Messages in this thread | | | Date | Tue, 20 Oct 2009 13:51:39 +0100 | From | Mel Gorman <> | Subject | Re: [Bug #14141] order 2 page allocation failures (generic) |
| |
On Tue, Oct 20, 2009 at 01:44:50PM +0200, Tobias Oetiker wrote: > Hi Mel, > > Today Mel Gorman wrote: > > > On Mon, Oct 19, 2009 at 10:17:06PM +0200, Tobias Oetiker wrote: > > > > Oct 19 22:09:52 johan kernel: [11157.121600] [<ffffffff813ebd42>] skb_copy+0x32/0xa0 [kern.warning] > > > Oct 19 22:09:52 johan kernel: [11157.121615] [<ffffffffa07dd33c>] vboxNetFltLinuxPacketHandler+0x5c/0xd0 [vboxnetflt] [kern.warning] > > > Oct 19 22:09:52 johan kernel: [11157.121620] [<ffffffff813f2512>] dev_hard_start_xmit+0x142/0x320 [kern.warning] > > > > Are the number of failures at least reduced or are they occuring at the > > same rate? > > not that it would have any statistical significance, but I had 5 > failure (clusters) yesterday morning and 5 this morning ... >
Before the patches were applied, how many failures were you seeing in the morning?
> the failures often show up in groups I saved one on > http://tobi.oetiker.ch/cluster-2009-10-20-08-31.txt > > > Also, what was the last kernel that worked for you with this > > configuration? > > that would be 2.6.24 ... I have not upgraded in quite some time. > But since the io performance of 2.6.31 is about double in my tests > I thought it would be a good thing todo ... >
That significant a different in performance may explain differences in timing as well. i.e. the allocator is being put under more pressure now than it was previously as more processes make forward progress.
-- Mel Gorman Part-time Phd Student Linux Technology Center University of Limerick IBM Dublin Software Lab
| |