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Re: [Qemu-devel] [PATCH 00/17] aio_context_acquire/release pushdown, par
From: |
Daniel P. Berrange |
Subject: |
Re: [Qemu-devel] [PATCH 00/17] aio_context_acquire/release pushdown, part 2 |
Date: |
Tue, 24 Jan 2017 09:38:40 +0000 |
User-agent: |
Mutt/1.7.1 (2016-10-04) |
On Fri, Jan 20, 2017 at 05:43:05PM +0100, Paolo Bonzini wrote:
> This series pushes down aio_context_acquire/release to the point
> where we can actually reason on using different fine-grained mutexes.
>
> The main infrastructure is introduced in patch 1. The new API aio_co_wake
> starts a coroutine with aio_context_acquire/release protection, which
> requires tracking each coroutine's "home" AioContext. aio_co_schedule
> instead takes care of moving a sleeping coroutine to a different
> AioContext, also ensuring that it runs under aio_context_acquire/release.
> This is useful to implement bdrv_set_aio_context, as a simpler alternative
> to bottom halves. Even though one-shot BHs are already simpler than
> what we had before, after this patch aio_co_wake and aio_co_schedule
> save you from having to do aio_context_acquire/release explicitly.
>
> After patch 2 to 4, which are just small preparatory changes, patches
> 5 to 8 provide an example of how to use the new API. In particular patch
> 5 to 7 implement a new organization of coroutines in the NBD client,
> which allows not blocking on partial reply header reads.
FYI, I added my S-o-B to the two io: patches, so when this series is ready
just include them in your main pull request - no need for me to take those
io: patches separately.
Regards,
Daniel
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- [Qemu-devel] [PATCH 07/17] nbd: convert to use qio_channel_yield, (continued)
- [Qemu-devel] [PATCH 07/17] nbd: convert to use qio_channel_yield, Paolo Bonzini, 2017/01/20
- [Qemu-devel] [PATCH 09/17] qed: introduce qed_aio_start_io and qed_aio_next_io_cb, Paolo Bonzini, 2017/01/20
- [Qemu-devel] [PATCH 10/17] aio: push aio_context_acquire/release down to dispatching, Paolo Bonzini, 2017/01/20
- [Qemu-devel] [PATCH 11/17] block: explicitly acquire aiocontext in timers that need it, Paolo Bonzini, 2017/01/20
- [Qemu-devel] [PATCH 15/17] aio-posix: partially inline aio_dispatch into aio_poll, Paolo Bonzini, 2017/01/20
- [Qemu-devel] [PATCH 13/17] block: explicitly acquire aiocontext in bottom halves that need it, Paolo Bonzini, 2017/01/20
- [Qemu-devel] [PATCH 14/17] block: explicitly acquire aiocontext in aio callbacks that need it, Paolo Bonzini, 2017/01/20
- [Qemu-devel] [PATCH 17/17] block: document fields protected by AioContext lock, Paolo Bonzini, 2017/01/20
- [Qemu-devel] [PATCH 16/17] async: remove unnecessary inc/dec pairs, Paolo Bonzini, 2017/01/20
- [Qemu-devel] [PATCH 12/17] block: explicitly acquire aiocontext in callbacks that need it, Paolo Bonzini, 2017/01/20
- Re: [Qemu-devel] [PATCH 00/17] aio_context_acquire/release pushdown, part 2,
Daniel P. Berrange <=
- Re: [Qemu-devel] [PATCH 00/17] aio_context_acquire/release pushdown, part 2, Paolo Bonzini, 2017/01/29