1. 30 10月, 2013 2 次提交
  2. 18 10月, 2013 2 次提交
    • T
      ext4: add ratelimiting to ext4 messages · efbed4dc
      Theodore Ts'o 提交于
      In the case of a storage device that suddenly disappears, or in the
      case of significant file system corruption, this can result in a huge
      flood of messages being sent to the console.  This can overflow the
      file system containing /var/log/messages, or if a serial console is
      configured, this can slow down the system so much that a hardware
      watchdog can end up triggering forcing a system reboot.
      
      Google-Bug-Id: 7258357
      Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
      efbed4dc
    • M
      ext4: fix performance regression in ext4_writepages · aeac589a
      Ming Lei 提交于
      Commit 4e7ea81d(ext4: restructure writeback path) introduces another
      performance regression on random write:
      
      - one more page may be added to ext4 extent in
        mpage_prepare_extent_to_map, and will be submitted for I/O so
        nr_to_write will become -1 before 'done' is set
      
      - the worse thing is that dirty pages may still be retrieved from page
        cache after nr_to_write becomes negative, so lots of small chunks
        can be submitted to block device when page writeback is catching up
        with write path, and performance is hurted.
      
      On one arm A15 board with sata 3.0 SSD(CPU: 1.5GHz dura core, RAM:
      2GB, SATA controller: 3.0Gbps), this patch can improve below test's
      result from 157MB/sec to 174MB/sec(>10%):
      
      	dd if=/dev/zero of=./z.img bs=8K count=512K
      
      The above test is actually prototype of block write in bonnie++
      utility.
      
      This patch makes sure no more pages than nr_to_write can be added to
      extent for mapping, so that nr_to_write won't become negative.
      
      Cc: linux-ext4@vger.kernel.org
      Acked-by: NJan Kara <jack@suse.cz>
      Signed-off-by: NMing Lei <ming.lei@canonical.com>
      Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
      aeac589a
  3. 16 10月, 2013 2 次提交
  4. 14 10月, 2013 10 次提交
  5. 13 10月, 2013 16 次提交
  6. 12 10月, 2013 3 次提交
    • V
      ARC: Ignore ptrace SETREGSET request for synthetic register "stop_pc" · 5b242828
      Vineet Gupta 提交于
      ARCompact TRAP_S insn used for breakpoints, commits before exception is
      taken (updating architectural PC). So ptregs->ret contains next-PC and
      not the breakpoint PC itself. This is different from other restartable
      exceptions such as TLB Miss where ptregs->ret has exact faulting PC.
      gdb needs to know exact-PC hence ARC ptrace GETREGSET provides for
      @stop_pc which returns ptregs->ret vs. EFA depending on the
      situation.
      
      However, writing stop_pc (SETREGSET request), which updates ptregs->ret
      doesn't makes sense stop_pc doesn't always correspond to that reg as
      described above.
      
      This was not an issue so far since user_regs->ret / user_regs->stop_pc
      had same value and both writing to ptregs->ret was OK, needless, but NOT
      broken, hence not observed.
      
      With gdb "jump", they diverge, and user_regs->ret updating ptregs is
      overwritten immediately with stop_pc, which this patch fixes.
      Reported-by: NAnton Kolesov <akolesov@synopsys.com>
      Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
      5b242828
    • L
      Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus · 46f37519
      Linus Torvalds 提交于
      Pull MIPS fix from Ralf Baechle:
       "Just one fix.  The stack protector was loading the value of the canary
        instead of its address"
      
      * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
        MIPS: stack protector: Fix per-task canary switch
      46f37519
    • L
      Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux · cd4edf7a
      Linus Torvalds 提交于
      Pull drm fixes from Dave Airlie:
       "All over the map..
      
         - nouveau:
           disable MSI, needs more work, will try again next merge window
         - radeon:
            audio + uvd regression fixes, dpm fixes, reset fixes
         - i915:
           the dpms fix might fix your haswell
      
        And one pain in the ass revert, so we have VGA arbitration that when
        implemented 4-5 years ago really hoped that GPUs could remove
        themselves from arbitration completely once they had a kernel driver.
      
        It seems Intel hw designers decided that was too nice a facility to
        allow us to have so they removed it when they went on-die (so since
        Ironlake at least).  Now Alex Williamson added support for VGA
        arbitration for newer GPUs however this now exposes itself to
        userspace as requireing arbitration of GPU VGA regions and the X
        server gets involved and disables things that it can't handle when VGA
        access is possibly required around every operation.
      
        So in order to not break userspace we just reverted things back to the
        old known broken status so maybe we can try and design out way out.
      
        Ville also had a patch to use stop machine for the two times Intel
        needs to access VGA space, that might be acceptable with some rework,
        but for now myself and Daniel agreed to just go back"
      
      * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (23 commits)
        Revert "i915: Update VGA arbiter support for newer devices"
        Revert "drm/i915: Delay disabling of VGA memory until vgacon->fbcon handoff is done"
        drm/radeon: re-enable sw ACR support on pre-DCE4
        drm/radeon/dpm: disable bapm on TN asics
        drm/radeon: improve soft reset on CIK
        drm/radeon: improve soft reset on SI
        drm/radeon/dpm: off by one in si_set_mc_special_registers()
        drm/radeon/dpm/btc: off by one in btc_set_mc_special_registers()
        drm/radeon: forever loop on error in radeon_do_test_moves()
        drm/radeon: fix hw contexts for SUMO2 asics
        drm/radeon: fix typo in CP DMA register headers
        drm/radeon/dpm: disable multiple UVD states
        drm/radeon: use hw generated CTS/N values for audio
        drm/radeon: fix N/CTS clock matching for audio
        drm/radeon: use 64-bit math to calculate CTS values for audio (v2)
        drm/edid: catch kmalloc failure in drm_edid_to_speaker_allocation
        Revert "drm/fb-helper: don't sleep for screen unblank when an oops is in progress"
        drm/gma500: fix things after get/put page helpers
        drm/nouveau/mc: disable msi support by default, it's busted in tons of places
        drm/i915: Only apply DPMS to the encoder if enabled
        ...
      cd4edf7a
  7. 11 10月, 2013 5 次提交