Tetsuo Handa wrote: > Changes from v7 [11]: > > (1) Reflect review comments from Andrew Morton. (Convert "u8 type" to > "bool report", use CPUHP_PAGE_ALLOC_DEAD event and replace > for_each_possible_cpu() with for_each_online_cpu(), reuse existing > rcu_lock_break() and hung_timeout_jiffies() for now, update comments). > > Changes from v8 [12]: > > (1) Check mempool_alloc() as well, for mempool_alloc() is a sort of > open-coded __GFP_NOFAIL allocation request where warn_alloc() cannot > detect stalls due to __GFP_NORETRY, and actually I found a case where > kswapd was unable to get memory for bio from mempool at > bio_alloc_bioset(GFP_NOFS) [13], and I believe there are similar bugs. Andrew, I believe it is time to start testing at linux-next. Nobody shows interests in detecting/analyzing OOM livelock but there are still unsolved suspicious cases http://lkml.kernel.org/r/da13c3c7-b514-67b0-2eb9-6d6af277901b@xxxxxxxxxxxxx http://lkml.kernel.org/r/20170502141544.rufykv6blliqzqfd@xxxxxxxxxxx http://lkml.kernel.org/r/CAM_iQpWuPVGc2ky8M-9yukECtS+zKjiDasNymX7rMcBjBFyM_A@xxxxxxxxxxxxxx where this patch might have given some clues if this patch were available. There is no reason not to allow users to try this debugging aid. -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
