https://bugzilla.novell.com/show_bug.cgi?id=133718 https://bugzilla.novell.com/show_bug.cgi?id=133718#c36 --- Comment #36 from Jan Kara <jack@suse.com> 2013-12-12 13:04:51 UTC --- Yeah, that's kind of expected given the load and the configuration - when userspace creates some memory pressure we have to get free pages somewhere. Since the USB storage is slow in cleaning dirty pages, page reclaim likely finds itself under pressure by dirty pages remaining for a long time at the end of the LRU list and either decides to swap (if possible) or synchronously waits for IO to complete before giving back new pages. And that causes hiccups. Actually for 4GB or 8GB systems current dirty_ratio setting is already a bit too high for a standard desktop. Can you try setting /proc/sys/vm/dirty_bytes to "250000000" (~250 MB) and /proc/sys/vm/dirty_background_bytes to "125000000" (~125 MB). Does it help with hangs? Can you observe some adverse effects of these changes when using the desktop? I'm asking because we are thinking about a similar change upstream and you are my Guinea pig :) -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.