mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/
synced 2026-10-20 19:23:40 +00:00
874611d193
The sysctl handlers for min_unmapped_ratio and min_slab_ratio invoke setup_min_unmapped_ratio() and setup_min_slab_ratio() unconditionally after proc_dointvec_minmax(), even for read operations. These setup functions first zero all per-NUMA node thresholds (min_unmapped_pages and min_slab_pages) before recalculating them. Reading /proc sysctl entries therefore temporarily resets node reclaim thresholds to zero, which may disturb the behavior of __node_reclaim() and node_reclaim() during the recomputation. Fix this by only calling the setup functions when the sysctl is actually written (write == 1), matching the behavior of existing sysctl handlers like min_free_kbytes and watermark_scale_factor. This only affects systems with CONFIG_NUMA. Link: https://lore.kernel.org/tencent_5891052AF9A4C2D490A62F478D446F74AB09@qq.com Signed-off-by: Jianlin Shi <shijianlin11@foxmail.com> Cc: Brendan Jackman <jackmanb@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@kernel.org> Cc: Zi Yan <ziy@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
7968 lines
223 KiB
7968 lines
223 KiB