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From: Max Reitz <mreitz@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
	qemu-devel@nongnu.org, Stefan Hajnoczi <stefanha@redhat.com>
Cc: david.edmondson@oracle.com, kwolf@redhat.com, qemu-block@nongnu.org
Subject: Re: [PATCH v5 0/6] coroutine rwlock downgrade fix, minor VDI changes
Date: Wed, 24 Mar 2021 15:26:00 +0100	[thread overview]
Message-ID: <712353c7-ee20-6dc7-b001-903de9d6e4f3@redhat.com> (raw)
In-Reply-To: <20210317180013.235231-1-pbonzini@redhat.com>

On 17.03.21 19:00, Paolo Bonzini wrote:
> This is a resubmit of David Edmondson's series at
> https://patchew.org/QEMU/20210309144015.557477-1-david.edmondson@oracle.com/.
> After closer analysis on IRC, the CoRwlock's attempt to ensure
> fairness turned out to be flawed.  Therefore, this series
> reimplements CoRwlock without using a CoQueue.  Tracking whether
> each queued coroutine is a reader/writer makes it possible to
> never wake a writer when only readers should be allowed and
> vice versa.

I’m not a maintainer for patches 3 through 6.  Stefan is, though.  So 
Stefan, can you take this series with an R-b from me on 1 and 2?

Max



  parent reply	other threads:[~2021-03-24 14:28 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-17 18:00 [PATCH v5 0/6] coroutine rwlock downgrade fix, minor VDI changes Paolo Bonzini
2021-03-17 18:00 ` [PATCH 1/6] block/vdi: When writing new bmap entry fails, don't leak the buffer Paolo Bonzini
2021-03-24 14:25   ` Max Reitz
2021-03-17 18:00 ` [PATCH 2/6] block/vdi: Don't assume that blocks are larger than VdiHeader Paolo Bonzini
2021-03-24 14:25   ` Max Reitz
2021-03-17 18:00 ` [PATCH 3/6] coroutine/mutex: Store the coroutine in the CoWaitRecord only once Paolo Bonzini
2021-03-17 18:00 ` [PATCH 4/6] coroutine-lock: reimplement CoRwlock to fix downgrade bug Paolo Bonzini
2021-03-24 16:15   ` Stefan Hajnoczi
2021-03-24 16:40     ` Paolo Bonzini
2021-03-17 18:00 ` [PATCH 5/6] test-coroutine: add rwlock upgrade test Paolo Bonzini
2021-03-17 18:19   ` David Edmondson
2021-03-17 18:00 ` [PATCH 6/6] test-coroutine: Add rwlock downgrade test Paolo Bonzini
2021-03-24 14:26 ` Max Reitz [this message]
2021-03-24 16:23 ` [PATCH v5 0/6] coroutine rwlock downgrade fix, minor VDI changes Stefan Hajnoczi
2021-03-24 16:43   ` Paolo Bonzini

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