From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx178.postini.com [74.125.245.178]) by kanga.kvack.org (Postfix) with SMTP id 27A546B0002 for ; Mon, 22 Apr 2013 08:15:05 -0400 (EDT) Received: by mail-wi0-f170.google.com with SMTP id l13so4520605wie.1 for ; Mon, 22 Apr 2013 05:15:03 -0700 (PDT) Subject: Re: page eviction from the buddy cache Mime-Version: 1.0 (Apple Message framework v1283) Content-Type: text/plain; charset=us-ascii From: Alexey Lyahkov In-Reply-To: <20130420235718.GA28789@thunk.org> Date: Mon, 22 Apr 2013 15:14:55 +0300 Content-Transfer-Encoding: quoted-printable Message-Id: <128E4C4E-555C-43B6-9BA4-7914CBAF5B62@gmail.com> References: <51504A40.6020604@ya.ru> <20130327150743.GC14900@thunk.org> <3C8EEEF8-C1EB-4E3D-8DE6-198AB1BEA8C0@gmail.com> <515CD665.9000300@gmail.com> <239AD30A-2A31-4346-A4C7-8A6EB8247990@gmail.com> <51730619.3030204@fastmail.fm> <20130420235718.GA28789@thunk.org> Sender: owner-linux-mm@kvack.org List-ID: To: Theodore Ts'o Cc: Bernd Schubert , Will Huck , Hugh Dickins , Andrew Perepechko , linux-ext4@vger.kernel.org, akpm@linux-foundation.org, linux-mm@kvack.org, mgorman@suse.de Theodore, May you provide more details about discussion and new interface? someone from mm think we need to implement mark_acccessed_force() with = avoiding is in LRU checks? and move single page directly without waiting a LRU drain ? On Apr 21, 2013, at 02:57, Theodore Ts'o wrote: > On Sat, Apr 20, 2013 at 11:18:17PM +0200, Bernd Schubert wrote: >> Alex, Andrew, >>=20 >> did you notice the patch Ted just sent? >> ("ext4: mark all metadata I/O with REQ_META") >=20 > This patch was sent to fix another issue that was brought up at Linux > Storage, Filesystem, and MM workshop. I did bring up this issue with > Mel Gorman while at LSF/MM, and as a result, tThe mm folks are going > to look into making mark_page_accessed() do the right thing, or > perhaps provide us with new interface. The problem with forcing the > page to be marked as activated is this would cause a TLB flush, which > would be pointless since this these buddy bitmap pages aren't actually > mapped in anywhere. >=20 > - Ted -- 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