Eric Lee / smarc-fsl-linux-kernel

20 Jul, 2007

2 commits

  • 5fb7dc37d   define new percpu interface for shared data ... Browse Code »

    per cpu data section contains two types of data. One set which is
    exclusively accessed by the local cpu and the other set which is per cpu,
    but also shared by remote cpus. In the current kernel, these two sets are
    not clearely separated out. This can potentially cause the same data
    cacheline shared between the two sets of data, which will result in
    unnecessary bouncing of the cacheline between cpus.

    One way to fix the problem is to cacheline align the remotely accessed per
    cpu data, both at the beginning and at the end. Because of the padding at
    both ends, this will likely cause some memory wastage and also the
    interface to achieve this is not clean.

    This patch:

    Moves the remotely accessed per cpu data (which is currently marked
    as ____cacheline_aligned_in_smp) into a different section, where all the data
    elements are cacheline aligned. And as such, this differentiates the local
    only data and remotely accessed data cleanly.

    Signed-off-by: Fenghua Yu
    Acked-by: Suresh Siddha
    Cc: Rusty Russell
    Cc: Christoph Lameter
    Cc:
    Cc: "Luck, Tony"
    Cc: Andi Kleen
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Fenghua Yu
     
  • 83c54070e   mm: fault feedback #2 ... Browse Code »

    This patch completes Linus's wish that the fault return codes be made into
    bit flags, which I agree makes everything nicer. This requires requires
    all handle_mm_fault callers to be modified (possibly the modifications
    should go further and do things like fault accounting in handle_mm_fault --
    however that would be for another patch).

    [akpm@linux-foundation.org: fix alpha build]
    [akpm@linux-foundation.org: fix s390 build]
    [akpm@linux-foundation.org: fix sparc build]
    [akpm@linux-foundation.org: fix sparc64 build]
    [akpm@linux-foundation.org: fix ia64 build]
    Signed-off-by: Nick Piggin
    Cc: Richard Henderson
    Cc: Ivan Kokshaysky
    Cc: Russell King
    Cc: Ian Molton
    Cc: Bryan Wu
    Cc: Mikael Starvik
    Cc: David Howells
    Cc: Yoshinori Sato
    Cc: "Luck, Tony"
    Cc: Hirokazu Takata
    Cc: Geert Uytterhoeven
    Cc: Roman Zippel
    Cc: Greg Ungerer
    Cc: Matthew Wilcox
    Cc: Paul Mackerras
    Cc: Benjamin Herrenschmidt
    Cc: Heiko Carstens
    Cc: Martin Schwidefsky
    Cc: Paul Mundt
    Cc: Kazumoto Kojima
    Cc: Richard Curnow
    Cc: William Lee Irwin III
    Cc: "David S. Miller"
    Cc: Jeff Dike
    Cc: Paolo 'Blaisorblade' Giarrusso
    Cc: Miles Bader
    Cc: Chris Zankel
    Acked-by: Kyle McMartin
    Acked-by: Haavard Skinnemoen
    Acked-by: Ralf Baechle
    Acked-by: Andi Kleen
    Signed-off-by: Andrew Morton
    [ Still apparently needs some ARM and PPC loving - Linus ]
    Signed-off-by: Linus Torvalds

    Nick Piggin
     

18 Jul, 2007

3 commits

17 Jul, 2007

1 commit

  • 45e98cdb6   page table handling cleanup ... Browse Code »

    Kill pte_rdprotect(), pte_exprotect(), pte_mkread(), pte_mkexec(), pte_read(),
    pte_exec(), and pte_user() except where arch-specific code is making use of
    them.

    Signed-off-by: Jan Beulich
    Cc: Andi Kleen
    Cc: Christoph Hellwig
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Jan Beulich
     

12 Jul, 2007

1 commit

10 Jul, 2007

1 commit

  • 0437e109e   sched: zap the migration init / cache-hot balancing code ... Browse Code »

    the SMP load-balancer uses the boot-time migration-cost estimation
    code to attempt to improve the quality of balancing. The reason for
    this code is that the discrete priority queues do not preserve
    the order of scheduling accurately, so the load-balancer skips
    tasks that were running on a CPU 'recently'.

    this code is fundamental fragile: the boot-time migration cost detector
    doesnt really work on systems that had large L3 caches, it caused boot
    delays on large systems and the whole cache-hot concept made the
    balancing code pretty undeterministic as well.

