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Tsirkin" To: Filip Hejsek Cc: Linus Torvalds , kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, alok.a.tiwari@oracle.com, ashwini@wisig.com, hi@alyssa.is, maxbr@linux.ibm.com, zhangjiao2@cmss.chinamobile.com, Greg Kroah-Hartman Subject: Re: [GIT PULL v2] virtio,vhost: last minute fixes Message-ID: <20250918121009-mutt-send-email-mst@kernel.org> References: <20250918110946-mutt-send-email-mst@kernel.org> <869d0cd1576c2ea95a87d40e6ce49b97d62237c9.camel@gmail.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <869d0cd1576c2ea95a87d40e6ce49b97d62237c9.camel@gmail.com> On Thu, Sep 18, 2025 at 05:45:05PM +0200, Filip Hejsek wrote: > On Thu, 2025-09-18 at 11:09 -0400, Michael S. Tsirkin wrote: > > Most notably this reverts a virtio console > > change since we made it without considering compatibility > > sufficiently. > > It seems that we are not in agreement about whether it should be > reverted or not. I think it should depend on whether the virtio spec > maintainers are willing to change it to agree with the Linux > implementation. I was under the impression that they aren't. Ugh. OK I guess I'll drop this one too then. That leaves nothing relevant for this pull request. > I will quote some conversation from the patch thread. > > Maximilian Immanuel Brandtner wrote: > > On a related note, during the initial discussion of this changing the > > virtio spec was proposed as well (as can be read from the commit mgs), > > however at the time on the viritio mailing list people were resistent > > to the idea of changing the virtio spec to conform to the kernel > > implementation. > > I don't really care if this discrepancy is fixed one way or the other, > > but it should most definitely be fixed. > > I wrote: > > I'm of the same opinion, but if it is fixed on the kernel side, then > > (assuming no device implementation with the wrong order exists) I think > > maybe the fix should be backported to all widely used kernels. It seems > > that the patch hasn't been backported to the longterm kernels [1], > > which I think Debian kernels are based on. > > > > [1]: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/log/drivers/char/virtio_console.c?h=v6.12.47 > > Maximilian Immanuel Brandtner wrote: > > Then I guess the patch-set should be backported > > After that, I sent a backport request to stable@. Maybe I should have > waited some more time before doing that. > > Anyway, I don't care which way this dilemma will be resolved, but the > discussion is currently scattered among too many places and it's hard > to determine what the consensus is. > > Best regards, > Filip Hejsek