On Tue, Aug 21, 2012 at 02:22:35PM +0300, Hiroshi Doyu wrote: > The following "__get_vm_area_node()" can take gfp_mask, it means that > this function is expected to be called from atomic context, but why > it's _NOT_ allowed _ONLY_ from interrupt context? One reason is it takes read/write locks without using the IRQ safe versions for starters (vmap_area_lock and vmlist_lock). I don't see any other reasons in that bit of code though. -- 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>