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Re: [Qemu-devel] [PATCH v5] QEMUBH: make AioContext's bh re-entrant
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] [PATCH v5] QEMUBH: make AioContext's bh re-entrant |
Date: |
Tue, 25 Jun 2013 10:45:27 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Wed, Jun 26, 2013 at 01:26:25AM +0800, Liu Ping Fan wrote:
> BH will be used outside big lock, so introduce lock to protect
> between the writers, ie, bh's adders and deleter. The lock only
> affects the writers and bh's callback does not take this extra lock.
> Note that for the same AioContext, aio_bh_poll() can not run in
> parallel yet.
>
> Signed-off-by: Liu Ping Fan <address@hidden>
>
> ---------
> v4->v5
> fix some grammar issue
> v3->v4
> resolve memory order of bh->idle and ->scheduled
> add comments for qemu_bh_delete/cancel
> ---
> async.c | 32 ++++++++++++++++++++++++++++++--
> include/block/aio.h | 7 +++++++
> 2 files changed, 37 insertions(+), 2 deletions(-)
Reviewed-by: Stefan Hajnoczi <address@hidden>