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From: Kevin Wolf <kwolf@redhat.com>
To: Prasad Pandit <ppandit@redhat.com>
Cc: stefanha@redhat.com, qemu-block@nongnu.org,
	qemu-devel@nongnu.org, mtosatti@redhat.com,
	Prasad Pandit <pjp@fedoraproject.org>
Subject: Re: [PATCH v5] linux-aio: add IO_CMD_FDSYNC command support
Date: Tue, 28 May 2024 18:09:12 +0200	[thread overview]
Message-ID: <ZlYBqNQNpP85bT-R@redhat.com> (raw)
In-Reply-To: <20240425070412.37248-1-ppandit@redhat.com>

Am 25.04.2024 um 09:04 hat Prasad Pandit geschrieben:
> From: Prasad Pandit <pjp@fedoraproject.org>
> 
> Libaio defines IO_CMD_FDSYNC command to sync all outstanding
> asynchronous I/O operations, by flushing out file data to the
> disk storage. Enable linux-aio to submit such aio request.
> 
> When using aio=native without fdsync() support, QEMU creates
> pthreads, and destroying these pthreads results in TLB flushes.
> In a real-time guest environment, TLB flushes cause a latency
> spike. This patch helps to avoid such spikes.
> 
> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
> Signed-off-by: Prasad Pandit <pjp@fedoraproject.org>

Thanks, applied to the block branch.

Kevin



      reply	other threads:[~2024-05-28 16:09 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-04-25  7:04 [PATCH v5] linux-aio: add IO_CMD_FDSYNC command support Prasad Pandit
2024-05-28 16:09 ` Kevin Wolf [this message]

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