1. 30 8月, 2014 1 次提交
    • H
      x86,mm: fix pte_special versus pte_numa · b38af472
      Hugh Dickins 提交于
      Sasha Levin has shown oopses on ffffea0003480048 and ffffea0003480008 at
      mm/memory.c:1132, running Trinity on different 3.16-rc-next kernels:
      where zap_pte_range() checks page->mapping to see if PageAnon(page).
      
      Those addresses fit struct pages for pfns d2001 and d2000, and in each
      dump a register or a stack slot showed d2001730 or d2000730: pte flags
      0x730 are PCD ACCESSED PROTNONE SPECIAL IOMAP; and Sasha's e820 map has
      a hole between cfffffff and 100000000, which would need special access.
      
      Commit c46a7c81 ("x86: define _PAGE_NUMA by reusing software bits on
      the PMD and PTE levels") has broken vm_normal_page(): a PROTNONE SPECIAL
      pte no longer passes the pte_special() test, so zap_pte_range() goes on
      to try to access a non-existent struct page.
      
      Fix this by refining pte_special() (SPECIAL with PRESENT or PROTNONE) to
      complement pte_numa() (SPECIAL with neither PRESENT nor PROTNONE).  A
      hint that this was a problem was that c46a7c81 added pte_numa() test
      to vm_normal_page(), and moved its is_zero_pfn() test from slow to fast
      path: This was papering over a pte_special() snag when the zero page was
      encountered during zap.  This patch reverts vm_normal_page() to how it
      was before, relying on pte_special().
      
      It still appears that this patch may be incomplete: aren't there other
      places which need to be handling PROTNONE along with PRESENT?  For
      example, pte_mknuma() clears _PAGE_PRESENT and sets _PAGE_NUMA, but on a
      PROT_NONE area, that would make it pte_special().  This is side-stepped
      by the fact that NUMA hinting faults skipped PROT_NONE VMAs and there
      are no grounds where a NUMA hinting fault on a PROT_NONE VMA would be
      interesting.
      
      Fixes: c46a7c81 ("x86: define _PAGE_NUMA by reusing software bits on the PMD and PTE levels")
      Reported-by: NSasha Levin <sasha.levin@oracle.com>
      Tested-by: NSasha Levin <sasha.levin@oracle.com>
      Signed-off-by: NHugh Dickins <hughd@google.com>
      Signed-off-by: NMel Gorman <mgorman@suse.de>
      Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Cc: Cyrill Gorcunov <gorcunov@gmail.com>
      Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>
      Cc: <stable@vger.kernel.org>	[3.16]
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      b38af472
  2. 19 8月, 2014 1 次提交
  3. 16 8月, 2014 1 次提交
  4. 09 8月, 2014 4 次提交
    • V
      kexec: support for kexec on panic using new system call · dd5f7260
      Vivek Goyal 提交于
      This patch adds support for loading a kexec on panic (kdump) kernel usning
      new system call.
      
      It prepares ELF headers for memory areas to be dumped and for saved cpu
      registers.  Also prepares the memory map for second kernel and limits its
      boot to reserved areas only.
      Signed-off-by: NVivek Goyal <vgoyal@redhat.com>
      Cc: Borislav Petkov <bp@suse.de>
      Cc: Michael Kerrisk <mtk.manpages@gmail.com>
      Cc: Yinghai Lu <yinghai@kernel.org>
      Cc: Eric Biederman <ebiederm@xmission.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Matthew Garrett <mjg59@srcf.ucam.org>
      Cc: Greg Kroah-Hartman <greg@kroah.com>
      Cc: Dave Young <dyoung@redhat.com>
      Cc: WANG Chao <chaowang@redhat.com>
      Cc: Baoquan He <bhe@redhat.com>
      Cc: Andy Lutomirski <luto@amacapital.net>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      dd5f7260
    • V
      kexec-bzImage64: support for loading bzImage using 64bit entry · 27f48d3e
      Vivek Goyal 提交于
      This is loader specific code which can load bzImage and set it up for
      64bit entry.  This does not take care of 32bit entry or real mode entry.
      
      32bit mode entry can be implemented if somebody needs it.
      Signed-off-by: NVivek Goyal <vgoyal@redhat.com>
      Cc: Borislav Petkov <bp@suse.de>
      Cc: Michael Kerrisk <mtk.manpages@gmail.com>
      Cc: Yinghai Lu <yinghai@kernel.org>
      Cc: Eric Biederman <ebiederm@xmission.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Matthew Garrett <mjg59@srcf.ucam.org>
      Cc: Greg Kroah-Hartman <greg@kroah.com>
      Cc: Dave Young <dyoung@redhat.com>
      Cc: WANG Chao <chaowang@redhat.com>
      Cc: Baoquan He <bhe@redhat.com>
      Cc: Andy Lutomirski <luto@amacapital.net>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      27f48d3e
    • A
      arm64,ia64,ppc,s390,sh,tile,um,x86,mm: remove default gate area · a6c19dfe
      Andy Lutomirski 提交于
      The core mm code will provide a default gate area based on
      FIXADDR_USER_START and FIXADDR_USER_END if
      !defined(__HAVE_ARCH_GATE_AREA) && defined(AT_SYSINFO_EHDR).
      
