From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Martin K. Petersen" Subject: Re: sd_setup_discard_cmnd: BUG: unable to handle kernel NULL pointer dereference at (null) Date: Thu, 19 Jun 2014 23:08:22 -0400 Message-ID: References: <53A28B21.7070500@profihost.ag> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <53A28B21.7070500@profihost.ag> (Stefan Priebe's message of "Thu, 19 Jun 2014 09:02:57 +0200") Sender: linux-raid-owner@vger.kernel.org To: Stefan Priebe - Profihost AG Cc: NeilBrown , linux-raid@vger.kernel.org, linux-scsi , JBottomley@parallels.com, Jens Axboe , konrad.wilk@oracle.com, elder@linaro.org, Josh Durgin , Greg KH , Lars Ellenberg List-Id: linux-raid.ids >>>>> "Stefan" == Stefan Priebe <- Profihost AG > writes: Stefan> Hi, while using vanilla 3.10.44 with drbd on top of a md raid1. Stefan> I'm pretty often hitting the followin kernel bug. Stefan> [] blk_add_request_payload+0xc/0x90 That's really messed up. This means we received a request with no bio. Does this happen with later kernels? -- Martin K. Petersen Oracle Linux Engineering