    (and hey, i wrote most of it, so i can say it out loud that it sucks ;-)

    under CFS the same purpose of cache affinity can be achieved without
    any special cache-hot special-case: tasks are sorted in the 'timeline'
    tree and the SMP balancer picks tasks from the left side of the
    tree, thus the most cache-cold task is balanced automatically.

    Signed-off-by: Ingo Molnar

    Ingo Molnar
     

31 May, 2007

1 commit

  • 1fb8812ba   [SPARC32]: Build fix. ... Browse Code »

    Fix 6197fe4d720ea3e2ee94cdc7ef32d6c0151199de

    arch/sparc/lib/atomic32.c: In function '__cmpxchg_u32':
    arch/sparc/lib/atomic32.c:127: error: 'addr' undeclared (first use in this function)
    arch/sparc/lib/atomic32.c:127: error: (Each undeclared identifier is reported only once
    arch/sparc/lib/atomic32.c:127: error: for each function it appears in.)

    I assume this is what was intended..

    Signed-off-by: Andrew Morton
    Acked-by: William Irwin
    Signed-off-by: David S. Miller

    Andrew Morton
     

29 May, 2007

3 commits

19 May, 2007

2 commits

14 May, 2007

2 commits

12 May, 2007

2 commits

10 May, 2007

1 commit

  • f7e4217b0   rename thread_info to stack ... Browse Code »

    This finally renames the thread_info field in task structure to stack, so that
    the assumptions about this field are gone and archs have more freedom about
    placing the thread_info structure.

    Nonbroken archs which have a proper thread pointer can do the access to both
    current thread and task structure via a single pointer.

    It'll allow for a few more cleanups of the fork code, from which e.g. ia64
    could benefit.

    Signed-off-by: Roman Zippel
    [akpm@linux-foundation.org: build fix]
    Cc: Richard Henderson
    Cc: Ivan Kokshaysky
    Cc: Russell King
    Cc: Ian Molton
    Cc: Haavard Skinnemoen
    Cc: Mikael Starvik
    Cc: David Howells
    Cc: Yoshinori Sato
    Cc: "Luck, Tony"
    Cc: Hirokazu Takata
    Cc: Geert Uytterhoeven
    Cc: Roman Zippel
    Cc: Greg Ungerer
    Cc: Ralf Baechle
    Cc: Ralf Baechle
    Cc: Paul Mackerras
    Cc: Benjamin Herrenschmidt
    Cc: Heiko Carstens
    Cc: Martin Schwidefsky
    Cc: Paul Mundt
    Cc: Kazumoto Kojima
    Cc: Richard Curnow
    Cc: William Lee Irwin III
    Cc: "David S. Miller"
    Cc: Jeff Dike
    Cc: Paolo 'Blaisorblade' Giarrusso
    Cc: Miles Bader
    Cc: Andi Kleen
    Cc: Chris Zankel
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Roman Zippel
     

09 May, 2007

3 commits

  • 6c1142602   [SPARC]: Wire up utimensat syscall. ... Browse Code »

    Signed-off-by: David S. Miller

    David S. Miller
     
  • e63340ae6   header cleaning: don't include smp_lock.h when not used ... Browse Code »

    Remove includes of where it is not used/needed.
    Suggested by Al Viro.

    Builds cleanly on x86_64, i386, alpha, ia64, powerpc, sparc,
    sparc64, and arm (all 59 defconfigs).

    Signed-off-by: Randy Dunlap
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Randy Dunlap
     
  • 1eeb66a1b   move die notifier handling to common code ... Browse Code »

    This patch moves the die notifier handling to common code. Previous
    various architectures had exactly the same code for it. Note that the new
    code is compiled unconditionally, this should be understood as an appel to
    the other architecture maintainer to implement support for it aswell (aka
    sprinkling a notify_die or two in the proper place)

    arm had a notifiy_die that did something totally different, I renamed it to
    arm_notify_die as part of the patch and made it static to the file it's
    declared and used at. avr32 used to pass slightly less information through
    this interface and I brought it into line with the other architectures.

