From: Fengguang Wu <fengguang.wu@intel.com>
To: Simon Jeons <simon.jeons@gmail.com>
Cc: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
hughd@google.com, riel@redhat.com,
Johannes Weiner <hannes@cmpxchg.org>,
mtk.manpages@gmail.com
Subject: Re: fadvise doesn't work well.
Date: Wed, 9 Jan 2013 16:23:10 +0800 [thread overview]
Message-ID: <20130109082310.GA21379@localhost> (raw)
In-Reply-To: <1357719508.6568.5.camel@kernel.cn.ibm.com>
On Wed, Jan 09, 2013 at 02:18:28AM -0600, Simon Jeons wrote:
> On Wed, 2013-01-09 at 16:09 +0800, Fengguang Wu wrote:
> > Hi Simon,
> >
> > Try run "sync" before doing fadvise, because fadvise won't drop
> > dirty/writeback/mapped pages.
> >
>
> Hi Fengguang,
>
> Thanks for your quick response. But the result is the same in
> attachment.
>
> > Thanks,
> > Fengguang
> >
> > On Wed, Jan 09, 2013 at 02:05:21AM -0600, Simon Jeons wrote:
> > > In attanchment.
> >
> > > root@kernel:~/Documents/mm/tools/linux-ftools# dd if=../../../images/ubuntu-11.04-desktop-i386.iso of=/tmpfs
>
> The pages of ../../../images/ubuntu-11.04-desktop-i386.iso is mapped or
> unmapped?
You may check if anyone is using (hence possibly mapping) it with
lsof | grep ubuntu-11.04-desktop-i386.iso
Thanks,
Fengguang
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next prev parent reply other threads:[~2013-01-09 8:23 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-09 8:05 fadvise doesn't work well Simon Jeons
2013-01-09 8:09 ` Fengguang Wu
2013-01-09 8:18 ` Simon Jeons
2013-01-09 8:23 ` Fengguang Wu [this message]
2013-01-09 8:26 ` Fengguang Wu
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