On Wed, Feb 29, 2012 at 05:26:07PM -0800, David Rientjes wrote: > On Wed, 29 Feb 2012, Rafael Aquini wrote: > > > Following the example at mm/slub.c, add out-of-memory diagnostics to the SLAB > > allocator to help on debugging OOM conditions. This patch also adds a new > > sysctl, 'oom_dump_slabs_forced', that overrides the effect of __GFP_NOWARN page > > allocation flag and forces the kernel to report every slab allocation failure. > > > > An example print out looks like this: > > > > <snip page allocator out-of-memory message> > > SLAB: Unable to allocate memory on node 0 (gfp=0x11200) > > cache: bio-0, object size: 192, order: 0 > > node0: slabs: 3/3, objs: 60/60, free: 0 > > > > Signed-off-by: Rafael Aquini <aquini@xxxxxxxxxx> > > I like it, except for the addition of the sysctl. __GFP_NOWARN is used > for a reason, usually because whatever is allocating memory can gracefully > handle a failure and should not be emitted to the kernel log under any > circumstances. Ok, I'll drop the sysctl part then. Pekka? David, once again, thanks for your feedback! Rafael -- 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>