On Sat, Nov 07, 2015 at 10:22:55AM +0900, Tetsuo Handa wrote: > All jbd2_alloc() callers seem to pass GFP_NOFS. Therefore, use of > vmalloc() which implicitly passes GFP_KERNEL | __GFP_HIGHMEM can cause > deadlock, can't it? This vmalloc(size) call needs to be replaced with > __vmalloc(size, flags). jbd2_alloc is only passed in the bh->b_size, which can't be > PAGE_SIZE, so the code path that calls vmalloc() should never get called. When we conveted jbd2_alloc() to suppor sub-page size allocations in commit d2eecb039368, there was an assumption that it could be called with a size greater than PAGE_SIZE, but that's certaily not true today. - Ted -- 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>