suse.de> Cc: Jérôme Glisse <jglisse@redhat.com> Cc: Dave Hansen <dave.hansen@intel.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Pavel Tatashin 提交于
Patch series ""Hotremove" persistent memory", v6. Recently, adding a persistent memory to be used like a regular RAM was added to Linux. This work extends this functionality to also allow hot removing persistent memory. We (Microsoft) have an important use case for this functionality. The requirement is for physical machines with small amount of RAM (~8G) to be able to reboot in a very short period of time (<1s). Yet, there is a userland state that is expensive to recreate (~2G). The solution is to boot machines with 2G preserved for persistent memory. Copy the state, and hotadd the persistent memory so machine still has all 8G available for runtime. Before reboot, offline and hotremove device-dax 2G, copy the memory that is needed to be preserved to pmem0 device, and reboot. The series of operations look like this: 1. After boot restore /dev/pmem0 to ramdisk to be consumed by apps. and free ramdisk. 2. Convert raw pmem0 to devdax ndctl create-namespace --mode devdax --map mem -e namespace0.0 -f 3. Hotadd to System RAM echo dax0.0 > /sys/bus/dax/drivers/device_dax/unbind echo dax0.0 > /sys/bus/dax/drivers/kmem/new_id echo online_movable > /sys/devices/system/memoryXXX/state 4. Before reboot hotremove device-dax memory from System RAM echo offline > /sys/devices/system/memoryXXX/state echo dax0.0 > /sys/bus/dax/drivers/kmem/unbind 5. Create raw pmem0 device ndctl create-namespace --mode raw -e namespace0.0 -f 6. Copy the state that was stored by apps to ramdisk to pmem device 7. Do kexec reboot or reboot through firmware if firmware does not zero memory in pmem0 region (These machines have only regular volatile memory). So to have pmem0 device either memmap kernel parameter is used, or devices nodes in dtb are specified. This patch (of 3): When add_memory() fails, the resource and the memory should be freed. Link: http://lkml.kernel.org/r/20190517215438.6487-2-pasha.tatashin@soleen.com Fixes: c221c0b0 ("device-dax: "Hotplug" persistent memory for use like normal RAM") Signed-off-by: NPavel Tatashin <pasha.tatashin@soleen.com> Reviewed-by: NDave Hansen <dave.hansen@intel.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Borislav Petkov <bp@suse.de> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: David Hildenbrand <david@redhat.com> Cc: Fengguang Wu <fengguang.wu@intel.com> Cc: Huang Ying <ying.huang@intel.com> Cc: James Morris <jmorris@namei.org> Cc: Jérôme Glisse <jglisse@redhat.com> Cc: Keith Busch <keith.busch@intel.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Ross Zwisler <zwisler@kernel.org> Cc: Sasha Levin <sashal@kernel.org> Cc: Takashi Iwai <tiwai@suse.de> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Vishal Verma <vishal.l.verma@intel.com> Cc: Yaowei Bai <baiyaowei@cmss.chinamobile.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Miroslav Lichvar 提交于
The PPS assert/clear offset corrections are set by the PPS_SETPARAMS ioctl in the pps_ktime structs, which also contain flags. The flags are not initialized by applications (using the timepps.h header) and they are not used by the kernel for anything except returning them back in the PPS_GETPARAMS ioctl. Set the flags to zero to make it clear they are unused and avoid leaking uninitialized data of the PPS_SETPARAMS caller to other applications that have a read access to the PPS device. Link: http://lkml.kernel.org/r/20190702092251.24303-1-mlichvar@redhat.comSigned-off-by: NMiroslav Lichvar <mlichvar@redhat.com> Reviewed-by: NThomas Gleixner <tglx@linutronix.de> Acked-by: NRodolfo Giometti <giometti@enneenne.com> Cc: Greg KH <greg@kroah.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Dan Carpenter 提交于
The dev_info.name[] array has space for RIO_MAX_DEVNAME_SZ + 1 characters. But the problem here is that we don't ensure that the user put a NUL terminator on the end of the string. It could lead to an out of bounds read. Link: http://lkml.kernel.org/r/20190529110601.GB19119@mwanda Fixes: e8de3701 ("rapidio: add mport char device driver") Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com> Acked-by: NAlexandre Bounine <alex.bou9@gmail.com> Cc: Ira Weiny <ira.weiny@intel.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Weitao Hou 提交于
fix lenght to length Link: http://lkml.kernel.org/r/20190521050937.4370-1-houweitaoo@gmail.comSigned-off-by: NWeitao Hou <houweitaoo@gmail.com> Acked-by: NKees Cook <keescook@chromium.org> Cc: Colin Ian King <colin.king@canonical.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 16 7月, 2019 4 次提交
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由 Hans de Goede 提交于
Some machines change the brightness themselves when a brightness hotkey gets pressed, despite us telling them not to. This causes the brightness to go two steps up / down when the hotkey is pressed. This is esp. a problem on older machines with only a few brightness levels. This commit adds a new hw_changes_brightness quirk which makes acpi_video_device_notify() only call backlight_force_update(..., BACKLIGHT_UPDATE_HOTKEY) and not do anything else, notifying userspace that the brightness was changed and leaving it at that fixing the dual step problem. BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=204077Reported-by: NKacper Piwiński <cosiekvfj@o2.pl> Tested-by: NKacper Piwiński <cosiekvfj@o2.pl> Signed-off-by: NHans de Goede <hdegoede@redhat.com> Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
