From: Rafael Aquini <[email protected]> redhat: configs: decrease CONFIG_PCP_BATCH_SCALE_MAX
In page allocator, PCP (Per-CPU pageset) is refilled and drained in batches. The batch number is scaled automatically to improve page allocation/free throughput. But a too large scale factor may end up hurting latency, like observed on https://issues.redhat.com/browse/RHEL-59526. We're bringing this down to 0 for RHEL, to provide a smooth linear scaling factor as opposed to the default exponential scaling factor. Signed-off-by: Rafael Aquini <[email protected]> diff --git a/redhat/configs/rhel/generic/CONFIG_PCP_BATCH_SCALE_MAX b/redhat/configs/rhel/generic/CONFIG_PCP_BATCH_SCALE_MAX index blahblah..blahblah 100644 --- a/redhat/configs/rhel/generic/CONFIG_PCP_BATCH_SCALE_MAX +++ b/redhat/configs/rhel/generic/CONFIG_PCP_BATCH_SCALE_MAX @@ -1 +1 @@ -CONFIG_PCP_BATCH_SCALE_MAX=5 +CONFIG_PCP_BATCH_SCALE_MAX=0 -- https://gitlab.com/cki-project/kernel-ark/-/merge_requests/3440 -- _______________________________________________ kernel mailing list -- [email protected] To unsubscribe send an email to [email protected] Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/[email protected] Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