      This default is only useful for ia64.  arm64, ppc, s390, sh, tile, 64-bit
      UML, and x86_32 have their own code just to disable it.  arm, 32-bit UML,
      and x86_64 have gate areas, but they have their own implementations.
      
      This gets rid of the default and moves the code into ia64.
      
      This should save some code on architectures without a gate area: it's now
      possible to inline the gate_area functions in the default case.
      Signed-off-by: NAndy Lutomirski <luto@amacapital.net>
      Acked-by: NNathan Lynch <nathan_lynch@mentor.com>
      Acked-by: NH. Peter Anvin <hpa@linux.intel.com>
      Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [in principle]
      Acked-by: Richard Weinberger <richard@nod.at> [for um]
      Acked-by: Will Deacon <will.deacon@arm.com> [for arm64]
      Cc: Catalin Marinas <catalin.marinas@arm.com>
      Cc: Will Deacon <will.deacon@arm.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: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Cc: Jeff Dike <jdike@addtoit.com>
      Cc: Richard Weinberger <richard@nod.at>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Nathan Lynch <Nathan_Lynch@mentor.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      a6c19dfe
    • L
      lib/scatterlist: make ARCH_HAS_SG_CHAIN an actual Kconfig · 308c09f1
      Laura Abbott 提交于
      Rather than have architectures #define ARCH_HAS_SG_CHAIN in an
      architecture specific scatterlist.h, make it a proper Kconfig option and
      use that instead.  At same time, remove the header files are are now
      mostly useless and just include asm-generic/scatterlist.h.
      
      [sfr@canb.auug.org.au: powerpc files now need asm/dma.h]
      Signed-off-by: NLaura Abbott <lauraa@codeaurora.org>
      Acked-by: Thomas Gleixner <tglx@linutronix.de>			[x86]
      Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>	[powerpc]
      Acked-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Tony Luck <tony.luck@intel.com>
      Cc: Fenghua Yu <fenghua.yu@intel.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      308c09f1
  5. 31 7月, 2014 10 次提交
  6. 29 7月, 2014 1 次提交
  7. 26 7月, 2014 3 次提交
  8. 23 7月, 2014 1 次提交
  9. 21 7月, 2014 3 次提交
  10. 19 7月, 2014 1 次提交
    • M
      x86/reboot: Add EFI reboot quirk for ACPI Hardware Reduced flag · 44be28e9
      Matt Fleming 提交于
      It appears that the BayTrail-T class of hardware requires EFI in order
      to powerdown and reboot and no other reliable method exists.
      
      This quirk is generally applicable to all hardware that has the ACPI
      Hardware Reduced bit set, since usually ACPI would be the preferred
      method.
      
      Cc: Len Brown <len.brown@intel.com>
      Cc: Mark Salter <msalter@redhat.com>
      Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
      Signed-off-by: NMatt Fleming <matt.fleming@intel.com>
      44be28e9
  11. 17 7月, 2014 3 次提交
    • S
      ftrace/x86: Have function graph tracer use its own trampoline · 1026ff9b
      Steven Rostedt (Red Hat) 提交于
      The function graph trampoline is called from the function trampoline
      and both do a save and restore of registers. The save of registers
      done by the function trampoline when only the function graph tracer
      is running is a waste of CPU cycles.
      
      As the function graph tracer trampoline in x86 is dependent from
      the function trampoline, we can call it directly when a function
      is only being traced by the function graph trampoline.
      Acked-by: NH. Peter Anvin <hpa@linux.intel.com>
      Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      1026ff9b
    • D
      arch, locking: Ciao arch_mutex_cpu_relax() · 3a6bfbc9
      Davidlohr Bueso 提交于
      The arch_mutex_cpu_relax() function, introduced by 34b133f8, is
      hacky and ugly. It was added a few years ago to address the fact
      that common cpu_relax() calls include yielding on s390, and thus
      impact the optimistic spinning functionality of mutexes. Nowadays
      we use this function well beyond mutexes: rwsem, qrwlock, mcs and
      lockref. Since the macro that defines the call is in the mutex header,
      any users must include mutex.h and the naming is misleading as well.
      
