1. 08 6月, 2012 4 次提交
  2. 07 6月, 2012 9 次提交
  3. 06 6月, 2012 6 次提交
  4. 05 6月, 2012 19 次提交
  5. 04 6月, 2012 2 次提交
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      drop_monitor: dont sleep in atomic context · bec4596b
      Eric Dumazet 提交于
      drop_monitor calls several sleeping functions while in atomic context.
      
       BUG: sleeping function called from invalid context at mm/slub.c:943
       in_atomic(): 1, irqs_disabled(): 0, pid: 2103, name: kworker/0:2
       Pid: 2103, comm: kworker/0:2 Not tainted 3.5.0-rc1+ #55
       Call Trace:
        [<ffffffff810697ca>] __might_sleep+0xca/0xf0
        [<ffffffff811345a3>] kmem_cache_alloc_node+0x1b3/0x1c0
        [<ffffffff8105578c>] ? queue_delayed_work_on+0x11c/0x130
        [<ffffffff815343fb>] __alloc_skb+0x4b/0x230
        [<ffffffffa00b0360>] ? reset_per_cpu_data+0x160/0x160 [drop_monitor]
        [<ffffffffa00b022f>] reset_per_cpu_data+0x2f/0x160 [drop_monitor]
        [<ffffffffa00b03ab>] send_dm_alert+0x4b/0xb0 [drop_monitor]
        [<ffffffff810568e0>] process_one_work+0x130/0x4c0
        [<ffffffff81058249>] worker_thread+0x159/0x360
        [<ffffffff810580f0>] ? manage_workers.isra.27+0x240/0x240
        [<ffffffff8105d403>] kthread+0x93/0xa0
        [<ffffffff816be6d4>] kernel_thread_helper+0x4/0x10
        [<ffffffff8105d370>] ? kthread_freezable_should_stop+0x80/0x80
        [<ffffffff816be6d0>] ? gs_change+0xb/0xb
      
      Rework the logic to call the sleeping functions in right context.
      
      Use standard timer/workqueue api to let system chose any cpu to perform
      the allocation and netlink send.
      
      Also avoid a loop if reset_per_cpu_data() cannot allocate memory :
      use mod_timer() to wait 1/10 second before next try.
      Signed-off-by: NEric Dumazet <edumazet@google.com>
      Cc: Neil Horman <nhorman@tuxdriver.com>
      Reviewed-by: NNeil Horman <nhorman@tuxdriver.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      bec4596b