Re: [PATCH] 9p/virtio: restrict page pinning to user_backed_iter() iovec

asmadeus
2025-12-18T14:22:06Z

asmadeus@codewreck.org wrote on Thu, Dec 18, 2025 at 06:49:04AM +0900:
> Christian Schoenebeck wrote on Wed, Dec 17, 2025 at 02:41:31PM +0100:
>> Something's seriously messed up with 9p cache right now. With today's git
>> master I do get data corruption in any 9p cache mode, including cache=mmap,
>> only cache=none behaves clean.
>
> Ugh...

I've updated from v6.18-rc2 + 9p pull requests to master and I can't
reproduce any obvious corruption, booting an alpine rootfs over 9p and
building a kernel inside (tried cache=loose and mmap)

Won't be the first time I can't reproduce, but what kind of workload are
you testing?
Anything that might help me try to reproduce (like VM cpu count/memory)
will be appreciated, corruptions are Bad...

Thanks,
--
Dominique