1. 26 Apr, 2012 6 commits
    • Peter Zijlstra's avatar
      sched: Fix more load-balancing fallout · eb95308e
      Peter Zijlstra authored
      Commits 367456c7 ("sched: Ditch per cgroup task lists for
      load-balancing") and 5d6523eb ("sched: Fix load-balance wreckage")
      left some more wreckage.
      
      By setting loop_max unconditionally to ->nr_running load-balancing
      could take a lot of time on very long runqueues (hackbench!). So keep
      the sysctl as max limit of the amount of tasks we'll iterate.
      
      Furthermore, the min load filter for migration completely fails with
      cgroups since inequality in per-cpu state can easily lead to such
      small loads :/
      
      Furthermore the change to add new tasks to the tail of the queue
      instead of the head seems to have some effect.. not quite sure I
      understand why.
      
      Combined these fixes solve the huge hackbench regression reported by
      Tim when hackbench is ran in a cgroup.
      Reported-by: default avatarTim Chen <tim.c.chen@linux.intel.com>
      Acked-by: default avatarTim Chen <tim.c.chen@linux.intel.com>
      Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Link: http://lkml.kernel.org/r/1335365763.28150.267.camel@twins
      [ got rid of the CONFIG_PREEMPT tuning and made small readability edits ]
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      eb95308e
    • Linus Torvalds's avatar
      Merge tag 'nfs-for-3.4-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs · 2300fd67
      Linus Torvalds authored
      Pull NFS client bugfixes from Trond Myklebust:
       - Fix NFSv4 infinite loops on open(O_TRUNC)
       - Fix an Oops and an infinite loop in the NFSv4 flock code
       - Don't register the PipeFS filesystem until it has been set up
       - Fix an Oops in nfs_try_to_update_request
       - Don't reuse NFSv4 open owners: fixes a bad sequence id storm.
      
      * tag 'nfs-for-3.4-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
        NFSv4: Keep dropped state owners on the LRU list for a while
        NFSv4: Ensure that we don't drop a state owner more than once
        NFSv4: Ensure we do not reuse open owner names
        nfs: Enclose hostname in brackets when needed in nfs_do_root_mount
        NFS: put open context on error in nfs_flush_multi
        NFS: put open context on error in nfs_pagein_multi
        NFSv4: Fix open(O_TRUNC) and ftruncate() error handling
        NFSv4: Ensure that we check lock exclusive/shared type against open modes
        NFSv4: Ensure that the LOCK code sets exception->inode
        NFS: check for req==NULL in nfs_try_to_update_request cleanup
        SUNRPC: register PipeFS file system after pernet sybsystem
      2300fd67
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 86ec090e
      Linus Torvalds authored
      Pull x86 fixes from H. Peter Anvin.
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x32, siginfo: Provide proper overrides for x32 siginfo_t
        asm-generic: Allow overriding clock_t and add attributes to siginfo_t
        x32: Check __ILP32__ instead of __LP64__ for x32
        x86, acpi: Call acpi_enter_sleep_state via an asmlinkage C function from assembler
        ACPI: Convert wake_sleep_flags to a value instead of function
        x86, apic: APIC code touches invalid MSR on P5 class machines
        i387: ptrace breaks the lazy-fpu-restore logic
        x86/platform: Remove incorrect error message in x86_default_fixup_cpu_id()
        x86, efi: Add dedicated EFI stub entry point
        x86/amd: Remove broken links from comment and kernel message
        x86, microcode: Ensure that module is only loaded on supported AMD CPUs
        x86, microcode: Fix sysfs warning during module unload on unsupported CPUs
      86ec090e
    • Linus Torvalds's avatar
      Merge branch 'for_linus' of git://cavan.codon.org.uk/platform-drivers-x86 · bdd4f709
      Linus Torvalds authored
      Pull x86 platform driver fixes from Matthew Garrett:
       "One annoyance fix (make intel_ips stop complaining unnecessarily) and
        one oops fix (unterminated list in dell-laptop).  Both have been in
        -next for a while with no complaints."
      
      * 'for_linus' of git://cavan.codon.org.uk/platform-drivers-x86:
        dell-laptop: Terminate quirks list properly
        intel_ips: Hush the i915 symbols message
      bdd4f709
    • Johannes Weiner's avatar
      mm: memcg: move pc lookup point to commit_charge() · ce587e65
      Johannes Weiner authored
      None of the callsites actually need the page_cgroup descriptor
      themselves, so just pass the page and do the look up in there.
      
      We already had two bugs (6568d4a9 'mm: memcg: update the correct soft
      limit tree during migration' and 'memcg: fix Bad page state after
      replace_page_cache') where the passed page and pc were not referring
      to the same page frame.
      Signed-off-by: default avatarJohannes Weiner <hannes@cmpxchg.org>
      Acked-by: default avatarHugh Dickins <hughd@google.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      ce587e65
    • David Miller's avatar
      mm: nobootmem: Correct alloc_bootmem semantics. · 4e1c2b28
      David Miller authored
      The comments above __alloc_bootmem_node() claim that the code will
      first try the allocation using 'goal' and if that fails it will
      try again but with the 'goal' requirement dropped.
      
      Unfortunately, this is not what the code does, so fix it to do so.
      
      This is important for nobootmem conversions to architectures such
      as sparc where MAX_DMA_ADDRESS is infinity.
      
      On such architectures all of the allocations done by generic spots,
      such as the sparse-vmemmap implementation, will pass in:
      
      	__pa(MAX_DMA_ADDRESS)
      
      as the goal, and with the limit given as "-1" this will always fail
      unless we add the appropriate fallback logic here.
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Acked-by: default avatarYinghai Lu <yinghai@kernel.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      4e1c2b28
  2. 24 Apr, 2012 15 commits
  3. 23 Apr, 2012 19 commits