From: Stefan Hajnoczi <stefanha@redhat.com>
To: qemu-devel@nongnu.org
Cc: qemu-block@nongnu.org, Paolo Bonzini <pbonzini@redhat.com>,
Kevin Wolf <kwolf@redhat.com>, Fam Zheng <famz@redhat.com>,
Stefan Hajnoczi <stefanha@redhat.com>
Subject: [Qemu-devel] [PATCH v3 0/4] block: fix 'savevm' hang with -object iothread
Date: Mon, 22 May 2017 14:57:00 +0100 [thread overview]
Message-ID: <20170522135704.842-1-stefanha@redhat.com> (raw)
v3:
* Add missing bdrv_drain_all_end() in error code paths [Kevin]
v2:
* New patch to use bdrv_drain_all_begin/end() in savevm/loadvm [Kevin]
(All other patches unchanged)
The 'savevm' command hangs when -object iothread is used. See patches for
details, but basically the vmstate read/write code didn't conform to the latest
block layer locking rules.
Stefan Hajnoczi (4):
block: count bdrv_co_rw_vmstate() requests
block: use BDRV_POLL_WHILE() in bdrv_rw_vmstate()
migration: avoid recursive AioContext locking in save_vmstate()
migration: use bdrv_drain_all_begin/end() instead bdrv_drain_all()
block/io.c | 21 +++++++++++++--------
migration/savevm.c | 30 ++++++++++++++++++++++++++----
2 files changed, 39 insertions(+), 12 deletions(-)
--
2.9.3
next reply other threads:[~2017-05-22 13:57 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-22 13:57 Stefan Hajnoczi [this message]
2017-05-22 13:57 ` [Qemu-devel] [PATCH v3 1/4] block: count bdrv_co_rw_vmstate() requests Stefan Hajnoczi
2017-05-22 13:57 ` [Qemu-devel] [PATCH v3 2/4] block: use BDRV_POLL_WHILE() in bdrv_rw_vmstate() Stefan Hajnoczi
2017-05-22 13:57 ` [Qemu-devel] [PATCH v3 3/4] migration: avoid recursive AioContext locking in save_vmstate() Stefan Hajnoczi
2017-06-14 10:10 ` Pavel Butsykin
2017-06-14 13:15 ` Pavel Butsykin
2017-06-14 14:43 ` Kevin Wolf
2017-06-15 13:33 ` Pavel Butsykin
2017-05-22 13:57 ` [Qemu-devel] [PATCH v3 4/4] migration: use bdrv_drain_all_begin/end() instead bdrv_drain_all() Stefan Hajnoczi
2017-05-22 17:40 ` Eric Blake
2017-05-30 13:52 ` [Qemu-devel] [Qemu-block] [PATCH v3 0/4] block: fix 'savevm' hang with -object iothread Stefan Hajnoczi
2017-06-12 13:47 ` Stefan Hajnoczi
2017-06-13 12:14 ` Kevin Wolf
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