[ovs-dev] [PATCH] datapath: remove flow member from struct ovs_skb_cb

Joe Stringer joestringer at nicira.com
Wed Aug 27 23:11:21 UTC 2014


On 28 August 2014 10:34, Pravin Shelar <pshelar at nicira.com> wrote:

> <snip>
>
> This is weird. I could not reproduce this on newer kernel. But I found
> related bug. Can you try attached patch? It may be related.
> I will submit formal patch later.
>
> --Pravin.
>

This patch doesn't fix the issue.

Another slight variation I've seen in dmesg:

[19921.489585] INFO: task revalidator11:11397 blocked for more than 120
seconds.
[19921.489596] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[19921.489607] revalidator11   D ffff88011fd13780     0 11397      1
0x00000000
[19921.489621]  ffff88011805f080 0000000000000086 ffff880000000000
ffff88011aec4780
[19921.489635]  0000000000013780 ffff880107b35fd8 ffff880107b35fd8
ffff88011805f080
[19921.489649]  ffff880107b35ab8 0000000100000286 ffffffff8135049f
ffffffff8165c0f0
[19921.489663] Call Trace:
[19921.489677]  [<ffffffff8135049f>] ? _raw_spin_unlock_irqrestore+0xe/0xf
[19921.489691]  [<ffffffff8134fa44>] ? __mutex_lock_common.isra.5+0xff/0x164
[19921.489704]  [<ffffffff8134f932>] ? mutex_lock+0x1a/0x2d
[19921.489719]  [<ffffffff812af40c>] ? netlink_trim+0x13/0x7a
[19921.489733]  [<ffffffff812b1178>] ? genl_rcv+0xe/0x28
[19921.489748]  [<ffffffff812b0929>] ? netlink_unicast+0xe6/0x14e
[19921.489763]  [<ffffffff812b0c05>] ? netlink_sendmsg+0x274/0x2ac
[19921.489775]  [<ffffffff81108b29>] ? __pollwait+0xce/0xce
[19921.489789]  [<ffffffff81280011>] ? sock_sendmsg+0xc1/0xde
[19921.489802]  [<ffffffff81108b29>] ? __pollwait+0xce/0xce
[19921.489816]  [<ffffffff8104b2ce>] ? current_fs_time+0x31/0x37
[19921.489831]  [<ffffffff8110ce69>] ? file_update_time+0xda/0x105
[19921.489844]  [<ffffffff8134f144>] ? _cond_resched+0x7/0x1c
[19921.489997]  [<ffffffff81036628>] ? should_resched+0x5/0x23
[19921.490015]  [<ffffffff8134f144>] ? _cond_resched+0x7/0x1c
[19921.490031]  [<ffffffff812894a8>] ? copy_from_user+0x18/0x30
[19921.490043]  [<ffffffff81036628>] ? should_resched+0x5/0x23
[19921.490060]  [<ffffffff812802c7>] ? ___sys_sendmsg+0x209/0x2a9
[19921.490076]  [<ffffffff810fa820>] ? do_sync_read+0xb4/0xec
[19921.490091]  [<ffffffff810fc0b3>] ? fget_light+0x67/0x7b
[19921.490105]  [<ffffffff81281c37>] ? __sys_sendmsg+0x39/0x58
[19921.490120]  [<ffffffff81355452>] ? system_call_fastpath+0x16/0x1b



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