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由 Linus Walleij 提交于
This reverts commit fbbf145a. It seems I was misguided in my fixup, which was working at the time but did not work on the final v5.2. The patch tried to avoid a quirk the gpiolib code not to treat "spi-gpio" CS gpios "special" by enforcing them to be active low, in the belief that since the "spi-gpio" driver was parsing the device tree on its own, it did not care to inspect the "spi-cs-high" attribute on the device nodes. That's wrong. The SPI core was inspecting them inside the of_spi_parse_dt() funtion and setting SPI_CS_HIGH on the nodes, and the driver inspected this flag when driving the line. As of now, the core handles the GPIO and it will consistently set the GPIO descriptor to 1 to enable CS, strictly requireing the gpiolib to invert it. And the gpiolib should indeed enforce active low on the CS line. Device trees should of course put the right flag on the GPIO handles, but it used to not matter. If we don't enforce active low on "gpio-gpio" we may run into ABI backward compatibility issues, so revert this. Cc: linux-spi@vger.kernel.org Cc: stable@vger.kernel.org Signed-off-by: NLinus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20190715204529.9539-1-linus.walleij@linaro.org
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由 Viresh Kumar 提交于
It always returns 0 (success) and its return type should really be void. Over that, many drivers have added error handling code based on its return value, which is not required at all. Change its return type to void and update all the callers. Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org> Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
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git://people.freedesktop.org/~thomash/linux由 Dave Airlie 提交于
This reverts commit 031e610a, reversing changes made to 52d2d44e. The mm changes in there we premature and not fully ack or reviewed by core mm folks, I dropped the ball by merging them via this tree, so lets take em all back out. Signed-off-by: NDave Airlie <airlied@redhat.com>
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- 15 7月, 2019 21 次提交
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由 Mauro Carvalho Chehab 提交于
The contents of this directory is mostly driver-api stuff. Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
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由 Mauro Carvalho Chehab 提交于
There are lots of documents under Documentation/*.txt and a few other orphan documents elsehwere that belong to the driver-API book. Move them to their right place. Reviewed-by: Cornelia Huck <cohuck@redhat.com> # vfio-related parts Acked-by: Logan Gunthorpe <logang@deltatee.com> # switchtec Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
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由 Mauro Carvalho Chehab 提交于
There are lots of documents that belong to the admin-guide but are on random places (most under Documentation root dir). Move them to the admin guide. Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org> Acked-by: NAlexandre Belloni <alexandre.belloni@bootlin.com> Acked-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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由 Mauro Carvalho Chehab 提交于
The audience for the Kernel driver-model is clearly Kernel hackers. Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org> Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> # ice driver changes
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由 Mauro Carvalho Chehab 提交于
The blockdev book basically contains user-faced documentation. Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
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由 Mauro Carvalho Chehab 提交于
The docs under Documentation/laptops contain users specific information. Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org> Acked-by: NAndy Shevchenko <andy.shevchenko@gmail.com>
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由 Mauro Carvalho Chehab 提交于
The DM support describes lots of aspects related to mapped disk partitions from the userspace PoV. Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
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由 Mauro Carvalho Chehab 提交于
While I was tempted to move it to admin-guide, as some docs there are more userspace-faced, there are some very technical discussions about memory error correction code from the Kernel implementer's PoV. So, let's place it inside the driver-api book. Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
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由 Mauro Carvalho Chehab 提交于
The descriptions here are from Kernel driver's PoV. Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org> Acked-by: NDan Williams <dan.j.williams@intel.com>
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由 Mauro Carvalho Chehab 提交于
The perf infrastructure is used for userspace to track issues. At least a good part of what's described here is related to it. So, add it to the admin-guide. Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
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由 Mauro Carvalho Chehab 提交于
This is actually a subsystem description, with contains both kAPI and uAPI. While it should ideally be slplit, let's place it at driver-api, as most things are related to kAPI and driver-specific info. Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
