From: Zheng Liu <gnehzuil.liu@gmail.com>
To: Lukas Czerner <lczerner@redhat.com>
Cc: Andreas Dilger <adilger@whamcloud.com>,
Eric Sandeen <sandeen@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
"linux-ext4@vger.kernel.org" <linux-ext4@vger.kernel.org>,
Zheng Liu <wenqing.lz@taobao.com>
Subject: Re: [RFC][PATCH 0/3] add FALLOC_FL_NO_HIDE_STALE flag in fallocate
Date: Wed, 18 Apr 2012 20:06:00 +0800 [thread overview]
Message-ID: <20120418120600.GC3447@gmail.com> (raw)
In-Reply-To: <alpine.LFD.2.00.1204181336440.5310@dhcp-27-109.brq.redhat.com>
On Wed, Apr 18, 2012 at 01:39:06PM +0200, Lukas Czerner wrote:
> On Wed, 18 Apr 2012, Zheng Liu wrote:
>
> > > I auspect the real problem may be the lazy inode table zeroing being done in the kernel. If the test is run immediately after formatting the filesystem, then the kernel thread is busy writing to the disk in the background and interfering with your benchmark.
> > >
> > > Please format the filesystem with "-E lazy-itable-init=0", to avoid this behavior.
> >
> > I format the filesystem with this option, but it seems that it is
> > useless.
>
> What do you mean by that ? It does not work as it's supposed to ?
> ext4lazyinit kernel thread is still running ? Or the slowdown was not
> caused by the lazy init in the first place ?
Sorry, I have used this option and retry to run the benchmark, but the
slowdown is still in there.
Regards,
Zheng
next prev parent reply other threads:[~2012-04-18 11:59 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-17 16:53 [RFC][PATCH 0/3] add FALLOC_FL_NO_HIDE_STALE flag in fallocate Zheng Liu
2012-04-17 16:53 ` [RFC][PATCH 1/3] vfs: " Zheng Liu
2012-04-17 16:53 ` [RFC][PATCH 2/3] vfs: add security check for _NO_HIDE_STALE flag Zheng Liu
2012-04-17 16:53 ` [RFC][PATCH 3/3] ext4: add FALLOC_FL_NO_HIDE_STALE support Zheng Liu
2012-04-17 17:40 ` [RFC][PATCH 0/3] add FALLOC_FL_NO_HIDE_STALE flag in fallocate Eric Sandeen
2012-04-18 4:08 ` Zheng Liu
2012-04-18 7:48 ` Lukas Czerner
2012-04-18 12:03 ` Zheng Liu
2012-04-18 12:07 ` Lukas Czerner
2012-04-20 9:52 ` Zheng Liu
2012-04-18 4:59 ` Andreas Dilger
2012-04-18 8:19 ` Lukas Czerner
2012-04-18 12:48 ` Zheng Liu
2012-04-18 15:09 ` Andreas Dilger
2012-04-20 9:59 ` Zheng Liu
2012-04-18 11:38 ` Zheng Liu
2012-04-18 11:39 ` Lukas Czerner
2012-04-18 12:06 ` Zheng Liu [this message]
2012-04-18 14:57 ` Eric Sandeen
2012-04-17 17:59 ` Ric Wheeler
2012-04-17 18:43 ` Ted Ts'o
2012-04-17 18:52 ` Ric Wheeler
2012-04-17 18:53 ` Eric Sandeen
2012-04-17 19:04 ` Ted Ts'o
2012-04-18 3:02 ` Dave Chinner
2012-04-18 16:07 ` Ted Ts'o
2012-04-18 23:37 ` Dave Chinner
2012-04-18 8:04 ` Lukas Czerner
-- strict thread matches above, loose matches on Subject: below --
2012-04-23 1:55 Szabolcs Szakacsits
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