On 15.08.24 12:22, Darren Kenny wrote: > On Thursday, 2024-08-15 at 09:14:27 +02, Linux regression tracking (Thorsten Leemhuis) wrote: >> On 14.08.24 08:59, Michael S. Tsirkin wrote: >>> Note: Xuan Zhuo, if you have a better idea, pls post an alternative >>> patch. >>> >>> Note2: untested, posting for Darren to help with testing. >>> >>> Turns out unconditionally enabling premapped >>> virtio-net leads to a regression on VM with no ACCESS_PLATFORM, and with >>> sysctl net.core.high_order_alloc_disable=1 >>> >>> where crashes and scp failures were reported (scp a file 100M in size to VM): >>> [...] >> >> TWIMC, there is a regression report on lore Obviously I meant bugzilla here, sorry. >> and I wonder if this might >> be related or the same problem, as it also mentioned a "get_swap_device: >> Bad swap file entry" error: >> https://bugzilla.kernel.org/show_bug.cgi?id=219154 > > I took a look at the stack traces, they don't look similar to what I was > seeing, but I wasn't running with an ASAN enabled in the kernel. > [...] Yeah, but in the end it seems it is the same problem: The reporter, Takero Funaki (now CCed) meanwhile performed a bisection that ended up on f9dac92ba908 (virtio_ring: enable premapped mode regardless of use_dma_api) -- and later confirmed in bugzilla that reverting the three patches resolved the problem. Feel free to CC Takero on further mails about this. Ciao, Thorsten #regzbot report: https://lore.kernel.org/all/8b20cc28-45a9-4643-8e87-ba164a540c0a@xxxxxxxxxx/ #regzbot dup: https://bugzilla.kernel.org/show_bug.cgi?id=219154
