On Saturday, October 27, 2018 1:20:10 PM MDT Jens Axboe wrote: > On Oct 27, 2018, at 12:40 PM, Thomas Fjellstrom <thomas@xxxxxxxxxxxxx> wrote: > > Hi [snip explanation of problem] > > Can you try 4.19? A patch went in since 4.18 that fixes a starvation issue > around requeue conditions, which SATA is the one to most often hit. Gave it a shot. with the vanila kernel from git linux-stable/v4.9. It was a bit of a pain as the amdgpu driver seems to be broken for my r9 390 on many kernels, including 4.19. Had to reconfigure to the radeon driver, which I must say seems to work a lot better than it used to. At any rate, it doesn't seem to have helped a lot so far. I did end up adding "scsi_mod.use_blk_mq=0 dm_mod.use_blk_mq=0" to the default kernel boot command line in grub. It seems to have helped a little, but I haven't tested fully with a full delete of the build directory. haven't had time to sit and wait the 40+ minutes it takes to re build the entire thing. And I'm low enough on disk space that I can't easily make a copy of the 109GB build folder. I've got about 25GB free out of 780GB. I'll try and test some more soon. > Jens -- Thomas Fjellstrom thomas@xxxxxxxxxxxxx
