On Sun, 26 Jul 2009, Larry Finger wrote: > Rafael J. Wysocki wrote: > > This message has been generated automatically as a part of a report > > of regressions introduced between 2.6.29 and 2.6.30. > > > > The following bug entry is on the current list of known regressions > > introduced between 2.6.29 and 2.6.30. Please verify if it still should > > be listed and let me know (either way). > > > > > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=13319 > > Subject : Page allocation failures with b43 and p54usb > > Submitter : Larry Finger <Larry.Finger@xxxxxxxxxxxx> > > Date : 2009-04-29 21:01 (89 days old) > > References : http://marc.info/?l=linux-kernel&m=124103897101088&w=4 > > http://lkml.org/lkml/2009/6/7/136 > > Handled-By : Johannes Berg <johannes@xxxxxxxxxxxxxxxx> > > This bug was fixed by commit 781b2ba6eb5f22440afac9c79a89ebd6e3674a60 > entitled "SLUB: Out-of-memory diagnostics" by Pekka Enberg > <penberg@xxxxxxxxxxxxxx> and dated Wed Jun 10 18:50:32 2009 +0300. > Hmm, I'm remembering differently. I thought the root problem here has only been fixed in Pekka's slab-2.6.git tree with "slub: add option to disable higher order debugging slabs" and isn't currently in Linus' tree. > The fault occurred because when CONFIG_SLUB_DEBUG was set, many of the > memory allocations for wireless buffers were increased from O(0) to > O(1) causing memory fragmentation, and eventually there were no > remaining O(1) fragments. This problem is unlikely to affect most > users as none of the distos turn on the above debug option. > It only happens when CONFIG_SLUB_DEBUG_ON is enabled for caches with sizes that increase as the result of the added metadata. -- To unsubscribe from this list: send the line "unsubscribe kernel-testers" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
