From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:59376) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1T3N5u-0005JZ-3J for qemu-devel@nongnu.org; Mon, 20 Aug 2012 04:12:18 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1T3N5t-000887-2x for qemu-devel@nongnu.org; Mon, 20 Aug 2012 04:12:18 -0400 Received: from mail.profihost.ag ([85.158.179.208]:34895) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1T3N5s-00087Z-Ob for qemu-devel@nongnu.org; Mon, 20 Aug 2012 04:12:16 -0400 Message-ID: <5031F15D.7050307@profihost.ag> Date: Mon, 20 Aug 2012 10:12:13 +0200 From: Stefan Priebe - Profihost AG MIME-Version: 1.0 References: <1345326543-10677-1-git-send-email-pbonzini@redhat.com> <50309BEE.3090602@profihost.ag> <5030E5F2.7060903@redhat.com> <50313D03.8040101@profihost.ag> <5031E5CC.7090306@redhat.com> <5031E86F.2000000@profihost.ag> <5031F060.1030602@redhat.com> In-Reply-To: <5031F060.1030602@redhat.com> Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH RFT 0/3] iscsi: fix NULL dereferences / races between task completion and abort List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Paolo Bonzini Cc: qemu-devel@nongnu.org, ronniesahlberg@gmail.com Hi Ronnie, Am 20.08.2012 10:08, schrieb Paolo Bonzini: > That's because the "big QEMU lock" is held by the thread that called > qemu_aio_cancel. > >> and i also see >> no cancellation message in kernel log. > > And that's because the UNMAP actually ultimately succeeds. You'll > probably see soft lockup messages though. > > The solution here is to bump the timeout of the UNMAP command (either in > the kernel or in libiscsi, I didn't really understand who's at fault). What's your suggestion / idea about that? Greets, Stefan