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From: | Christian Borntraeger |
Subject: | Re: [Qemu-block] [PATCH v2] block: Let bdrv_drain_all() to call aio_poll() for each AioContext |
Date: | Fri, 15 May 2015 09:00:27 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 |
Am 15.05.2015 um 08:59 schrieb Christian Borntraeger: > PS: There is another independent issue now in the kernel when exiting QEMU > caused by Linux kernel commit 6098b45b32e6baeacc04790773ced9340601d511 > Author: Gu Zheng <address@hidden> > AuthorDate: Wed Sep 3 17:45:44 2014 +0800 > Commit: Benjamin LaHaise <address@hidden> > CommitDate: Thu Sep 4 16:54:47 2014 -0400 > > aio: block exit_aio() until all context requests are completed > > A QEMU with 1000 devices will sleep a long time in exit_aio with now obvious > sign of activity as zombie process. I will take care of that.... > > Christian To make it clear. This kernel wait time happens with and without Alexanders patch.
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