From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <20060206052627.8205.qmail@web33004.mail.mud.yahoo.com> Date: Sun, 5 Feb 2006 21:26:27 -0800 (PST) From: Shantanu Goel Subject: Re: [VM PATCH] rotate_reclaimable_page fails frequently In-Reply-To: <20060205205056.01a025fa.akpm@osdl.org> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton , Rik van Riel Cc: sgoel01@yahoo.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: --- Andrew Morton wrote: > Rik van Riel wrote: > > The question is, why is the page not yet back on > the > > LRU by the time the data write completes ? > > Could be they're ext3 pages which were written out > by kjournald. Such > pages are marked dirty but have clean buffers. > ext3_writepage() will > discover that the page is actually clean and will > mark it thus without > performing any I/O. > I had conjectured that something like this might be happening without knowing the details of how ext3 implements writepage. The filesystem tested on here is ext3. > Shantanu, I suggest you add some instrumentation > there too, see if it's > working. (That'll be non-trivial. Just because we > hit PAGE_CLEAN: here > doesn't necessarily mean that the page will be > reclaimed). I'll do so and report back the results. Shantanu __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- 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