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| author | Aruna Ramakrishna <[email protected]> | 2025-07-09 17:33:28 +0000 |
|---|---|---|
| committer | Peter Zijlstra <[email protected]> | 2025-07-14 08:59:31 +0000 |
| commit | 36569780b0d64de283f9d6c2195fd1a43e221ee8 (patch) | |
| tree | 94292b3c406e76d645dbc9e2bd0118240ed9c00d /tools/lib/bpf/bpf_prog_linfo.c | |
| parent | Linux 6.16-rc6 (diff) | |
| download | kernel-36569780b0d64de283f9d6c2195fd1a43e221ee8.tar.gz kernel-36569780b0d64de283f9d6c2195fd1a43e221ee8.zip | |
sched: Change nr_uninterruptible type to unsigned long
The commit e6fe3f422be1 ("sched: Make multiple runqueue task counters
32-bit") changed nr_uninterruptible to an unsigned int. But the
nr_uninterruptible values for each of the CPU runqueues can grow to
large numbers, sometimes exceeding INT_MAX. This is valid, if, over
time, a large number of tasks are migrated off of one CPU after going
into an uninterruptible state. Only the sum of all nr_interruptible
values across all CPUs yields the correct result, as explained in a
comment in kernel/sched/loadavg.c.
Change the type of nr_uninterruptible back to unsigned long to prevent
overflows, and thus the miscalculation of load average.
Fixes: e6fe3f422be1 ("sched: Make multiple runqueue task counters 32-bit")
Signed-off-by: Aruna Ramakrishna <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'tools/lib/bpf/bpf_prog_linfo.c')
0 files changed, 0 insertions, 0 deletions