From: Simon Jeons <simon.jeons@gmail.com>
To: Eric Wong <normalperson@yhbt.net>
Cc: xtu4 <xiaobing.tu@intel.com>,
linux-kernel@vger.kernel.org, linux-tip-commits@vger.kernel.org,
linux-mm@kvack.org, di.zhang@intel.com
Subject: Re: resend--[PATCH] improve read ahead in kernel
Date: Thu, 20 Dec 2012 01:20:35 -0500 [thread overview]
Message-ID: <1355984435.1374.3.camel@kernel-VirtualBox> (raw)
In-Reply-To: <20121216021508.GA3629@dcvr.yhbt.net>
On Sun, 2012-12-16 at 02:15 +0000, Eric Wong wrote:
> xtu4 <xiaobing.tu@intel.com> wrote:
> > resend it, due to format error
> >
> > Subject: [PATCH] when system in low memory scenario, imaging there is a mp3
> > play, ora video play, we need to read mp3 or video file
> > from memory to page cache,but when system lack of memory,
> > page cache of mp3 or video file will be reclaimed.once read
> > in memory, then reclaimed, it will cause audio or video
> > glitch,and it will increase the io operation at the same
> > time.
>
> To me, this basically describes how POSIX_FADV_NOREUSE should work.
Hi Eric,
But why fadvise POSIX_FADV_NOREUSE almost do nothing? Why not set some
flag or other things for these use once data?
> I would like to have this ability via fadvise (and not CONFIG_).
>
> Also, I think your patch has too many #ifdefs to be accepted.
>
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next prev parent reply other threads:[~2012-12-20 6:21 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-09 15:57 [PATCH] improve read ahead in kernel xtu4
2012-12-09 10:18 ` Randy Dunlap
2012-12-11 3:40 ` resend--[PATCH] " xtu4
2012-12-16 2:15 ` Eric Wong
2012-12-20 6:20 ` Simon Jeons [this message]
2012-12-20 10:55 ` Roman Gushchin
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