From: Andres Freund <andres@anarazel.de> To: "Michael S. Tsirkin" <mst@redhat.com> Cc: Xuan Zhuo <xuanzhuo@linux.alibaba.com>, Jason Wang <jasowang@redhat.com>, "David S. Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, Linus Torvalds <torvalds@linux-foundation.org>, Jens Axboe <axboe@kernel.dk>, James Bottomley <James.Bottomley@hansenpartnership.com>, "Martin K. Petersen" <martin.petersen@oracle.com>, Guenter Roeck <linux@roeck-us.net>, linux-kernel@vger.kernel.org, Greg KH <gregkh@linuxfoundation.org>, c@redhat.com Subject: Re: upstream kernel crashes Date: Mon, 15 Aug 2022 10:46:17 -0700 [thread overview] Message-ID: <20220815174617.z4chnftzcbv6frqr@awork3.anarazel.de> (raw) In-Reply-To: <20220815124748-mutt-send-email-mst@kernel.org> Hi, On 2022-08-15 12:50:52 -0400, Michael S. Tsirkin wrote: > On Mon, Aug 15, 2022 at 09:45:03AM -0700, Andres Freund wrote: > > Hi, > > > > On 2022-08-15 11:40:59 -0400, Michael S. Tsirkin wrote: > > > OK so this gives us a quick revert as a solution for now. > > > Next, I would appreciate it if you just try this simple hack. > > > If it crashes we either have a long standing problem in virtio > > > code or more likely a gcp bug where it can't handle smaller > > > rings than what device requestes. > > > Thanks! > > > > I applied the below and the problem persists. > > > > [...] > > Okay! Just checking - I applied and tested this atop 6.0-rc1, correct? Or did you want me to test it with the 762faee5a267 reverted? I guess what you're trying to test if a smaller queue than what's requested you'd want to do so without the problematic patch applied... > And just to be 100% sure, can you try the following on top of 5.19: > diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c > index 623906b4996c..6f4e54a618bc 100644 > --- a/drivers/virtio/virtio_pci_modern.c > +++ b/drivers/virtio/virtio_pci_modern.c > @@ -208,6 +208,9 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev, > return ERR_PTR(-EINVAL); > } > > + if (num > 1024) > + num = 1024; > + > info->msix_vector = msix_vec; > > /* create the vring */ > > -- Either way, I did this, and there are no issues that I could observe. No oopses, no broken networking. But: To make sure it does something I added a debugging printk - which doesn't show up. I assume this is at a point at least earlyprintk should work (which I see getting enabled via serial)? Greetings, Andres Freund
WARNING: multiple messages have this Message-ID (diff)
From: Andres Freund <andres@anarazel.de> To: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jens Axboe <axboe@kernel.dk>, "Martin K. Petersen" <martin.petersen@oracle.com>, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, James Bottomley <James.Bottomley@hansenpartnership.com>, Eric Dumazet <edumazet@google.com>, Greg KH <gregkh@linuxfoundation.org>, c@redhat.com, Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>, Linus Torvalds <torvalds@linux-foundation.org>, "David S. Miller" <davem@davemloft.net>, Guenter Roeck <linux@roeck-us.net> Subject: Re: upstream kernel crashes Date: Mon, 15 Aug 2022 10:46:17 -0700 [thread overview] Message-ID: <20220815174617.z4chnftzcbv6frqr@awork3.anarazel.de> (raw) In-Reply-To: <20220815124748-mutt-send-email-mst@kernel.org> Hi, On 2022-08-15 12:50:52 -0400, Michael S. Tsirkin wrote: > On Mon, Aug 15, 2022 at 09:45:03AM -0700, Andres Freund wrote: > > Hi, > > > > On 2022-08-15 11:40:59 -0400, Michael S. Tsirkin wrote: > > > OK so this gives us a quick revert as a solution for now. > > > Next, I would appreciate it if you just try this simple hack. > > > If it crashes we either have a long standing problem in virtio > > > code or more likely a gcp bug where it can't handle smaller > > > rings than what device requestes. > > > Thanks! > > > > I applied the below and the problem persists. > > > > [...] > > Okay! Just checking - I applied and tested this atop 6.0-rc1, correct? Or did you want me to test it with the 762faee5a267 reverted? I