On Wed, Jun 12, 2024 at 04:44:27PM +0200, Thomas Voegtle wrote: > On Wed, 12 Jun 2024, Greg KH wrote: > > > On Tue, Jun 11, 2024 at 09:20:33AM +0200, Thomas Voegtle wrote: > > > > > > Hello, > > > > > > a machine booted with Linux 6.6.23 up to 6.6.32: > > > > > > writing /dev/zero with dd on a mounted cifs share with vers=1.0 or > > > vers=2.0 slows down drastically in my setup after writing approx. 46GB of > > > data. > > > > > > The whole machine gets unresponsive as it was under very high IO load. It > > > pings but opening a new ssh session needs too much time. I can stop the dd > > > (ctrl-c) and after a few minutes the machine is fine again. > > > > > > cifs with vers=3.1.1 seems to be fine with 6.6.32. > > > Linux 6.10-rc3 is fine with vers=1.0 and vers=2.0. > > > > > > Bisected down to: > > > > > > cifs-fix-writeback-data-corruption.patch > > > which is: > > > Upstream commit f3dc1bdb6b0b0693562c7c54a6c28bafa608ba3c > > > and > > > linux-stable commit e45deec35bf7f1f4f992a707b2d04a8c162f2240 > > > > > > Reverting this patch on 6.6.32 fixes the problem for me. > > > > Odd, that commit is kind of needed :( > > > > Is there some later commit that resolves the issue here that we should > > pick up for the stable trees? > > > > Hope this helps: > > Linux 6.9.4 is broken in the same way and so is 6.9.0. How about Linus's tree? thnanks, greg k-h
