From: Paolo Bonzini <pbonzini@redhat.com>
To: qemu-devel@nongnu.org
Cc: fangying1@huawei.com, stefanha@redhat.com
Subject: [RFC PATCH 0/4] async: fix hangs on weakly-ordered architectures
Date: Tue, 7 Apr 2020 10:07:41 -0400 [thread overview]
Message-ID: <20200407140746.8041-1-pbonzini@redhat.com> (raw)
ARM machines and other weakly-ordered architectures have been suffering
for a long time from hangs in qemu-img and qemu-io. For QEMU binaries
these are mitigated by the timers that sooner or later fire in the main
loop, but these will not happen for the tools and probably not with I/O
threads either.
The fix is in patch 5. Patch 1-3 are docs updates that explain the bug,
and patch 4 is a bugfix exposed by the new patch.
Paolo
Paolo Bonzini (5):
atomics: convert to reStructuredText
atomics: update documentation
rcu: do not mention atomic_mb_read/set in documentation
aio-wait: delegate polling of main AioContext if BQL not held
async: use explicit memory barriers
docs/devel/atomics.rst | 501 +++++++++++++++++++++++++++++++++++++++
docs/devel/atomics.txt | 403 -------------------------------
docs/devel/index.rst | 1 +
docs/devel/rcu.txt | 4 +-
include/block/aio-wait.h | 22 ++
include/block/aio.h | 29 +--
util/aio-posix.c | 16 +-
util/aio-win32.c | 17 +-
util/async.c | 16 +-
9 files changed, 576 insertions(+), 433 deletions(-)
create mode 100644 docs/devel/atomics.rst
delete mode 100644 docs/devel/atomics.txt
--
2.18.2
next reply other threads:[~2020-04-07 14:08 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-07 14:07 Paolo Bonzini [this message]
2020-04-07 14:07 ` [PATCH 1/5] atomics: convert to reStructuredText Paolo Bonzini
2020-04-07 16:49 ` Alex Bennée
2020-04-07 14:07 ` [PATCH 2/5] atomics: update documentation Paolo Bonzini
2020-04-07 15:25 ` Richard Henderson
2020-04-07 15:52 ` Paolo Bonzini
2020-04-07 14:07 ` [PATCH 3/5] rcu: do not mention atomic_mb_read/set in documentation Paolo Bonzini
2020-04-07 17:19 ` Richard Henderson
2020-04-07 14:07 ` [PATCH 4/5] aio-wait: delegate polling of main AioContext if BQL not held Paolo Bonzini
2020-04-07 14:07 ` [PATCH 5/5] async: use explicit memory barriers Paolo Bonzini
2020-04-09 6:22 ` Ying Fang
2020-04-08 9:12 ` [RFC PATCH 0/4] async: fix hangs on weakly-ordered architectures Ying Fang
2020-04-08 15:05 ` Paolo Bonzini
2020-04-09 6:54 ` Ying Fang
2020-04-09 15:17 ` Stefan Hajnoczi
-- strict thread matches above, loose matches on Subject: below --
2020-04-06 19:13 Paolo Bonzini
2020-04-07 9:10 ` Stefan Hajnoczi
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