From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx199.postini.com [74.125.245.199]) by kanga.kvack.org (Postfix) with SMTP id C558E6B005D for ; Sat, 15 Dec 2012 21:15:09 -0500 (EST) Date: Sun, 16 Dec 2012 02:15:08 +0000 From: Eric Wong Subject: Re: resend--[PATCH] improve read ahead in kernel Message-ID: <20121216021508.GA3629@dcvr.yhbt.net> References: <50C4B4E7.60601@intel.com> <50C6AB45.606@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <50C6AB45.606@intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: xtu4 Cc: linux-kernel@vger.kernel.org, linux-tip-commits@vger.kernel.org, linux-mm@kvack.org, di.zhang@intel.com xtu4 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. I would like to have this ability via fadvise (and not CONFIG_). Also, I think your patch has too many #ifdefs to be accepted. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org