On 04/03/2013 12:19 PM, Mel Gorman wrote: > On Tue, Apr 02, 2013 at 11:14:36AM -0400, Theodore Ts'o wrote: >> On Tue, Apr 02, 2013 at 11:06:51AM -0400, Theodore Ts'o wrote: >>> >>> Can you try 3.9-rc4 or later and see if the problem still persists? >>> There were a number of ext4 issues especially around low memory >>> performance which weren't resolved until -rc4. >> >> Actually, sorry, I took a closer look and I'm not as sure going to >> -rc4 is going to help (although we did have some ext4 patches to fix a >> number of bugs that flowed in as late as -rc4). >> > > I'm running with -rc5 now. I have not noticed much interactivity problems > as such but the stall detection script reported that mutt stalled for > 20 seconds opening an inbox and imapd blocked for 59 seconds doing path > lookups, imaps blocked again for 12 seconds doing an atime update, an RSS > reader blocked for 3.5 seconds writing a file. etc. > > There has been no reclaim activity in the system yet and 2G is still free > so it's very unlikely to be a page or slab reclaim problem. Ok, so now I'm runnning 3.9.0-rc5-next-20130404, it's not that bad, but it still sucks. Updating a kernel in a VM still results in "Your system is too SLOW to play this!" by mplayer and frame dropping. 3.5G out of 6G memory used, the rest is I/O cache. I have 7200RPM disks in my desktop. -- js suse labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>