On Mon, Apr 28, 2014 at 04:35:38PM +0100, Nix wrote:
> /proc/$pid/stack of the two communicating ssh daemons was instructive:
> 
> [<ffffffff814e3512>] unix_wait_for_peer+0x9f/0xbc
> [<ffffffff814e5d48>] unix_dgram_sendmsg+0x41b/0x534

This one is a dgram socket...

> [<ffffffff8146618f>] sock_sendmsg+0x84/0x9e
> [<ffffffff81467f3d>] SyS_sendto+0x10e/0x13f
> [<ffffffff815770e2>] system_call_fastpath+0x16/0x1b
> [<ffffffffffffffff>] 0xffffffffffffffff
> spindle:/var/log.real/by-facility# cat /proc/5941/stack
> [<ffffffff814e493a>] unix_stream_recvmsg+0x289/0x6d5

...and that's a stream receiver.

> [<ffffffff814673e0>] sock_aio_read.part.12+0xf0/0xff
> [<ffffffff8146740b>] sock_aio_read+0x1c/0x28
> [<ffffffff811388fd>] do_sync_read+0x59/0x78
> [<ffffffff81138d8b>] vfs_read+0xa2/0x13f
> [<ffffffff81139699>] SyS_read+0x47/0x8b
> [<ffffffff81577259>] tracesys+0xd0/0xd5
> [<ffffffffffffffff>] 0xffffffffffffffff

Are you sure those are the communicating tasks?

Bye,

  Hannes

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