Hi Michael, On Sat, Feb 5, 2022 at 1:04 AM Michael Schmitz <schmitzmic@xxxxxxxxx> wrote:
commit 180dccb0dba4f5e84a4a70c1be1d34cbb6528b32 (blk-mq: fix tag_get wait task can't be awakened) does cause a regression on my m68k hardware test rig (m68k Falcon030, IDE disk attached through pata-falcon driver which does use polled IO instead of interrupts, so may be a little on the slow side).
Bisection between v5.16 and v5.17-rc1 points to 180dccb0dba4f5e84a4a70c1be1d34cbb6528b32 as the culprit, which is corroborated by reverting that commit in v5.17-rc1 and booting as rapidly as before.
Now you know the culprit, it looks like several other people ran into this. Does this fix help? https://lore.kernel.org/all/1643040870.3bwvk3sis4.none@localhost/ It is commit 10825410b956dc1e ("blk-mq: Fix wrong wakeup batch configuration which will cause hang") in v5.17-rc2. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
