On 06/19/2012 03:32 AM, Xiao Guangrong wrote: > zcache_do_preload uses ZCACHE_GFP_MASK to allocate memory that will be sleep, > but zcache_do_preload is called in zcache_put_page where IRQ is disabled > > Fix it by use GFP_ATOMIC flag Did you get a might_sleep warning on this? I haven't seen this being an issue. GFP_ATOMIC only modifies the existing mask to allow allocation use the emergency pool. It is __GFP_WAIT not being set that prevents sleep. We don't want to use the emergency pool since we make large, long lived allocations with this mask. -- Seth -- 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>