Hi Sorry for my late catch up. Yes, there is a usage on dm_bufio_client_create() struct dm_buffer *b = alloc_buffer(c, GFP_KERNEL); Since there is no __GFP_NORETRY, alloc_buffer will fallback to vmalloc. Also, I suspect here we'd better use GFP_NOIO & __GFP_NORETRY? Thanks Mike On Mon, Apr 8, 2013 at 6:00 AM, Joe Thornber <thornber@xxxxxxxxxx> wrote: > On Fri, Apr 05, 2013 at 03:57:50PM -0400, Mikulas Patocka wrote: >> Hi >> >> This patch avoids a possible deadlock in dm-bufio. (it could happen only >> with large block size, at most PAGE_SIZE << MAX_ORDER (typically 8MiB). > > Does anything currently use such large block sizes? (dm-thin and > dm-cache stick to 4k blocks). > > - Joe -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
