Hello Mateusz,
On 3/4/2025 12:02 AM, K Prateek Nayak wrote:
Hello Mateusz,
On 3/3/2025 11:24 PM, Mateusz Guzik wrote:
Can you guys try out the patch below?
It changes things up so that there is no need to read 2 different vars.
It is not the final version and I don't claim to be able to fully
justify the thing at the moment either, but I would like to know if it
fixes the problem.
Happy to help! We've queued the below patch for an overnight run, will
report back once it is done.
Hackbench has been running for a few thousand iteration now without
experiencing any hangs yet with your changes.
Full disclaimer: We're testing on top of commit aaec5a95d596
("pipe_read: don't wake up the writer if the pipe is still full") where the
issue is more reproducible. I've replaced the VFS_BUG_ON() with a plain
BUG_ON() based on [1] since v6.14-rc1 did not include the CONFIG_DEBUG_VFS
bits. Hope that is alright.
[1] https://lore.kernel.org/lkml/20250209185523.745956-2-mjguzik@xxxxxxxxx/
/off to get some shut eyes/
--
Thanks and Regards,
Prateek
