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Date: Sun, 11 Apr 2010 09:35:37 -0700 (PDT) From: Ben Gamari <bgamari.foss@...il.com> To: Avi Kivity <avi@...hat.com>, linux-btrfs@...r.kernel.org Cc: Andi Kleen <andi@...stfloor.org>, Arjan van de Ven <arjan@...radead.org>, linux-kernel@...r.kernel.org, tytso@....edu, npiggin@...e.de, mingo@...e.hu, Ruald Andreae <ruald.a@...il.com>, Jens Axboe <jens.axboe@...cle.com>, Olly Betts <olly@...vex.com>, martin f krafft <madduck@...duck.net> Subject: Re: Poor interactive performance with I/O loads with fsync()ing On Sun, 11 Apr 2010 18:03:00 +0300, Avi Kivity <avi@...hat.com> wrote: > On 04/09/2010 05:56 PM, Ben Gamari wrote: > > On Mon, 29 Mar 2010 00:08:58 +0200, Andi Kleen<andi@...stfloor.org> wrote: > > > >> Ben Gamari<bgamari.foss@...il.com> writes: > >> ext4/XFS/JFS/btrfs should be better in this regard > >> > >> > > I am using btrfs, so yes, I was expecting things to be better. Unfortunately, > > the improvement seems to be non-existent under high IO/fsync load. > > > > btrfs is known to perform poorly under fsync. > Has the reason for this been identified? Judging from the nature of metadata loads, it would seem that it should be substantially easier to implement fsync() efficiently. - Ben -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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