    [akpm@linux-foundation.org: build fix]
    [akpm@linux-foundation.org: fix vmalloc_sync_all bustage]
    [bryan.wu@analog.com: fix vmalloc_sync_all in nommu]
    Signed-off-by: Christoph Hellwig
    Cc:
    Cc: Russell King
    Signed-off-by: Bryan Wu
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Christoph Hellwig
     

07 May, 2007

1 commit

03 May, 2007

1 commit

  • b6e3590f8   [PATCH] x86: Allow percpu variables to be page-aligned ... Browse Code »

    Let's allow page-alignment in general for per-cpu data (wanted by Xen, and
    Ingo suggested KVM as well).

    Because larger alignments can use more room, we increase the max per-cpu
    memory to 64k rather than 32k: it's getting a little tight.

    Signed-off-by: Rusty Russell
    Signed-off-by: Jeremy Fitzhardinge
    Signed-off-by: Andi Kleen
    Acked-by: Ingo Molnar
    Cc: Andi Kleen
    Signed-off-by: Andrew Morton

    Jeremy Fitzhardinge
     

26 Apr, 2007

5 commits

13 Apr, 2007

2 commits

  • f6b45da12   [SPARC]: Fix section mismatch warnings in pci.c and pcic.c ... Browse Code »

    Fix section mismatch in arch/sparc/kernel/pcic.c and
    arch/sparc64/kernel/pci.c.

    Signed-off-by: Robert Reif
    Signed-off-by: David S. Miller

    Robert Reif
     
  • 1d51c69fb   [SPARC]: avoid CHILD_MAX and OPEN_MAX constants ... Browse Code »

    I don't figure anyone really cares about SunOS syscall emulation, and I
    certainly don't. But I'm getting rid of uses of the OPEN_MAX and CHILD_MAX
    compile-time constant, and these are almost the only ones. OPEN_MAX is a
    bogus constant with no meaning about anything. The RLIMIT_NOFILE resource
    limit is what sysconf (_SC_OPEN_MAX) actually wants to return.

    The CHILD_MAX cases weren't actually using anything I want to get rid of,
    but I noticed that they are there and are wrong too. The CHILD_MAX value
    is not really unlimited as a -1 return from sysconf indicates. The
    RLIMIT_NPROC resource limit is what sysconf (_SC_CHILD_MAX) wants to return.

    Signed-off-by: Roland McGrath
    Signed-off-by: David S. Miller

    Roland McGrath
     

27 Mar, 2007

1 commit

  • 74e61dee2   [SPARC32]: Fix SMP build regression ... Browse Code »

    commit b19cbe2a1695c09c74f83646c4b82b51123b3690 [BRIDGE]: Fix fdb RCU
    race

    breaks sparc SMP build because atomic_add_unless is not exported.

    This patch exports atomic_add_unless and atomic_cmpxchg.

    Signed-off-by: Robert Reif
    Signed-off-by: David S. Miller

    Robert Reif
     

15 Mar, 2007

1 commit

13 Mar, 2007

2 commits

03 Mar, 2007

3 commits

13 Feb, 2007

2 commits

  • 34cc560e6   [SPARC]: Re-export saved_command_line to modules. ... Browse Code »

    This reverts some bogosity from the dynamic command-line
    changes made on sparc32 and sparc64.

    Drivers such as drivers/sbus/char/openprom.c reference
    saved_command_line, and can be modular.

    The boot_command_line is __initdata, yet the dynamic command-line
    changes add modular exports of that symbol, obviously wrong.

    Signed-off-by: David S. Miller

    David S. Miller
     
  • 5dfe4c964   [PATCH] mark struct file_operations const 2 ... Browse Code »

    Many struct file_operations in the kernel can be "const". Marking them const
    moves these to the .rodata section, which avoids false sharing with potential
    dirty data. In addition it'll catch accidental writes at compile time to
    these shared resources.

    [akpm@osdl.org: sparc64 fix]
    Signed-off-by: Arjan van de Ven
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Arjan van de Ven