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authorLinus Torvalds <torvalds@linux-foundation.org>2025-07-11 17:10:32 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2025-07-11 17:10:32 -0700
commit5f02b80c21e1511c32a37f642497751041069076 (patch)
tree5498d625b152eaac34ca900044c3ecc38339c6cc /tools/perf/scripts/python/exported-sql-viewer.py
parent40f92e79b0aabbf3575e371f9054657a421a3e79 (diff)
Revert "eventpoll: Fix priority inversion problem"
This reverts commit 8c44dac8add7503c345c0f6c7962e4863b88ba42. I haven't figured out what the actual bug in this commit is, but I did spend a lot of time chasing it down and eventually succeeded in bisecting it down to this. For some reason, this eventpoll commit ends up causing delays and stuck user space processes, but it only happens on one of my machines, and only during early boot or during the flurry of initial activity when logging in. I must be triggering some very subtle timing issue, but once I figured out the behavior pattern that made it reasonably reliable to trigger, it did bisect right to this, and reverting the commit fixes the problem. Of course, that was only after I had failed at bisecting it several times, and had flailed around blaming both the drm people and the netlink people for the odd problems. The most obvious of which happened at the time of the first graphical login (the most common symptom being that some gnome app aborted due to a 30s timeout, often leading to the whole session then failing if it was some critical component like gnome-shell or similar). Acked-by: Nam Cao <namcao@linutronix.de> Cc: Frederic Weisbecker <frederic@kernel.org> Cc: Valentin Schneider <vschneid@redhat.com> Cc: Christian Brauner <brauner@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools/perf/scripts/python/exported-sql-viewer.py')
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