      This patch (i) renames the call to cpu_relax_lowlatency  ("relax, but
      only if you can do it with very low latency") and (ii) defines it in
      each arch's asm/processor.h local header, just like for regular cpu_relax
      functions. On all archs, except s390, cpu_relax_lowlatency is simply cpu_relax,
      and thus we can take it out of mutex.h. While this can seem redundant,
      I believe it is a good choice as it allows us to move out arch specific
      logic from generic locking primitives and enables future(?) archs to
      transparently define it, similarly to System Z.
      Signed-off-by: NDavidlohr Bueso <davidlohr@hp.com>
      Signed-off-by: NPeter Zijlstra <peterz@infradead.org>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: Anton Blanchard <anton@samba.org>
      Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Bharat Bhushan <r65777@freescale.com>
      Cc: Catalin Marinas <catalin.marinas@arm.com>
      Cc: Chen Liqin <liqin.linux@gmail.com>
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Cc: Christian Borntraeger <borntraeger@de.ibm.com>
      Cc: Chris Zankel <chris@zankel.net>
      Cc: David Howells <dhowells@redhat.com>
      Cc: David S. Miller <davem@davemloft.net>
      Cc: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
      Cc: Dominik Dingel <dingel@linux.vnet.ibm.com>
      Cc: Fenghua Yu <fenghua.yu@intel.com>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
      Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Helge Deller <deller@gmx.de>
      Cc: Hirokazu Takata <takata@linux-m32r.org>
      Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
      Cc: James E.J. Bottomley <jejb@parisc-linux.org>
      Cc: James Hogan <james.hogan@imgtec.com>
      Cc: Jason Wang <jasowang@redhat.com>
      Cc: Jesper Nilsson <jesper.nilsson@axis.com>
      Cc: Joe Perches <joe@perches.com>
      Cc: Jonas Bonn <jonas@southpole.se>
      Cc: Joseph Myers <joseph@codesourcery.com>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
      Cc: Lennox Wu <lennox.wu@gmail.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Mark Salter <msalter@redhat.com>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Matt Turner <mattst88@gmail.com>
      Cc: Max Filippov <jcmvbkbc@gmail.com>
      Cc: Michael Neuling <mikey@neuling.org>
      Cc: Michal Simek <monstr@monstr.eu>
      Cc: Mikael Starvik <starvik@axis.com>
      Cc: Nicolas Pitre <nico@linaro.org>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: Paul Burton <paul.burton@imgtec.com>
      Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
      Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Qais Yousef <qais.yousef@imgtec.com>
      Cc: Qiaowei Ren <qiaowei.ren@intel.com>
      Cc: Rafael Wysocki <rafael.j.wysocki@intel.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Richard Henderson <rth@twiddle.net>
      Cc: Richard Kuo <rkuo@codeaurora.org>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Steven Miao <realmz6@gmail.com>
      Cc: Steven Rostedt <srostedt@redhat.com>
      Cc: Stratos Karafotis <stratosk@semaphore.gr>
      Cc: Tim Chen <tim.c.chen@linux.intel.com>
      Cc: Tony Luck <tony.luck@intel.com>
      Cc: Vasily Kulikov <segoon@openwall.com>
      Cc: Vineet Gupta <vgupta@synopsys.com>
      Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com>
      Cc: Waiman Long <Waiman.Long@hp.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Wolfram Sang <wsa@the-dreams.de>
      Cc: adi-buildroot-devel@lists.sourceforge.net
      Cc: linux390@de.ibm.com
      Cc: linux-alpha@vger.kernel.org
      Cc: linux-am33-list@redhat.com
      Cc: linux-arm-kernel@lists.infradead.org
      Cc: linux-c6x-dev@linux-c6x.org
      Cc: linux-cris-kernel@axis.com
      Cc: linux-hexagon@vger.kernel.org
      Cc: linux-ia64@vger.kernel.org
      Cc: linux@lists.openrisc.net
      Cc: linux-m32r-ja@ml.linux-m32r.org
      Cc: linux-m32r@ml.linux-m32r.org
      Cc: linux-m68k@lists.linux-m68k.org
      Cc: linux-metag@vger.kernel.org
      Cc: linux-mips@linux-mips.org
      Cc: linux-parisc@vger.kernel.org
      Cc: linuxppc-dev@lists.ozlabs.org
      Cc: linux-s390@vger.kernel.org
      Cc: linux-sh@vger.kernel.org
      Cc: linux-xtensa@linux-xtensa.org
      Cc: sparclinux@vger.kernel.org
      Link: http://lkml.kernel.org/r/1404079773.2619.4.camel@buesod1.americas.hpqcorp.netSigned-off-by: NIngo Molnar <mingo@kernel.org>
      3a6bfbc9
    • A
      perf kvm: Use defines of kvm events · 44b38021
      Alexander Yarygin 提交于
      Currently perf-kvm uses string literals for kvm event names, but it
      works only for x86, because other architectures may have other names for
      those events.
      
      To reduce dependence on architecture, we add <asm/kvm_perf.h> file with
      defines for:
      
      - kvm_entry and kvm_exit events,
      - exit reason field name in kvm_exit event,
      - length of exit reasons strings,
      - vcpu_id field name in kvm trace events,
      
      and replace literals in perf-kvm.
      Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com>
      Reviewed-by David Ahern <dsahern@gmail.com>
      Signed-off-by: NAlexander Yarygin <yarygin@linux.vnet.ibm.com>
      Acked-by: NChristian Borntraeger <borntraeger@de.ibm.com>
      Cc: Christian Borntraeger <borntraeger@de.ibm.com>
      Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Link: http://lkml.kernel.org/r/1404397747-20939-2-git-send-email-yarygin@linux.vnet.ibm.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      44b38021
  12. 15 7月, 2014 2 次提交
  13. 14 7月, 2014 1 次提交
  14. 12 7月, 2014 2 次提交
  15. 11 7月, 2014 6 次提交