1. 05 Dec, 2011 19 commits
  2. 04 Dec, 2011 1 commit
    • Linus Torvalds's avatar
      x86: Fix boot failures on older AMD CPU's · 8e8da023
      Linus Torvalds authored
      People with old AMD chips are getting hung boots, because commit
      bcb80e53 ("x86, microcode, AMD: Add microcode revision to
      /proc/cpuinfo") moved the microcode detection too early into
      "early_init_amd()".
      
      At that point we are *so* early in the booth that the exception tables
      haven't even been set up yet, so the whole
      
      	rdmsr_safe(MSR_AMD64_PATCH_LEVEL, &c->microcode, &dummy);
      
      doesn't actually work: if the rdmsr does a GP fault (due to non-existant
      MSR register on older CPU's), we can't fix it up yet, and the boot fails.
      
      Fix it by simply moving the code to a slightly later point in the boot
      (init_amd() instead of early_init_amd()), since the kernel itself
      doesn't even really care about the microcode patchlevel at this point
      (or really ever: it's made available to user space in /proc/cpuinfo, and
      updated if you do a microcode load).
      Reported-tested-and-bisected-by: default avatarLarry Finger <Larry.Finger@lwfinger.net>
      Tested-by: default avatarBob Tracy <rct@gherkin.frus.com>
      Acked-by: default avatarBorislav Petkov <borislav.petkov@amd.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      8e8da023
  3. 03 Dec, 2011 1 commit
    • Konrad Rzeszutek Wilk's avatar
      xen/pm_idle: Make pm_idle be default_idle under Xen. · e5fd47bf
      Konrad Rzeszutek Wilk authored
      The idea behind commit d91ee586 ("cpuidle: replace xen access to x86
      pm_idle and default_idle") was to have one call - disable_cpuidle()
      which would make pm_idle not be molested by other code.  It disallows
      cpuidle_idle_call to be set to pm_idle (which is excellent).
      
      But in the select_idle_routine() and idle_setup(), the pm_idle can still
      be set to either: amd_e400_idle, mwait_idle or default_idle.  This
      depends on some CPU flags (MWAIT) and in AMD case on the type of CPU.
      
      In case of mwait_idle we can hit some instances where the hypervisor
      (Amazon EC2 specifically) sets the MWAIT and we get:
      
        Brought up 2 CPUs
        invalid opcode: 0000 [#1] SMP
      
        Pid: 0, comm: swapper Not tainted 3.1.0-0.rc6.git0.3.fc16.x86_64 #1
        RIP: e030:[<ffffffff81015d1d>]  [<ffffffff81015d1d>] mwait_idle+0x6f/0xb4
        ...
        Call Trace:
         [<ffffffff8100e2ed>] cpu_idle+0xae/0xe8
         [<ffffffff8149ee78>] cpu_bringup_and_idle+0xe/0x10
        RIP  [<ffffffff81015d1d>] mwait_idle+0x6f/0xb4
         RSP <ffff8801d28ddf10>
      
      In the case of amd_e400_idle we don't get so spectacular crashes, but we
      do end up making an MSR which is trapped in the hypervisor, and then
      follow it up with a yield hypercall.  Meaning we end up going to
      hypervisor twice instead of just once.
      
      The previous behavior before v3.0 was that pm_idle was set to
      default_idle regardless of select_idle_routine/idle_setup.
      
      We want to do that, but only for one specific case: Xen.  This patch
      does that.
      
