linux-stable-mirror

mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2026-04-03 12:05:13 +02:00

Files

Heiko Carstens 00d5cf8c59 s390/vtime: Fix virtual timer forwarding

[ Upstream commit dbc0fb3567 ]

Since delayed accounting of system time [1] the virtual timer is
forwarded by do_account_vtime() but also vtime_account_kernel(),
vtime_account_softirq(), and vtime_account_hardirq(). This leads
to double accounting of system, guest, softirq, and hardirq time.

Remove accounting from the vtime_account*() family to restore old behavior.

There is only one user of the vtimer interface, which might explain
why nobody noticed this so far.

Fixes: b7394a5f4c ("sched/cputime, s390: Implement delayed accounting of system time") [1]
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2026-03-13 17:20:18 +01:00