Hello, On 09/01/11 04:50, Thadeu Lima de Souza Cascardo wrote: > On Thu, Aug 18, 2011 at 06:11:19PM +0900, Jun'ichi Nomura wrote: >> Actually, Tejun has posted a patch to replace >> execute_in_process_context() with queue_work() >> and asking your review: >> >> [PATCH RESEND] scsi: don't use execute_in_process_context() >> https://lkml.org/lkml/2011/4/30/87 >> >> Do you think you can take the patch and revert the move >> of scsi_free_queue()? > > I've tested with your suggestion (reverting the move of scsi_free_queue) > and it works like a charm. I did not get any oops after that. I tested > with a multipath setup on top of two iscsi targets. Using dd after > logging out of some of one of the iscsi targets would trigger the oops. > With this patch, it could not be triggered anymore. Thank you for testing and the report. Since scsi_free_queue() frees elevator, calling it while there still is a user of the elevator has no way to work. Either we should call it later (like the above suggestion) or change scsi_free_queue not to free the elevator (James posted a patch early in this thread). I think the latter approach could be nice if it worked. But if not, the former approach should be taken. Without fix, a path failure can cause a panic. This is bad... Best regards, -- Jun'ichi Nomura, NEC Corporation -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
