The patch subject is misleading. This should be "don't flood the system
log". Nobody cares about the speed of a unittest ;)
On 07.05.24 04:29, John Hubbard wrote:
If a system experiences a lot of memory failures, then any associated
printk() output really needs to be rate-limited. I noticed this while
running selftests/mm/uffd-unit-tests, which logs 12,305 lines of output,
adding (on my system) an extra 97 seconds of runtime due to printk time.
Recently discussed:
https://lkml.kernel.org/r/a9e3120d-8b79-4435-b113-ceb20aa45ee2@xxxxxxxxxxxx
See the pros/cons of using ratelimiting, and what an alternative for
uffd is that Axel is working on.
(CCing Peter and Axel)
--
Cheers,
David / dhildenb
