On Tue, Jun 21, 2011 at 11:47:35AM +0100, P?draig Brady wrote: > On 21/06/11 11:39, Mel Gorman wrote: > > On Tue, Jun 21, 2011 at 10:53:02AM +0100, P?draig Brady wrote: > >> I tried the 2 patches here to no avail: > >> http://marc.info/?l=linux-mm&m=130503811704830&w=2 > >> > >> I originally logged this at: > >> https://bugzilla.redhat.com/show_bug.cgi?id=712019 > >> > >> I can compile up and quickly test any suggestions. > >> > > > > I recently looked through what kswapd does and there are a number > > of problem areas. Unfortunately, I haven't gotten around to doing > > anything about it yet or running the test cases to see if they are > > really problems. In your case, the following is a strong possibility > > though. This should be applied on top of the two patches merged from > > that thread. > > > > This is not tested in any way, based on 3.0-rc3 > > This does not fix the issue here. > I made a silly mistake here. When you mentioned two patches applied, I assumed you meant two patches that were finally merged from that discussion thread instead of looking at your linked mail. Now that I have checked, I think you applied the SLUB patches while the patches I was thinking of are; [afc7e326: mm: vmscan: correct use of pgdat_balanced in sleeping_prematurely] [f06590bd: mm: vmscan: correctly check if reclaimer should schedule during shrink_slab] The first one in particular has been reported by another user to fix hangs related to copying large files. I'm assuming you are testing against the Fedora kernel. As these patches were merged for 3.0-rc1, can you check if applying just these two patches to your kernel helps? -- Mel Gorman 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>