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Re: [Qemu-devel] [PATCH v6 0/7] eliminate data write in bdrv_write_zeroe

From: Kevin Wolf
Subject: Re: [Qemu-devel] [PATCH v6 0/7] eliminate data write in bdrv_write_zeroes on Linux in raw-posix.c
Date: Mon, 2 Feb 2015 14:26:23 +0100
User-agent: Mutt/1.5.21 (2010-09-15)

Am 30.01.2015 um 09:42 hat Denis V. Lunev geschrieben:
> I have performed several tests with non-aligned fallocate calls and
> in all cases (with non-aligned fallocates) Linux performs fine, i.e.
> areas are zeroed correctly. Checks were made on
> Linux 3.16.0-28-generic #38-Ubuntu SMP
> This should seriously increase performance of bdrv_write_zeroes

Thanks, applied all to the block branch.

Note that I'm hoping to remove patch 7/7 from the queue again if we come
to the conclusion that changing the global default instead makes more


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