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: Tue, 24 Jun 2014 19:11:47 -0400 Message-ID: References: <53A28B21.7070500@profihost.ag> <20140620155321.GA24389@soda.linbit> <20140620182956.GB24389@soda.linbit> <20140624115324.GB17123@soda.linbit> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from userp1040.oracle.com ([156.151.31.81]:18958 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751805AbaFXXMW (ORCPT ); Tue, 24 Jun 2014 19:12:22 -0400 In-Reply-To: <20140624115324.GB17123@soda.linbit> (Lars Ellenberg's message of "Tue, 24 Jun 2014 13:53:24 +0200") Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Lars Ellenberg Cc: "Martin K. Petersen" , Stefan Priebe - Profihost AG , 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" == Lars Ellenberg writes: Lars> We are receiving (from network) and submitting (to lower level IO Lars> stack) in the same context and would like the submit to be async. Lars> Do you intend to provide an asynchronous interface? I guess we can look into that if there is a need. Do different clients share that context? I.e. does a synchronous discard block other clients from accessing the drbd server? -- Martin K. Petersen Oracle Linux Engineering