Hi Oleg, Oleg Nesterov wrote on Mon, Aug 18, 2025 at 02:56:26PM +0200: > On 08/18, syzbot wrote: > > syzbot has tested the proposed patch and the reproducer did not trigger any issue: (I hate that syzbot identified "hung in v9fs_file_fsync" but doesn't bother to Cc 9p folks... all the time..) > Dominique, David, > > Perhaps you can reconsider the fix that Prateek and I tried to propose > in this thread > > [syzbot] [netfs?] INFO: task hung in netfs_unbuffered_write_iter > https://lore.kernel.org/all/67dedd2f.050a0220.31a16b.003f.GAE@xxxxxxxxxx/ I've re-read that thread, and I still think this must be a problem specific to syzbot doing obviously bogus things (e.g. replying before request, or whatever it is this particular repro is doing), but I guess your patch is also sane enough and the 9p optimization is probably not really needed here Please resend as a proper patch, and I'll just run some quick check (and a trivial benchmark) and pick it up Thanks, -- Dominique Martinet | Asmadeus
