Hi Andrew, thanks a lot for the very thorough bug report! This far
better than apport logs, you basically explained everything that is
going on plus what is need to fix it, much appreciated!
Based on upstream tree, I see the following 2 commits that carry Fixes
tag to the offender you pointed:
e27be240df53 ("mm: memcg: make sure memory.events is uptodate when waking
pollers")
c3cc39118c36 ("mm: memcontrol: fix NR_WRITEBACK leak in memcg and system stats")
Did you manage to test with both commits? They don't appear to be present in
linux-stable, which is unfortunate, especially since the offender *is* present
in v4.14.y.
I'll try to cook a kernel with both fixes and submit them to the ML.
Cheers,
Guilherme
** Changed in: linux (Ubuntu)
Status: Confirmed => In Progress
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https://bugs.launchpad.net/bugs/1926081
Title:
nr_writeback memory leak in kernel 4.15.0-137+
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