On Fri, 5 Nov 2010 08:48:13 -0400 Sanjoy Mahajan <sanjoy@xxxxxxxx> wrote: > Dave Chinner <david@xxxxxxxxxxxxx> wrote: > > > I think anyone reporting a interactivity problem also needs to > > indicate what their filesystem is, what mount paramters they are > > using, what their storage config is, whether barriers are active or > > not, what elevator they are using, whether one or more of the > > applications are issuing fsync() or sync() calls, and so on. > > Good idea. > > The filesystems are all ext3 with default mount parameters. The > dmesgs say that the filesystems are mounted in ordered data mode and > that barriers are not enabled. btw few more things to try (from my standard rc.local script): echo 4096 > /sys/block/sda/queue/nr_requests for i in `pidof kjournald` ; do ionice -c1 -p $i ; done echo 75 > /proc/sys/vm/dirty_ratio (replace sda with whatever your disk is of course) -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>