On Sun, 25 Apr 2010 09:13:49 +0200 Pavel Machek <pavel@xxxxxx> wrote: > Hi! > > > I captured this output of vmstat. The machine was freeing cache and > > swapping out pages even when there was a plenty of free memory. > > > > The machine is sparc64 with 1GB RAM with 2.6.34-rc4. This abnormal > > swapping happened during running spadfsck --- a fsck program for a custom > > filesystem that caches most reads in its internal cache --- so it reads > > buffers and allocates memory at the same time. > > > > Note that sparc64 doesn't have any low/high memory zones, so it couldn't > > be explained by filling one zone and needing to allocate pages in it. > > Fragmented memory + high-order allocation? Yeah, could be. I wonder which slab/slub/slob implementation you're using, and what page sizes it uses for dentries, inodes, etc. Can you have a poke in /prob/slabinfo? > > This abnormal behavior doesn't happen everytime, it happend about twice > > for many spadfsck attempts. > > ...yep, that would be random. -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>