On Fri, Nov 21, 2014 at 03:38:41PM -0800, Andrew Morton wrote: > On Fri, 21 Nov 2014 17:14:06 +0900 Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> wrote: > > > Extended memory to store page owner information is initialized some time > > later than that page allocator starts. Until initialization, many pages > > can be allocated and they have no owner information. This make debugging > > using page owner harder, so some fixup will be helpful. > > > > This patch fix up this situation by setting fake owner information > > immediately after page extension is initialized. Information doesn't > > tell the right owner, but, at least, it can tell whether page is > > allocated or not, more correctly. > > > > On my testing, this patch catches 13343 early allocated pages, although > > they are mostly allocated from page extension feature. Anyway, after then, > > there is no page left that it is allocated and has no page owner flag. > > We really should have a Documentation/vm/page_owner.txt which explains > all this stuff, provides examples, etc. Okay. Will do in next spin. 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>