1. 18 Mar, 2013 35 commits
  2. 17 Mar, 2013 4 commits
    • Linus Torvalds's avatar
      Linux 3.9-rc3 · a937536b
      Linus Torvalds authored
      a937536b
    • David Rientjes's avatar
      perf,x86: fix link failure for non-Intel configs · 6c4d3bc9
      David Rientjes authored
      Commit 1d9d8639 ("perf,x86: fix kernel crash with PEBS/BTS after
      suspend/resume") introduces a link failure since
      perf_restore_debug_store() is only defined for CONFIG_CPU_SUP_INTEL:
      
      	arch/x86/power/built-in.o: In function `restore_processor_state':
      	(.text+0x45c): undefined reference to `perf_restore_debug_store'
      
      Fix it by defining the dummy function appropriately.
      Signed-off-by: default avatarDavid Rientjes <rientjes@google.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      6c4d3bc9
    • Linus Torvalds's avatar
      perf,x86: fix wrmsr_on_cpu() warning on suspend/resume · 2a6e06b2
      Linus Torvalds authored
      Commit 1d9d8639 ("perf,x86: fix kernel crash with PEBS/BTS after
      suspend/resume") fixed a crash when doing PEBS performance profiling
      after resuming, but in using init_debug_store_on_cpu() to restore the
      DS_AREA mtrr it also resulted in a new WARN_ON() triggering.
      
      init_debug_store_on_cpu() uses "wrmsr_on_cpu()", which in turn uses CPU
      cross-calls to do the MSR update.  Which is not really valid at the
      early resume stage, and the warning is quite reasonable.  Now, it all
      happens to _work_, for the simple reason that smp_call_function_single()
      ends up just doing the call directly on the CPU when the CPU number
      matches, but we really should just do the wrmsr() directly instead.
      
      This duplicates the wrmsr() logic, but hopefully we can just remove the
      wrmsr_on_cpu() version eventually.
      Reported-and-tested-by: default avatarParag Warudkar <parag.lkml@gmail.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      2a6e06b2
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs · 08637024
      Linus Torvalds authored
      Pull btrfs fixes from Chris Mason:
       "Eric's rcu barrier patch fixes a long standing problem with our
        unmount code hanging on to devices in workqueue helpers.  Liu Bo
        nailed down a difficult assertion for in-memory extent mappings."
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
        Btrfs: fix warning of free_extent_map
        Btrfs: fix warning when creating snapshots
        Btrfs: return as soon as possible when edquot happens
        Btrfs: return EIO if we have extent tree corruption
        btrfs: use rcu_barrier() to wait for bdev puts at unmount
        Btrfs: remove btrfs_try_spin_lock
        Btrfs: get better concurrency for snapshot-aware defrag work
      08637024
  3. 16 Mar, 2013 1 commit
    • Liu Bo's avatar
      Btrfs: fix warning of free_extent_map · 3b277594
      Liu Bo authored
      Users report that an extent map's list is still linked when it's actually
      going to be freed from cache.
      
      The story is that
      
      a) when we're going to drop an extent map and may split this large one into
      smaller ems, and if this large one is flagged as EXTENT_FLAG_LOGGING which means
      that it's on the list to be logged, then the smaller ems split from it will also
      be flagged as EXTENT_FLAG_LOGGING, and this is _not_ expected.
      
      b) we'll keep ems from unlinking the list and freeing when they are flagged with
      EXTENT_FLAG_LOGGING, because the log code holds one reference.
      
      The end result is the warning, but the truth is that we set the flag
      EXTENT_FLAG_LOGGING only during fsync.
      
      So clear flag EXTENT_FLAG_LOGGING for extent maps split from a large one.
      Reported-by: default avatarJohannes Hirte <johannes.hirte@fem.tu-ilmenau.de>
      Reported-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Signed-off-by: default avatarLiu Bo <bo.li.liu@oracle.com>
      Signed-off-by: default avatarChris Mason <chris.mason@fusionio.com>
      3b277594