On Tue, 23 Feb 2010 22:13:56 +0100 "Rafael J. Wysocki" <rjw@xxxxxxx> wrote: > Well, it still looks like we're waiting for create_workqueue_thread() to > return, which probably is trying to allocate memory for the thread > structure. > > My guess is that the preallocated memory pages freed by > free_unnecessary_pages() go into a place from where they cannot be taken for > subsequent NOIO allocations. I have no idea why that happens though. > > To test that theory you can try to change GFP_IOFS to GFP_KERNEL in the > calls to clear_gfp_allowed_mask() in kernel/power/hibernate.c (and in > kernel/power/suspend.c for completness). > If allocation of kernel threads for stop_machine_run() is the problem, What happens when 1. use CONIFG_4KSTACK or 2. make use of stop_machine_create(), stop_machine_destroy(). A new interface added by this commit. http://git.kernel.org/?p=linux/kernel/git/torvalds/ linux-2.6.git;a=commit;h=9ea09af3bd3090e8349ca2899ca2011bd94cda85 You can do no-fail stop_machine_run(). Thanks, -Kame -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>