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. -- 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>