Messages in this thread | | | Date | Tue, 27 Apr 2010 10:35:17 +0900 | From | KAMEZAWA Hiroyuki <> | Subject | Re: swapping when there's a free memory |
| |
On Mon, 26 Apr 2010 15:33:33 -0700 Andrew Morton <akpm@linux-foundation.org> wrote:
> On Sun, 25 Apr 2010 09:13:49 +0200 > Pavel Machek <pavel@ucw.cz> 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? > And please /proc/buddyinfo and /proc/zoneinfo when the system is swappy.
Thanks, -Kame
> > > > This abnormal behavior doesn't happen everytime, it happend about twice > > > for many spadfsck attempts. > > > > ...yep, that would be random. > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
| |