From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: vhost changes (batched) in linux-next after 12/13 trigger random crashes in KVM guests after reboot Date: Wed, 18 Dec 2019 10:10:11 -0500 Message-ID: <20191218100926-mutt-send-email-mst__24562.7329846442$1576681833$gmane$org@kernel.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Content-Disposition: inline List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" To: Christian Borntraeger Cc: Stephen Rothwell , kvm list , "linux-kernel@vger.kernel.org" , "virtualization@lists.linux-foundation.org" , Halil Pasic , Linux Next Mailing List List-Id: virtualization@lists.linuxfoundation.org On Wed, Dec 18, 2019 at 03:43:43PM +0100, Christian Borntraeger wrote: > Michael, > > with > commit db7286b100b503ef80612884453bed53d74c9a16 (refs/bisect/skip-db7286b100b503ef80612884453bed53d74c9a16) > vhost: use batched version by default > plus > commit 6bd262d5eafcdf8cdfae491e2e748e4e434dcda6 (HEAD, refs/bisect/bad) > Revert "vhost/net: add an option to test new code" > to make things compile (your next tree is not easily bisectable, can you fix that as well?). I'll try. > > I get random crashes in my s390 KVM guests after reboot. > Reverting both patches together with commit decd9b8 "vhost: use vhost_desc instead of vhost_log" to > make it compile again) on top of linux-next-1218 makes the problem go away. > > Looks like the batched version is not yet ready for prime time. Can you drop these patches until > we have fixed the issues? > > Christian > Will do, thanks for letting me know. -- MST