      Fixes RH BZ #739499 and Ubuntu #881076
      Reported-by: default avatarStefan Bader <stefan.bader@canonical.com>
      Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      e5fd47bf
  4. 02 Dec, 2011 14 commits
  5. 01 Dec, 2011 5 commits
    • Linus Torvalds's avatar
      Linux 3.2-rc4 · 5611cc45
      Linus Torvalds authored
      5611cc45
    • Linus Torvalds's avatar
      Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2 · 0a4ebed7
      Linus Torvalds authored
      * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2: (31 commits)
        ocfs2: avoid unaligned access to dqc_bitmap
        ocfs2: Use filemap_write_and_wait() instead of write_inode_now()
        ocfs2: honor O_(D)SYNC flag in fallocate
        ocfs2: Add a missing journal credit in ocfs2_link_credits() -v2
        ocfs2: send correct UUID to cleancache initialization
        ocfs2: Commit transactions in error cases -v2
        ocfs2: make direntry invalid when deleting it
        fs/ocfs2/dlm/dlmlock.c: free kmem_cache_zalloc'd data using kmem_cache_free
        ocfs2: Avoid livelock in ocfs2_readpage()
        ocfs2: serialize unaligned aio
        ocfs2: Implement llseek()
        ocfs2: Fix ocfs2_page_mkwrite()
        ocfs2: Add comment about orphan scanning
        ocfs2: Clean up messages in the fs
        ocfs2/cluster: Cluster up now includes network connections too
        ocfs2/cluster: Add new function o2net_fill_node_map()
        ocfs2/cluster: Fix output in file elapsed_time_in_ms
        ocfs2/dlm: dlmlock_remote() needs to account for remastery
        ocfs2/dlm: Take inflight reference count for remotely mastered resources too
        ocfs2/dlm: Cleanup dlm_wait_for_node_death() and dlm_wait_for_node_recovery()
        ...
      0a4ebed7
    • Akinobu Mita's avatar
      ocfs2: avoid unaligned access to dqc_bitmap · 93925579
      Akinobu Mita authored
      The dqc_bitmap field of struct ocfs2_local_disk_chunk is 32-bit aligned,
      but not 64-bit aligned.  The dqc_bitmap is accessed by ocfs2_set_bit(),
      ocfs2_clear_bit(), ocfs2_test_bit(), or ocfs2_find_next_zero_bit().  These
      are wrapper macros for ext2_*_bit() which need to take an unsigned long
      aligned address (though some architectures are able to handle unaligned
      address correctly)
      
      So some 64bit architectures may not be able to access the dqc_bitmap
      correctly.
      
      This avoids such unaligned access by using another wrapper functions for
      ext2_*_bit().  The code is taken from fs/ext4/mballoc.c which also need to
      handle unaligned bitmap access.
      Signed-off-by: default avatarAkinobu Mita <akinobu.mita@gmail.com>
      Acked-by: default avatarJoel Becker <jlbec@evilplan.org>
      Cc: Mark Fasheh <mfasheh@suse.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarJoel Becker <jlbec@evilplan.org>
      93925579
    • Linus Torvalds's avatar
      Merge branch 'fixes' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm · 3b120ab7
      Linus Torvalds authored
      * 'fixes' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm:
        ARM: 7182/1: ARM cpu topology: fix warning
        ARM: 7181/1: Restrict kprobes probing SWP instructions to ARMv5 and below
        ARM: 7180/1: Change kprobes testcase with unpredictable STRD instruction
        ARM: 7177/1: GIC: avoid skipping non-existent PPIs in irq_start calculation
        ARM: 7176/1: cpu_pm: register GIC PM notifier only once
        ARM: 7175/1: add subname parameter to mfp_set_groupg callers
        ARM: 7174/1: Fix build error in kprobes test code on Thumb2 kernels
        ARM: 7172/1: dma: Drop GFP_COMP for DMA memory allocations
        ARM: 7171/1: unwind: add unwind directives to bitops assembly macros
        ARM: 7170/2: fix compilation breakage in entry-armv.S
        ARM: 7168/1: use cache type functions for arch_get_unmapped_area
        ARM: perf: check that we have a platform device when reserving PMU
        ARM: 7166/1: Use PMD_SHIFT instead of PGDIR_SHIFT in dma-consistent.c
        ARM: 7165/2: PL330: Fix typo in _prepare_ccr()
        ARM: 7163/2: PL330: Only register usable channels
        ARM: 7162/1: errata: tidy up Kconfig options for PL310 errata workarounds
        ARM: 7161/1: errata: no automatic store buffer drain
        ARM: perf: initialise used_mask for fake PMU during validation
        ARM: PMU: remove pmu_init declaration
        ARM: PMU: re-export release_pmu symbol to modules
      3b120ab7
    • David S. Miller's avatar
      Revert "udp: remove redundant variable" · 59c2cdae
      David S. Miller authored
      This reverts commit 81d54ec8.
      
      If we take the "try_again" goto, due to a checksum error,
      the 'len' has already been truncated.  So we won't compute
      the same values as the original code did.
      Reported-by: default avatarpaul bilke <fsmail@conspiracy.net>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      59c2cdae