Date: Tue, 10 Feb 2026 22:20:12 -0800 From: Bakul Shah <bakul@iitbombay.org> To: Paul Vixie <paul@redbarn.org> Cc: Emil Tsalapatis <emil@etsalapatis.com>, Pete Wright <pete@nomadlogic.org>, Mario Marietto <marietto2008@gmail.com>, FreeBSD virtualization <freebsd-virtualization@freebsd.org> Subject: Re: RFC: Kernel virtiofs driver Message-ID: <11AD883A-2824-4F1D-848E-CBD508E30040@iitbombay.org> In-Reply-To: <b1066bf8-9e29-4c50-aae2-234dfbe20d8b@redbarn.org> References: <CABFh=a5HoDOHthe%2BavAAxpb3YN4W3FAGqCysdbyrBbr4Rw7rMg@mail.gmail.com> <CA%2B1FSijd9Cgr7KAL_pD0ACCr7%2BGTMoXR9zQ=skNVFdkstP6KJA@mail.gmail.com> <9c3f1865-d47f-4fcf-a34b-866ee727a25b@nomadlogic.org> <CABFh=a7S8sSEfD1FSKS=n-X=eqw-nsutr3BbA06WyBy=oLz8KA@mail.gmail.com> <b1066bf8-9e29-4c50-aae2-234dfbe20d8b@redbarn.org>
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On Feb 10, 2026, at 8:27 PM, Paul Vixie <paul@redbarn.org> wrote: > > Do both p9fs and virtiofs both support mmap() such that two or more guests, and the host, can all map a file on the host for read/write access, and each see writes made by the others? This is my pain point with nfs and smb. At least read-access works fine in p9fs. Haven't tried anything else. I suspect writes would be not seen across VMs (at least for p9fs). For that to work you'd have to map the same host page in both VMs. > Is either one as lightweight as zvol and ufs, such that I could consider using it for the os? > > I appreciate all the effort both teams have put in. > Paul Vixiehome | help
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