tsacct: Skip all kernel threads
When we hit acct_account_cputime within a irq handler over a kthread
that happens to use a userspace mm, we end up summing up the mm's RSS
into the tsk acct_rss_mem1, which eventually decays.
I don't see a good rationale behind tracking the mm's rss in that way
when a kthread use a userspace mm temporarily through use_mm.
It causes issues with init_mm and efi_mm which only partially initialize
their mm_struct.
Skip all kernel threads in acct_account_cputime(), not just those that
happen to have a NULL mm.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
1 file changed
