From: Christoph Hellwig <hch@lst.de>
To: Kevin Wolf <kwolf@redhat.com>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH v3 1/2] Add bdrv_aio_multiwrite
Date: Fri, 11 Sep 2009 00:44:01 +0200 [thread overview]
Message-ID: <20090910224401.GB25700@lst.de> (raw)
In-Reply-To: <1252511618-19497-2-git-send-email-kwolf@redhat.com>
One thing that concerns me here is that we keep adding more memory
allocations to the I/O path. At least on fast SSDs even kernel memory
allocations are a performance problem and they're much faster than
userspace ones.
next prev parent reply other threads:[~2009-09-10 22:44 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-09 15:53 [Qemu-devel] [PATCH v3 0/2] block: Handle multiple write requests at once Kevin Wolf
2009-09-09 15:53 ` [Qemu-devel] [PATCH v3 1/2] Add bdrv_aio_multiwrite Kevin Wolf
[not found] ` <m3ocpj67ip.fsf@neno.mitica>
2009-09-10 7:07 ` [Qemu-devel] " Kevin Wolf
2009-09-10 22:44 ` Christoph Hellwig [this message]
2009-09-11 6:29 ` [Qemu-devel] " Kevin Wolf
2009-09-11 18:36 ` Christoph Hellwig
2009-09-09 15:53 ` [Qemu-devel] [PATCH v3 2/2] virtio-blk: Use bdrv_aio_multiwrite Kevin Wolf
2009-09-10 22:41 ` Christoph Hellwig
2009-09-11 7:10 ` Kevin Wolf
2009-09-11 18:39 ` Christoph Hellwig
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