Eric Lee / smarc-fsl-linux-kernel

06 May, 2011

1 commit

  • 228e548e6   net: Add sendmmsg socket system call ... Browse Code »
    1

    This patch adds a multiple message send syscall and is the send
    version of the existing recvmmsg syscall. This is heavily
    based on the patch by Arnaldo that added recvmmsg.

    I wrote a microbenchmark to test the performance gains of using
    this new syscall:

    http://ozlabs.org/~anton/junkcode/sendmmsg_test.c

    The test was run on a ppc64 box with a 10 Gbit network card. The
    benchmark can send both UDP and RAW ethernet packets.

    64B UDP

    batch pkts/sec
    1 804570
    2 872800 (+ 8 %)
    4 916556 (+14 %)
    8 939712 (+17 %)
    16 952688 (+18 %)
    32 956448 (+19 %)
    64 964800 (+20 %)

    64B raw socket

    batch pkts/sec
    1 1201449
    2 1350028 (+12 %)
    4 1461416 (+22 %)
    8 1513080 (+26 %)
    16 1541216 (+28 %)
    32 1553440 (+29 %)
    64 1557888 (+30 %)

    We see a 20% improvement in throughput on UDP send and 30%
    on raw socket send.

    [ Add sparc syscall entries. -DaveM ]

    Signed-off-by: Anton Blanchard
    Signed-off-by: David S. Miller

    Anton Blanchard
     

08 Apr, 2011

1 commit

01 Apr, 2011

1 commit

31 Mar, 2011

3 commits

  • 25985edce   Fix common misspellings ... Browse Code »

    Fixes generated by 'codespell' and manually reviewed.

    Signed-off-by: Lucas De Marchi

    Lucas De Marchi
     
  • 47c7c97a9   sparc32: Pass task_struct to schedule_tail() in ret_from_fork ... Browse Code »

    We have to pass task_struct of previous process to function
    schedule_tail(). Currently in ret_from_fork previous thread_info
    is passed:

    switch_to: mov %g6, %g3 /* previous thread_info in g6 */

    ret_from_fork: call schedule_tail
    mov %g3, %o0 /* previous thread_info is passed */

    void schedule_tail(struct task_struct *prev);

    Signed-off-by: Tkhai Kirill
    Signed-off-by: David S. Miller

    Tkhai Kirill
     
  • 3628aa065   sparc64: Fix section mis-match errors. ... Browse Code »

    Fix all of the problems spotted by CONFIG_DEBUG_SECTION_MISMATCH under
    arch/sparc during a 64-bit defconfig build.

    They fall into two categorites:

    1) of_device_id is marked as __initdata, and we can never do this
    since these objects sit in the device core data structures way
    past boot. So even if a driver will never be reloaded, we have
    to keep the device ID table around.

    Mark such cases const instead.

    2) The bootmem alloc/free handling code in mdesc.c was not fully
    marked __init as it should be, thus generating a reference
    to free_bootmem_late() (which is __init) from non-__init code.

    Signed-off-by: David S. Miller

    David S. Miller
     

30 Mar, 2011

2 commits

29 Mar, 2011

4 commits

26 Mar, 2011

1 commit

25 Mar, 2011

2 commits

  • b2b755b5f   lib, arch: add filter argument to show_mem and fix private implementations ... Browse Code »

    Commit ddd588b5dd55 ("oom: suppress nodes that are not allowed from
    meminfo on oom kill") moved lib/show_mem.o out of lib/lib.a, which
    resulted in build warnings on all architectures that implement their own
    versions of show_mem():

    lib/lib.a(show_mem.o): In function `show_mem':
    show_mem.c:(.text+0x1f4): multiple definition of `show_mem'
    arch/sparc/mm/built-in.o:(.text+0xd70): first defined here

    The fix is to remove __show_mem() and add its argument to show_mem() in
    all implementations to prevent this breakage.

    Architectures that implement their own show_mem() actually don't do
    anything with the argument yet, but they could be made to filter nodes
    that aren't allowed in the current context in the future just like the
    generic implementation.

    Reported-by: Stephen Rothwell
    Reported-by: James Bottomley
    Suggested-by: Andrew Morton
    Signed-off-by: David Rientjes
    Signed-off-by: Linus Torvalds

    David Rientjes
     
  • 1c833bc3b   sparc32: Fix multiple RTC detections on SUN4D ... Browse Code »

    During the preparation for testing the recent changes made to the SUN4D
    specific code in the kernel by Sam Ravnborg the following was discovered:

    Since the removal of of_platform_bus_type (commit: eca3930163ba8884060ce9d9ff5ef0d9b7c7b00f )
    multiboard SUN4Ds have not been able to boot. The kernel crashes due to a
    zero-pointer error encountered when registering multiple M48T59 RTCs
    (There is one on each board).