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由 Mauro Carvalho Chehab 提交于
Rename the perf documentation files to ReST, add an index for them and adjust in order to produce a nice html output via the Sphinx build system. At its new index.rst, let's add a :orphan: while this is not linked to the main index.rst file, in order to avoid build warnings. Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
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由 Mauro Carvalho Chehab 提交于
Rename the blockdev documentation files to ReST, add an index for them and adjust in order to produce a nice html output via the Sphinx build system. The drbd sub-directory contains some graphs and data flows. Add those too to the documentation. At its new index.rst, let's add a :orphan: while this is not linked to the main index.rst file, in order to avoid build warnings. Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
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由 Mauro Carvalho Chehab 提交于
Rename the rapidio documentation files to ReST, add an index for them and adjust in order to produce a nice html output via the Sphinx build system. At its new index.rst, let's add a :orphan: while this is not linked to the main index.rst file, in order to avoid build warnings. Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
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由 Mauro Carvalho Chehab 提交于
Rename the iio documentation files to ReST, add an index for them and adjust in order to produce a nice html output via the Sphinx build system. The cdrom.txt and hdio.txt have their own particular syntax. In order to speedup the conversion, I used a small ancillary perl script: my $d; $d .= $_ while(<>); $d =~ s/(\nCDROM\S+)\s+(\w[^\n]*)/$1\n\t$2\n/g; $d =~ s/(\nHDIO\S+)\s+(\w[^\n]*)/$1\n\t$2\n/g; $d =~ s/(\n\s*usage:)[\s\n]*(\w[^\n]*)/$1:\n\n\t $2\n/g; $d =~ s/(\n\s*)(E\w+[\s\n]*\w[^\n]*)/$1- $2/g; $d =~ s/(\n\s*)(inputs|outputs|notes):\s*(\w[^\n]*)/$1$2:\n\t\t$3\n/g; print $d; It basically add blank lines on a few interesting places. The script is not perfect: still several things require manual work, but it saved quite some time doing some obvious stuff. At its new index.rst, let's add a :orphan: while this is not linked to the main index.rst file, in order to avoid build warnings. Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
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由 Mauro Carvalho Chehab 提交于
Rename the nvdimm documentation files to ReST, add an index for them and adjust in order to produce a nice html output via the Sphinx build system. At its new index.rst, let's add a :orphan: while this is not linked to the main index.rst file, in order to avoid build warnings. Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org> Acked-by: NDan Williams <dan.j.williams@intel.com>
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由 Mauro Carvalho Chehab 提交于
Rename the mtd documentation files to ReST, add an index for them and adjust in order to produce a nice html output via the Sphinx build system. It should be noticed that Sphinx doesn't handle very well URLs with dots in the middle. Thankfully, internally, the '.' char is translated to %2E, so we can jus use %2E instead of dots, and this will work fine on both text and processed files. At its new index.rst, let's add a :orphan: while this is not linked to the main index.rst file, in order to avoid build warnings. Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
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由 Mauro Carvalho Chehab 提交于
Rename the laptops documentation files to ReST, add an index for them and adjust in order to produce a nice html output via the Sphinx build system. At its new index.rst, let's add a :orphan: while this is not linked to the main index.rst file, in order to avoid build warnings. Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org> Acked-by: NAndy Shevchenko <andy.shevchenko@gmail.com>
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由 Mauro Carvalho Chehab 提交于
Converts ARM the text files to ReST, preparing them to be an architecture book. The conversion is actually: - add blank lines and identation in order to identify paragraphs; - fix tables markups; - add some lists markups; - mark literal blocks; - adjust title markups. At its new index.rst, let's add a :orphan: while this is not linked to the main index.rst file, in order to avoid build warnings. Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org> Reviewed-by Corentin Labbe <clabbe.montjoie@gmail.com> # For sun4i-ss
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由 Mauro Carvalho Chehab 提交于
Convert this small file to ReST in preparation for adding it to the driver-api book. While this is not part of the driver-api book, mark it as :orphan:, in order to avoid build warnings. Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org> Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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由 Mauro Carvalho Chehab 提交于
As it has some function definitions, move them to connector.h. The remaining conversion is actually: - add blank lines and identation in order to identify paragraphs; - fix tables markups; - add some lists markups; - mark literal blocks; - adjust title markups. At its new index.rst, let's add a :orphan: while this is not linked to the main index.rst file, in order to avoid build warnings. Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
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