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Re: [Qemu-devel] [PATCH v3 1/2] Add bdrv_aio_multiwrite


From: Christoph Hellwig
Subject: Re: [Qemu-devel] [PATCH v3 1/2] Add bdrv_aio_multiwrite
Date: Fri, 11 Sep 2009 00:44:01 +0200
User-agent: Mutt/1.3.28i

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.  




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