1. 19 2月, 2016 10 次提交
  2. 18 2月, 2016 2 次提交
  3. 17 2月, 2016 1 次提交
  4. 16 2月, 2016 13 次提交
  5. 11 2月, 2016 1 次提交
  6. 04 2月, 2016 1 次提交
  7. 02 2月, 2016 1 次提交
  8. 25 1月, 2016 3 次提交
  9. 21 1月, 2016 1 次提交
    • C
      dma-mapping: always provide the dma_map_ops based implementation · e1c7e324
      Christoph Hellwig 提交于
      Move the generic implementation to <linux/dma-mapping.h> now that all
      architectures support it and remove the HAVE_DMA_ATTR Kconfig symbol now
      that everyone supports them.
      
      [valentinrothberg@gmail.com: remove leftovers in Kconfig]
      Signed-off-by: NChristoph Hellwig <hch@lst.de>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
      Cc: Chris Metcalf <cmetcalf@ezchip.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
      Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
      Cc: Helge Deller <deller@gmx.de>
      Cc: James Hogan <james.hogan@imgtec.com>
      Cc: Jesper Nilsson <jesper.nilsson@axis.com>
      Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
      Cc: Ley Foon Tan <lftan@altera.com>
      Cc: Mark Salter <msalter@redhat.com>
      Cc: Mikael Starvik <starvik@axis.com>
      Cc: Steven Miao <realmz6@gmail.com>
      Cc: Vineet Gupta <vgupta@synopsys.com>
      Cc: Christian Borntraeger <borntraeger@de.ibm.com>
      Cc: Joerg Roedel <jroedel@suse.de>
      Cc: Sebastian Ott <sebott@linux.vnet.ibm.com>
      Signed-off-by: NValentin Rothberg <valentinrothberg@gmail.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      e1c7e324
  10. 16 1月, 2016 3 次提交
    • D
      kvm: rename pfn_t to kvm_pfn_t · ba049e93
      Dan Williams 提交于
      To date, we have implemented two I/O usage models for persistent memory,
      PMEM (a persistent "ram disk") and DAX (mmap persistent memory into
      userspace).  This series adds a third, DAX-GUP, that allows DAX mappings
      to be the target of direct-i/o.  It allows userspace to coordinate
      DMA/RDMA from/to persistent memory.
      
      The implementation leverages the ZONE_DEVICE mm-zone that went into
      4.3-rc1 (also discussed at kernel summit) to flag pages that are owned
      and dynamically mapped by a device driver.  The pmem driver, after
      mapping a persistent memory range into the system memmap via
      devm_memremap_pages(), arranges for DAX to distinguish pfn-only versus
      page-backed pmem-pfns via flags in the new pfn_t type.
      
      The DAX code, upon seeing a PFN_DEV+PFN_MAP flagged pfn, flags the
      resulting pte(s) inserted into the process page tables with a new
      _PAGE_DEVMAP flag.  Later, when get_user_pages() is walking ptes it keys
      off _PAGE_DEVMAP to pin the device hosting the page range active.
      Finally, get_page() and put_page() are modified to take references
      against the device driver established page mapping.
      
      Finally, this need for "struct page" for persistent memory requires
      memory capacity to store the memmap array.  Given the memmap array for a
      large pool of persistent may exhaust available DRAM introduce a
      mechanism to allocate the memmap from persistent memory.  The new
      "struct vmem_altmap *" parameter to devm_memremap_pages() enables
      arch_add_memory() to use reserved pmem capacity rather than the page
      allocator.
      
      This patch (of 18):
      
      The core has developed a need for a "pfn_t" type [1].  Move the existing
      pfn_t in KVM to kvm_pfn_t [2].
      
      [1]: https://lists.01.org/pipermail/linux-nvdimm/2015-September/002199.html
      [2]: https://lists.01.org/pipermail/linux-nvdimm/2015-September/002218.htmlSigned-off-by: NDan Williams <dan.j.williams@intel.com>
      Acked-by: NChristoffer Dall <christoffer.dall@linaro.org>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      ba049e93
    • M
      arch/arm64/include/asm/pgtable.h: add pmd_mkclean for THP · 05ee26d9
      Minchan Kim 提交于
      MADV_FREE needs pmd_dirty and pmd_mkclean for detecting recent overwrite
      of the contents since MADV_FREE syscall is called for THP page.
      
      This patch adds pmd_mkclean for THP page MADV_FREE support.
      Signed-off-by: NMinchan Kim <minchan@kernel.org>
      Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
      Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
      Cc: Shaohua Li <shli@kernel.org>
      Cc: <yalin.wang2010@gmail.com>
      Cc: Andrea Arcangeli <aarcange@redhat.com>
      Cc: Andy Lutomirski <luto@amacapital.net>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Catalin Marinas <catalin.marinas@arm.com>
      Cc: Chen Gang <gang.chen.5i5j@gmail.com>
      Cc: Chris Zankel <chris@zankel.net>
      Cc: Daniel Micay <danielmicay@gmail.com>
      Cc: Darrick J. Wong <darrick.wong@oracle.com>
      Cc: David S. Miller <davem@davemloft.net>
      Cc: Helge Deller <deller@gmx.de>
      Cc: Hugh Dickins <hughd@google.com>
      Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
      Cc: Jason Evans <je@fb.com>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
      Cc: Kirill A. Shutemov <kirill@shutemov.name>
      Cc: Matt Turner <mattst88@gmail.com>
      Cc: Max Filippov <jcmvbkbc@gmail.com>
      Cc: Mel Gorman <mgorman@suse.de>
      Cc: Michael Kerrisk <mtk.manpages@gmail.com>
      Cc: Michal Hocko <mhocko@suse.com>
      Cc: Mika Penttil <mika.penttila@nextfour.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Richard Henderson <rth@twiddle.net>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Roland Dreier <roland@kernel.org>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Cc: Shaohua Li <shli@kernel.org>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Wu Fengguang <fengguang.wu@intel.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      05ee26d9
    • K
      arm64, thp: remove infrastructure for handling splitting PMDs · b7ed934a
      Kirill A. Shutemov 提交于
      With new refcounting we don't need to mark PMDs splitting.  Let's drop
      code to handle this.
      
