On Wed, 2014-05-07 at 10:19 +0200, Sebastian Andrzej Siewior wrote: > On 05/03/2014 07:03 PM, Mike Galbraith wrote: > >> Mike, I see that lockdep splat (sleeping while atomic) during cpu-hotplug. > >> Don't you see this, too? > > > > Nope, didn't. > > Hmm. blk_mq_hctx_notify(). It does > spin_lock(&ctx->lock); > > Isn't this a sleeping spinlock for you or don't get here at all? Hm, cts->lock... git@marge:~/suse/scratch_area/linux-3.12-SLE12-RT> grep -IR cpu_lock block git@marge:~/suse/scratch_area/linux-3.12-SLE12-RT> (here lock lock lock, here boy) marge:/usr/local/src/kernel/linux-3.x.git # grep -IR cpu_lock block marge:/usr/local/src/kernel/linux-3.x.git # marge:/usr/local/src/kernel/linux-3.14 # grep -IR cpu_lock block marge:/usr/local/src/kernel/linux-3.14 # (what the..) marge:/usr/local/src/kernel/linux-3.14-rt # grep -IR cpu_lock block block/blk-mq.c: spin_lock(&ctx->cpu_lock); block/blk-mq.c: spin_unlock(&ctx->cpu_lock); block/blk-mq.c: spin_unlock(&ctx->cpu_lock); block/blk-mq.c: spin_lock(&ctx->cpu_lock); block/blk-mq.c: spin_lock_init(&__ctx->cpu_lock); block/blk-mq.h: spinlock_t cpu_lock; marge:/usr/local/src/kernel/linux-3.14-rt # (aha!) Nope, I definitely don't get there. -Mike -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