    A patch for the was previously submitted, but the problem was not a
    serious at that time, as it would only generate warnings. Now the kernel
    will crash and stop executing before the serial console has been started.
    (Crash output can be viewed by using the -p boot flag)

    Signed-off-by: Kjetil Oftedal
    Signed-off-by: David S. Miller

    Kjetil Oftedal
     

24 Mar, 2011

5 commits

  • 854772775   remove dma64_addr_t ... Browse Code »

    There is no user now.

    Signed-off-by: FUJITA Tomonori
    Cc: David Miller
    Cc: Ralf Baechle
    Cc: Richard Henderson
    Cc: Ivan Kokshaysky
    Cc: Matt Turner
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    FUJITA Tomonori
     
  • 61f2e7b0f   bitops: remove minix bitops from asm/bitops.h ... Browse Code »

    minix bit operations are only used by minix filesystem and useless by
    other modules. Because byte order of inode and block bitmaps is different
    on each architecture like below:

    m68k:
    big-endian 16bit indexed bitmaps

    h8300, microblaze, s390, sparc, m68knommu:
    big-endian 32 or 64bit indexed bitmaps

    m32r, mips, sh, xtensa:
    big-endian 32 or 64bit indexed bitmaps for big-endian mode
    little-endian bitmaps for little-endian mode

    Others:
    little-endian bitmaps

    In order to move minix bit operations from asm/bitops.h to architecture
    independent code in minix filesystem, this provides two config options.

    CONFIG_MINIX_FS_BIG_ENDIAN_16BIT_INDEXED is only selected by m68k.
    CONFIG_MINIX_FS_NATIVE_ENDIAN is selected by the architectures which use
    native byte order bitmaps (h8300, microblaze, s390, sparc, m68knommu,
    m32r, mips, sh, xtensa). The architectures which always use little-endian
    bitmaps do not select these options.

    Finally, we can remove minix bit operations from asm/bitops.h for all
    architectures.

    Signed-off-by: Akinobu Mita
    Acked-by: Arnd Bergmann
    Acked-by: Greg Ungerer
    Cc: Geert Uytterhoeven
    Cc: Roman Zippel
    Cc: Andreas Schwab
    Cc: Martin Schwidefsky
    Cc: Heiko Carstens
    Cc: Yoshinori Sato
    Cc: Michal Simek
    Cc: "David S. Miller"
    Cc: Hirokazu Takata
    Acked-by: Ralf Baechle
    Acked-by: Paul Mundt
    Cc: Chris Zankel
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Akinobu Mita
     
  • f312eff81   bitops: remove ext2 non-atomic bitops from asm/bitops.h ... Browse Code »

    As the result of conversions, there are no users of ext2 non-atomic bit
    operations except for ext2 filesystem itself. Now we can put them into
    architecture independent code in ext2 filesystem, and remove from
    asm/bitops.h for all architectures.

    Signed-off-by: Akinobu Mita
    Cc: Jan Kara
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Akinobu Mita
     
  • 861b5ae7c   bitops: introduce little-endian bitops for most architectures ... Browse Code »

    Introduce little-endian bit operations to the big-endian architectures
    which do not have native little-endian bit operations and the
    little-endian architectures. (alpha, avr32, blackfin, cris, frv, h8300,
    ia64, m32r, mips, mn10300, parisc, sh, sparc, tile, x86, xtensa)

    These architectures can just include generic implementation
    (asm-generic/bitops/le.h).

    Signed-off-by: Akinobu Mita
    Cc: Richard Henderson
    Cc: Ivan Kokshaysky
    Cc: Mikael Starvik
    Cc: David Howells
    Cc: Yoshinori Sato
    Cc: "Luck, Tony"
    Cc: Ralf Baechle
    Cc: Kyle McMartin
    Cc: Matthew Wilcox
    Cc: Grant Grundler
    Cc: Paul Mundt
    Cc: Kazumoto Kojima
    Cc: Hirokazu Takata
    Cc: "David S. Miller"
    Cc: Chris Zankel
    Cc: Ingo Molnar
    Cc: Thomas Gleixner
    Acked-by: Hans-Christian Egtvedt
    Acked-by: "H. Peter Anvin"
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Akinobu Mita
     
  • 0664996b7   bitops: introduce CONFIG_GENERIC_FIND_BIT_LE ... Browse Code »

    This introduces CONFIG_GENERIC_FIND_BIT_LE to tell whether to use generic
    implementation of find_*_bit_le() in lib/find_next_bit.c or not.

