mm/vmalloc: eliminated the lock contention from twice to once (!4474) · Merge requests · Red Hat / centos-stream / src / kernel / centos-stream-9

Aristeu Rozanski requested to merge arozansk/centos-stream-9:arozansk-RHEL-28501 into main Jun 12, 2024

JIRA: https://issues.redhat.com/browse/RHEL-28501

This patch prevents having to take vma_area_lock twice when the mapping area
is known while allocating a new vma. This patch has (for now) a better outcome
than upstream as RHEL9 doesn't have d093602919ad5
(mm: vmalloc: remove global vmap_area_root rb-tree) backported yet.

Signed-off-by: Aristeu Rozanski arozansk@redhat.com

mm/vmalloc: eliminated the lock contention from twice to once

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