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/[email protected] http://lkml.kernel.org/r/[email protected] http://lkml.kernel.org/r/cam_iqpwupvgc2ky8m-9yukects+zkjidasnymx7rmcbjbfy...@mail.gmail.com 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.
