From: Paolo Bonzini <pbonzini@redhat.com>
To: Fam Zheng <famz@redhat.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>,
qemu-devel@nongnu.org, Alberto Garcia <berto@igalia.com>,
qemu-block@nongnu.org
Subject: Re: [Qemu-devel] [PATCH] aio-posix: honor is_external in AioContext polling
Date: Tue, 24 Jan 2017 13:51:33 +0100 [thread overview]
Message-ID: <09a28062-5f21-7922-a945-6d4ec9fad5c9@redhat.com> (raw)
In-Reply-To: <20170124124719.GG27126@lemon.Home>
On 24/01/2017 13:47, Fam Zheng wrote:
>> I'm not sure I understand why this is related. aio_poll() only tries
>> poll mode once, so bdrv_flush would only spin until the fsync is complete.
>
> Right, I was confused. The problematic ones are "drain" style ones that tracks
> a inflight counter. The only suspecious one is in v9fs_reset(), otherwise we are
> safe!
And v9fs_reset in turn is fine because it doesn't use
virtio_queue_aio_set_host_notifier_handler (so it goes to
event_notifier_set_handler and then iohandler_ctx, not
qemu_get_aio_context()).
Paolo
next prev parent reply other threads:[~2017-01-24 12:51 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-24 9:53 [Qemu-devel] [PATCH] aio-posix: honor is_external in AioContext polling Stefan Hajnoczi
2017-01-24 12:04 ` Fam Zheng
2017-01-24 12:15 ` Paolo Bonzini
2017-01-24 12:47 ` Fam Zheng
2017-01-24 12:51 ` Paolo Bonzini [this message]
2017-01-24 13:40 ` Fam Zheng
2017-01-24 14:31 ` Alberto Garcia
2017-01-25 13:16 ` Stefan Hajnoczi
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