On 10/11/2016 10:45 AM, Dave Jones wrote: > This is from Linus' current tree, with Al's iovec fixups on top. > > ------------[ cut here ]------------ > WARNING: CPU: 1 PID: 3673 at lib/list_debug.c:33 __list_add+0x89/0xb0 > list_add corruption. prev->next should be next (ffffe8ffff806648), but was > ffffc9000067fcd8. (prev=ffff880503878b80). > CPU: 1 PID: 3673 Comm: trinity-c0 Not tainted 4.8.0-think+ #13 > ffffc90000d87458 ffffffff8d32007c ffffc90000d874a8 0000000000000000 > ffffc90000d87498 ffffffff8d07a6c1 0000002100000246 ffff88050388e880 > ffff880503878b80 ffffe8ffff806648 ffffe8ffffc06600 ffff880502808008 > Call Trace: > [<ffffffff8d32007c>] dump_stack+0x4f/0x73 > [<ffffffff8d07a6c1>] __warn+0xc1/0xe0 > [<ffffffff8d07a73a>] warn_slowpath_fmt+0x5a/0x80 > [<ffffffff8d33e689>] __list_add+0x89/0xb0 > [<ffffffff8d30a1c8>] blk_sq_make_request+0x2f8/0x350
/* * A task plug currently exists. Since this is completely lockless, * utilize that to temporarily store requests until the task is * either done or scheduled away. */ plug = current->plug; if (plug) { blk_mq_bio_to_request(rq, bio); if (!request_count) trace_block_plug(q); blk_mq_put_ctx(data.ctx); if (request_count >= BLK_MAX_REQUEST_COUNT) { blk_flush_plug_list(plug, false); trace_block_plug(q); } list_add_tail(&rq->queuelist, &plug->mq_list); ^^^^^^^^^^^^^^^^^^^^^^ Dave, is this where we're crashing? This seems strange. -chris