    For now we select CONFIG_GENERIC_FIND_BIT_LE for all architectures which
    enable CONFIG_GENERIC_FIND_NEXT_BIT.

    But m68knommu wants to define own faster find_next_zero_bit_le() and
    continues using generic find_next_{,zero_}bit().
    (CONFIG_GENERIC_FIND_NEXT_BIT and !CONFIG_GENERIC_FIND_BIT_LE)

    Signed-off-by: Akinobu Mita
    Cc: Greg Ungerer
    Cc: Arnd Bergmann
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Akinobu Mita
     

23 Mar, 2011

2 commits

  • 3e50594e8   add the common dma_addr_t typedef to include/linux/types.h ... Browse Code »

    All architectures can use the common dma_addr_t typedef now. We can
    remove the arch specific dma_addr_t.

    Signed-off-by: FUJITA Tomonori
    Acked-by: Arnd Bergmann
    Cc: Ingo Molnar
    Cc: Thomas Gleixner
    Cc: "H. Peter Anvin"
    Cc: Ivan Kokshaysky
    Cc: Richard Henderson
    Cc: Matt Turner
    Cc: "Luck, Tony"
    Cc: Ralf Baechle
    Cc: Benjamin Herrenschmidt
    Cc: Heiko Carstens
    Cc: Martin Schwidefsky
    Cc: Chris Metcalf
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    FUJITA Tomonori
     
  • b6a84016b   mm: NUMA aware alloc_thread_info_node() ... Browse Code »

    Add a node parameter to alloc_thread_info(), and change its name to
    alloc_thread_info_node()

    This change is needed to allow NUMA aware kthread_create_on_cpu()

    Signed-off-by: Eric Dumazet
    Acked-by: David S. Miller
    Reviewed-by: Andi Kleen
    Acked-by: Rusty Russell
    Cc: Tejun Heo
    Cc: Tony Luck
    Cc: Fenghua Yu
    Cc: David Howells
    Cc:
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Eric Dumazet
     

19 Mar, 2011

4 commits

18 Mar, 2011

2 commits

  • ec0afc931   Merge branch 'kvm-updates/2.6.39' of git://git.kernel.org/pub/scm/virt/kvm/kvm ... Browse Code »

    * 'kvm-updates/2.6.39' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (55 commits)
    KVM: unbreak userspace that does not sets tss address
    KVM: MMU: cleanup pte write path
    KVM: MMU: introduce a common function to get no-dirty-logged slot
    KVM: fix rcu usage in init_rmode_* functions
    KVM: fix kvmclock regression due to missing clock update
    KVM: emulator: Fix permission checking in io permission bitmap
    KVM: emulator: Fix io permission checking for 64bit guest
    KVM: SVM: Load %gs earlier if CONFIG_X86_32_LAZY_GS=n
    KVM: x86: Remove useless regs_page pointer from kvm_lapic
    KVM: improve comment on rcu use in irqfd_deassign
    KVM: MMU: remove unused macros
    KVM: MMU: cleanup page alloc and free
    KVM: MMU: do not record gfn in kvm_mmu_pte_write
    KVM: MMU: move mmu pages calculated out of mmu lock
    KVM: MMU: set spte accessed bit properly
    KVM: MMU: fix kvm_mmu_slot_remove_write_access dropping intermediate W bits
    KVM: Start lock documentation
    KVM: better readability of efer_reserved_bits
    KVM: Clear async page fault hash after switching to real mode
    KVM: VMX: Initialize vm86 TSS only once.
    ...

    Linus Torvalds
     
  • 69ebb83e1   mm: make __get_user_pages return -EHWPOISON for HWPOISON page optionally ... Browse Code »

    Make __get_user_pages return -EHWPOISON for HWPOISON page only if
    FOLL_HWPOISON is specified. With this patch, the interested callers
    can distinguish HWPOISON pages from general FAULT pages, while other
    callers will still get -EFAULT for all these pages, so the user space
    interface need not to be changed.

    This feature is needed by KVM, where UCR MCE should be relayed to
    guest for HWPOISON page, while instruction emulation and MMIO will be
    tried for general FAULT page.

    The idea comes from Andrew Morton.

    Signed-off-by: Huang Ying
    Cc: Andrew Morton
    Signed-off-by: Marcelo Tosatti
    Signed-off-by: Avi Kivity

    Huang Ying
     

17 Mar, 2011

12 commits