From: Kevin Wolf <kwolf@redhat.com>
To: "Denis V. Lunev" <den@openvz.org>
Cc: Fam Zheng <famz@redhat.com>, Peter Lieven <pl@kamp.de>,
qemu-devel@nongnu.org, Stefan Hajnoczi <stefanha@redhat.com>,
Max Reitz <mreitz@redhat.com>
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 [thread overview]
Message-ID: <20150202132623.GD9478@noname.redhat.com> (raw)
In-Reply-To: <1422607337-25335-1-git-send-email-den@openvz.org>
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
sense.
Kevin
prev parent reply other threads:[~2015-02-02 13:26 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-30 8:42 [Qemu-devel] [PATCH v6 0/7] eliminate data write in bdrv_write_zeroes on Linux in raw-posix.c Denis V. Lunev
2015-01-30 8:42 ` [Qemu-devel] [PATCH 1/7] block/raw-posix: create translate_err helper to merge errno values Denis V. Lunev
2015-01-30 8:44 ` Peter Lieven
2015-01-30 8:42 ` [Qemu-devel] [PATCH 2/7] block/raw-posix: create do_fallocate helper Denis V. Lunev
2015-01-30 8:47 ` Peter Lieven
2015-01-30 8:49 ` Denis V. Lunev
2015-01-30 8:50 ` Peter Lieven
2015-01-30 8:42 ` [Qemu-devel] [PATCH 3/7] block/raw-posix: refactor handle_aiocb_write_zeroes a bit Denis V. Lunev
2015-01-30 8:42 ` [Qemu-devel] [PATCH 4/7] block: use fallocate(FALLOC_FL_ZERO_RANGE) in handle_aiocb_write_zeroes Denis V. Lunev
2015-01-30 8:42 ` [Qemu-devel] [PATCH 5/7] block/raw-posix: call plain fallocate " Denis V. Lunev
2015-01-30 14:58 ` Max Reitz
2015-01-30 15:41 ` Denis V. Lunev
2015-01-30 15:42 ` Max Reitz
2015-01-30 15:53 ` Denis V. Lunev
2015-01-30 8:42 ` [Qemu-devel] [PATCH 6/7] block: use fallocate(FALLOC_FL_PUNCH_HOLE) & fallocate(0) to write zeroes Denis V. Lunev
2015-01-30 15:02 ` Max Reitz
2015-01-30 8:42 ` [Qemu-devel] [PATCH 7/7] block/raw-posix: set max_write_zeroes to INT_MAX for regular files Denis V. Lunev
2015-02-02 13:23 ` Kevin Wolf
2015-02-02 13:55 ` Peter Lieven
2015-02-02 14:04 ` Kevin Wolf
2015-02-02 14:12 ` Peter Lieven
2015-02-02 14:16 ` Kevin Wolf
2015-02-02 14:20 ` Peter Lieven
2015-02-02 14:38 ` Denis V. Lunev
2015-02-02 14:49 ` Kevin Wolf
2015-02-02 15:30 ` Denis V. Lunev
2015-02-02 13:26 ` Kevin Wolf [this message]
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