2016-03-17 17:13 GMT+09:00 Richard Weinberger <richard@xxxxxx>: > Am 17.03.2016 um 08:11 schrieb Joonsoo Kim: >>> It is still not clear why UBIFS has to provide a >migratepage() and what the expected semantics >>> are. >>> What we know so far is that the fall back migration function is broken. I'm sure not only on UBIFS. >>> >>> Can CMA folks please clarify? :-) >> >> Hello, >> >> As you mentioned earlier, this issue would not be directly related >> to CMA. It looks like it is more general issue related to interaction >> between MM and FS. Your first error log shows that error happens when >> ubifs_set_page_dirty() is called in try_to_unmap_one() which also >> can be called by reclaimer (kswapd or direct reclaim). Quick search shows >> that problem also happens on reclaim. Is that fixed? >> >> http://www.spinics.net/lists/linux-fsdevel/msg79531.html > > Well, this problem happened only on a tainted kernel and never popped up again. > So, I really don't know. :-) > >> I think that you need to CC other people who understand interaction >> between MM and FS perfectly. > > Who is missing on the CC list? Vlastimil already added Hugh and Mel to other relevant thread but I think this thread has more information about the problem so I add them here. Thanks. -- 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>