      pmdp_splitting_flush() is not needed too: on splitting PMD we will do
      pmdp_clear_flush() + set_pte_at().  pmdp_clear_flush() will do IPI as
      needed for fast_gup.
      Signed-off-by: NKirill A. Shutemov <kirill.shutemov@linux.intel.com>
      Cc: Sasha Levin <sasha.levin@oracle.com>
      Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
      Cc: Jerome Marchand <jmarchan@redhat.com>
      Cc: Vlastimil Babka <vbabka@suse.cz>
      Cc: Andrea Arcangeli <aarcange@redhat.com>
      Cc: Hugh Dickins <hughd@google.com>
      Cc: Dave Hansen <dave.hansen@intel.com>
      Cc: Mel Gorman <mgorman@suse.de>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
      Cc: Steve Capper <steve.capper@linaro.org>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Cc: Michal Hocko <mhocko@suse.cz>
      Cc: Christoph Lameter <cl@linux.com>
      Cc: David Rientjes <rientjes@google.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      b7ed934a
  11. 13 1月, 2016 2 次提交
  12. 05 1月, 2016 1 次提交
    • W
      arm64: mm: move pgd_cache initialisation to pgtable_cache_init · 39b5be9b
      Will Deacon 提交于
      Initialising the suppport for EFI runtime services requires us to
      allocate a pgd off the back of an early_initcall. On systems where the
      PGD_SIZE is smaller than PAGE_SIZE (e.g. 64k pages and 48-bit VA), the
      pgd_cache isn't initialised at this stage, and we panic with a NULL
      dereference during boot:
      
        Unable to handle kernel NULL pointer dereference at virtual address 00000000
      
        __create_mapping.isra.5+0x84/0x350
        create_pgd_mapping+0x20/0x28
        efi_create_mapping+0x5c/0x6c
        arm_enable_runtime_services+0x154/0x1e4
        do_one_initcall+0x8c/0x190
        kernel_init_freeable+0x84/0x1ec
        kernel_init+0x10/0xe0
        ret_from_fork+0x10/0x50
      
      This patch fixes the problem by initialising the pgd_cache earlier, in
      the pgtable_cache_init callback, which sounds suspiciously like what it
      was intended for.
      Reported-by: NDennis Chen <dennis.chen@arm.com>
      Signed-off-by: NWill Deacon <will.deacon@arm.com>
      39b5be9b
  13. 22 12月, 2015 1 次提交
    • A
      arm64: ftrace: fix a stack tracer's output under function graph tracer · 20380bb3
      AKASHI Takahiro 提交于
      Function graph tracer modifies a return address (LR) in a stack frame
      to hook a function return. This will result in many useless entries
      (return_to_handler) showing up in
       a) a stack tracer's output
       b) perf call graph (with perf record -g)
       c) dump_backtrace (at panic et al.)
      
      For example, in case of a),
        $ echo function_graph > /sys/kernel/debug/tracing/current_tracer
        $ echo 1 > /proc/sys/kernel/stack_trace_enabled
        $ cat /sys/kernel/debug/tracing/stack_trace
              Depth    Size   Location    (54 entries)
              -----    ----   --------
        0)     4504      16   gic_raise_softirq+0x28/0x150
        1)     4488      80   smp_cross_call+0x38/0xb8
        2)     4408      48   return_to_handler+0x0/0x40
        3)     4360      32   return_to_handler+0x0/0x40
        ...
      
      In case of b),
        $ echo function_graph > /sys/kernel/debug/tracing/current_tracer
        $ perf record -e mem:XXX:x -ag -- sleep 10
        $ perf report
                        ...
                        |          |          |--0.22%-- 0x550f8
                        |          |          |          0x10888
                        |          |          |          el0_svc_naked
                        |          |          |          sys_openat
                        |          |          |          return_to_handler
                        |          |          |          return_to_handler
                        ...
      
      In case of c),
        $ echo function_graph > /sys/kernel/debug/tracing/current_tracer
        $ echo c > /proc/sysrq-trigger
        ...
        Call trace:
        [<ffffffc00044d3ac>] sysrq_handle_crash+0x24/0x30
        [<ffffffc000092250>] return_to_handler+0x0/0x40
        [<ffffffc000092250>] return_to_handler+0x0/0x40
        ...
      
      This patch replaces such entries with real addresses preserved in
      current->ret_stack[] at unwind_frame(). This way, we can cover all
      the cases.
      Reviewed-by: NJungseok Lee <jungseoklee85@gmail.com>
      Signed-off-by: NAKASHI Takahiro <takahiro.akashi@linaro.org>
      [will: fixed minor context changes conflicting with irq stack bits]
      Signed-off-by: NWill Deacon <will.deacon@arm.com>
      20380bb3