1. 02 12月, 2011 15 次提交
  2. 01 12月, 2011 18 次提交
  3. 30 11月, 2011 6 次提交
    • R
      a493f1a2
    • L
      Merge branch 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 8cd79203
      Linus Torvalds 提交于
      * 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        PM: Update comments describing device power management callbacks
        PM / Sleep: Update documentation related to system wakeup
        PM / Runtime: Make documentation follow the new behavior of irq_safe
        PM / Sleep: Correct inaccurate information in devices.txt
        PM / Domains: Document how PM domains are used by the PM core
        PM / Hibernate: Do not leak memory in error/test code paths
      8cd79203
    • E
      IB: Fix RCU lockdep splats · 580da35a
      Eric Dumazet 提交于
      Commit f2c31e32 ("net: fix NULL dereferences in check_peer_redir()")
      forgot to take care of infiniband uses of dst neighbours.
      
      Many thanks to Marc Aurele who provided a nice bug report and feedback.
      Reported-by: NMarc Aurele La France <tsi@ualberta.ca>
      Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
      Cc: David Miller <davem@davemloft.net>
      Cc: <stable@kernel.org>
      Signed-off-by: NRoland Dreier <roland@purestorage.com>
      580da35a
    • M
      IB/ipoib: Prevent hung task or softlockup processing multicast response · 3874397c
      Mike Marciniszyn 提交于
      This following can occur with ipoib when processing a multicast reponse:
      
          BUG: soft lockup - CPU#0 stuck for 67s! [ib_mad1:982]
          Modules linked in: ...
          CPU 0:
          Modules linked in: ...
          Pid: 982, comm: ib_mad1 Not tainted 2.6.32-131.0.15.el6.x86_64 #1 ProLiant DL160 G5
          RIP: 0010:[<ffffffff814ddb27>]  [<ffffffff814ddb27>] _spin_unlock_irqrestore+0x17/0x20
          RSP: 0018:ffff8802119ed860  EFLAGS: 00000246
          0000000000000004 RBX: ffff8802119ed860 RCX: 000000000000a299
          RDX: ffff88021086c700 RSI: 0000000000000246 RDI: 0000000000000246
          RBP: ffffffff8100bc8e R08: ffff880210ac229c R09: 0000000000000000
          R10: ffff88021278aab8 R11: 0000000000000000 R12: ffff8802119ed860
          R13: ffffffff8100be6e R14: 0000000000000001 R15: 0000000000000003
          FS:  0000000000000000(0000) GS:ffff880028200000(0000) knlGS:0000000000000000
          CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
          CR2: 00000000006d4840 CR3: 0000000209aa5000 CR4: 00000000000406f0
          DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
          DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
          Call Trace:
          [<ffffffffa032c247>] ? ipoib_mcast_send+0x157/0x480 [ib_ipoib]
          [<ffffffff8100bc8e>] ? apic_timer_interrupt+0xe/0x20
          [<ffffffff8100bc8e>] ? apic_timer_interrupt+0xe/0x20
          [<ffffffffa03283d4>] ? ipoib_path_lookup+0x124/0x2d0 [ib_ipoib]
          [<ffffffffa03286fc>] ? ipoib_start_xmit+0x17c/0x430 [ib_ipoib]
          [<ffffffff8141e758>] ? dev_hard_start_xmit+0x2c8/0x3f0
          [<ffffffff81439d0a>] ? sch_direct_xmit+0x15a/0x1c0
          [<ffffffff81423098>] ? dev_queue_xmit+0x388/0x4d0
          [<ffffffffa032d6b7>] ? ipoib_mcast_join_finish+0x2c7/0x510 [ib_ipoib]
          [<ffffffffa032dab8>] ? ipoib_mcast_sendonly_join_complete+0x1b8/0x1f0 [ib_ipoib]
          [<ffffffffa02a0946>] ? mcast_work_handler+0x1a6/0x710 [ib_sa]
          [<ffffffffa015f01e>] ? ib_send_mad+0xfe/0x3c0 [ib_mad]
          [<ffffffffa00f6c93>] ? ib_get_cached_lmc+0xa3/0xb0 [ib_core]
          [<ffffffffa02a0f9b>] ? join_handler+0xeb/0x200 [ib_sa]
          [<ffffffffa029e4fc>] ? ib_sa_mcmember_rec_callback+0x5c/0xa0 [ib_sa]
          [<ffffffffa029e79c>] ? recv_handler+0x3c/0x70 [ib_sa]
          [<ffffffffa01603a4>] ? ib_mad_completion_handler+0x844/0x9d0 [ib_mad]
          [<ffffffffa015fb60>] ? ib_mad_completion_handler+0x0/0x9d0 [ib_mad]
          [<ffffffff81088830>] ? worker_thread+0x170/0x2a0
          [<ffffffff8108e160>] ? autoremove_wake_function+0x0/0x40
          [<ffffffff810886c0>] ? worker_thread+0x0/0x2a0
          [<ffffffff8108ddf6>] ? kthread+0x96/0xa0
          [<ffffffff8100c1ca>] ? child_rip+0xa/0x20
      
      Coinciding with stack trace is the following message:
      
          ib0: ib_address_create failed
      
      The code below in ipoib_mcast_join_finish() will note the above
      failure in the address handle but otherwise continue:
      
                      ah = ipoib_create_ah(dev, priv->pd, &av);
                      if (!ah) {
                              ipoib_warn(priv, "ib_address_create failed\n");
                      } else {
      
      The while loop at the bottom of ipoib_mcast_join_finish() will attempt
      to send queued multicast packets in mcast->pkt_queue and eventually
      end up in ipoib_mcast_send():
      
              if (!mcast->ah) {
                      if (skb_queue_len(&mcast->pkt_queue) < IPOIB_MAX_MCAST_QUEUE)
                              skb_queue_tail(&mcast->pkt_queue, skb);
                      else {
                              ++dev->stats.tx_dropped;
                              dev_kfree_skb_any(skb);
                      }
      
      My read is that the code will requeue the packet and return to the
      ipoib_mcast_join_finish() while loop and the stage is set for the
      "hung" task diagnostic as the while loop never sees a non-NULL ah, and
      will do nothing to resolve.
      
      There are GFP_ATOMIC allocates in the provider routines, so this is
      possible and should be dealt with.
      
      The test that induced the failure is associated with a host SM on the
      same server during a shutdown.
      
      This patch causes ipoib_mcast_join_finish() to exit with an error
      which will flush the queued mcast packets.  Nothing is done to unwind
      the QP attached state so that subsequent sends from above will retry
      the join.
      Reviewed-by: NRam Vepa <ram.vepa@qlogic.com>
      Reviewed-by: NGary Leshner <gary.leshner@qlogic.com>
      Signed-off-by: NMike Marciniszyn <mike.marciniszyn@qlogic.com>
      Signed-off-by: NRoland Dreier <roland@purestorage.com>
      3874397c
    • L
      Merge branch 'slab/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux · 57db53b0
      Linus Torvalds 提交于
      * 'slab/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux:
        slub: avoid potential NULL dereference or corruption
        slub: use irqsafe_cpu_cmpxchg for put_cpu_partial
        slub: move discard_slab out of node lock
        slub: use correct parameter to add a page to partial list tail
      57db53b0
    • L
      Merge branch 'dev' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 · 883381d9
      Linus Torvalds 提交于
      * 'dev' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
        ext4: fix racy use-after-free in ext4_end_io_dio()
      883381d9
  4. 29 11月, 2011 1 次提交