guess what you're trying to test if a smaller queue than what's requested you'd want to do so without the problematic patch applied... > And just to be 100% sure, can you try the following on top of 5.19: > diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c > index 623906b4996c..6f4e54a618bc 100644 > --- a/drivers/virtio/virtio_pci_modern.c > +++ b/drivers/virtio/virtio_pci_modern.c > @@ -208,6 +208,9 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev, > return ERR_PTR(-EINVAL); > } > > + if (num > 1024) > + num = 1024; > + > info->msix_vector = msix_vec; > > /* create the vring */ > > -- Either way, I did this, and there are no issues that I could observe. No oopses, no broken networking. But: To make sure it does something I added a debugging printk - which doesn't show up. I assume this is at a point at least earlyprintk should work (which I see getting enabled via serial)? Greetings, Andres Freund _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization
next prev parent reply other threads:[~2022-08-15 17:46 UTC|newest] Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-08-14 21:26 upstream kernel crashes Guenter Roeck 2022-08-14 21:40 ` Linus Torvalds 2022-08-14 22:37 ` Andres Freund 2022-08-14 22:47 ` Linus Torvalds 2022-08-15 1:04 ` Jens Axboe 2022-08-15 1:36 ` Andres Freund 2022-08-15 3:18 ` Linus Torvalds 2022-08-15 7:11 ` Andres Freund 2022-08-15 7:29 ` Michael S. Tsirkin 2022-08-15 7:46 ` Andres Freund 2022-08-15 7:53 ` Michael S. Tsirkin 2022-08-15 8:02 ` Michael S. Tsirkin 2022-08-15 8:02 ` Michael S. Tsirkin 2022-08-15 7:51 ` Michael S. Tsirkin 2022-08-15 8:15 ` Andres Freund 2022-08-15 8:28 ` Michael S. Tsirkin 2022-08-15 8:34 ` Andres Freund 2022-08-15 15:40 ` Michael S. Tsirkin 2022-08-15 15:40 ` Michael S. Tsirkin 2022-08-15 16:45 ` Andres Freund 2022-08-15 16:45 ` Andres Freund 2022-08-15 16:50 ` Michael S. Tsirkin 2022-08-15 16:50 ` Michael S. Tsirkin 2022-08-15 17:46 ` Andres Freund [this message] 2022-08-15 17:46 ` Andres Freund 2022-08-15 20:21 ` Michael S. Tsirkin 2022-08-15 20:21 ` Michael S. Tsirkin 2022-08-15 20:53 ` Andres Freund 2022-08-15 20:53 ` Andres Freund 2022-08-15 21:04 ` Andres Freund 2022-08-15 21:04 ` Andres Freund 2022-08-15 21:10 ` Andres Freund 2022-08-15 21:10 ` Andres Freund 2022-08-15 21:32 ` Michael S. Tsirkin 2022-08-15 21:32 ` Michael S. Tsirkin 2022-08-16 2:45 ` Xuan Zhuo 2022-08-16 2:45 ` Xuan Zhuo 2022-08-17 6:13 ` Dmitry Vyukov 2022-08-17 6:13 ` Dmitry Vyukov via Virtualization 2022-08-17 6:36 ` Xuan Zhuo 2022-08-17 6:36 ` Xuan Zhuo 2022-08-17 10:53 ` Michael S. Tsirkin 2022-08-17 10:53 ` Michael S. Tsirkin 2022-08-17 15:58 ` Linus Torvalds 2022-08-17 15:58 ` Linus Torvalds 2022-08-18 1:55 ` Xuan Zhuo 2022-08-18 1:55 ` Xuan Zhuo 2022-08-15 20:45 ` Guenter Roeck 2022-08-15 20:45 ` Guenter Roeck 2022-08-15 6:36 ` Michael S. Tsirkin 2022-08-15 7:17 ` Andres Freund 2022-08-15 7:43 ` Michael S. Tsirkin 2022-08-15 1:17 ` Guenter Roeck 2022-08-15 1:29 ` Jens Axboe 2022-08-15 9:43 ` Michael S. Tsirkin 2022-08-15 15:49 ` Guenter Roeck 2022-08-15 16:01 ` Michael S. Tsirkin 2022-08-15 18:22 ` Guenter Roeck 2022-08-15 18:37 ` Linus Torvalds 2022-08-15 20:38 ` Guenter Roeck 2022-08-17 17:12 ` Linus Torvalds 2022-08-18 1:08 ` Andres Freund
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20220815174617.z4chnftzcbv6frqr@awork3.anarazel.de \ --to=andres@anarazel.de \ --cc=James.Bottomley@hansenpartnership.com \ --cc=axboe@kernel.dk \ --cc=c@redhat.com \ --cc=davem@davemloft.net \ --cc=edumazet@google.com \ --cc=gregkh@linuxfoundation.org \ --cc=jasowang@redhat.com \ --cc=kuba@kernel.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux@roeck-us.net \ --cc=martin.petersen@oracle.com \ --cc=mst@redhat.com \ --cc=netdev@vger.kernel.org \ --cc=pabeni@redhat.com \ --cc=torvalds@linux-foundation.org \ --cc=virtualization@lists.linux-foundation.org \ --cc=xuanzhuo@linux.alibaba.com \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.