From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: [vm] writing to UDF DVD+RW (/dev/sr0) while under memory pressure: box ==> doorstop From: Mike Galbraith In-Reply-To: <20080109150139.311f68d3.akpm@linux-foundation.org> References: <1199447212.4529.13.camel@homer.simson.net> <1199612533.4384.54.camel@homer.simson.net> <1199642470.3927.12.camel@homer.simson.net> <20080106122954.d8f04c98.akpm@linux-foundation.org> <1199790316.4094.57.camel@homer.simson.net> <20080108033801.40d0043a.akpm@linux-foundation.org> <1199805713.3571.12.camel@homer.simson.net> <1199806071.4174.2.camel@homer.simson.net> <1199877080.4340.19.camel@homer.simson.net> <20080109150139.311f68d3.akpm@linux-foundation.org> Content-Type: text/plain Date: Thu, 10 Jan 2008 05:21:25 +0100 Message-Id: <1199938885.4324.80.camel@homer.simson.net> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, bfennema@falcon.csc.calpoly.edu List-ID: On Wed, 2008-01-09 at 15:01 -0800, Andrew Morton wrote: > So are you saying that the fs throughput is unaltered by this change, > but that the side-effects which your workload has on the overall > machine are lessened? Yes. UDF IO is still a slow trickle, but the box is now fine under VM stress, vs all allocating tasks eventually getting nailed (essentially forever) by iprune_mutex previously. -Mike P.S. I would submit one-liner for VFS part, but it's useless without UDF part, and nobody is hitting what I ran into while testing alleged scsi_done regression thingy anyway. cc added. -- 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