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| author | Sebastian Andrzej Siewior <[email protected]> | 2021-02-26 17:11:55 +0100 |
|---|---|---|
| committer | Vlastimil Babka <[email protected]> | 2021-09-04 01:12:23 +0200 |
| commit | 5a836bf6b09f99ead1b69457ff39ab3011ece57b (patch) | |
| tree | 959be42f69d765d7198b8c1d6c8aa1a3f3e54ec7 /lib/test_overflow.c | |
| parent | 08beb547a1f7b66fbeaf40f2d3675a3ea0060c0b (diff) | |
mm: slub: move flush_cpu_slab() invocations __free_slab() invocations out of IRQ context
flush_all() flushes a specific SLAB cache on each CPU (where the cache
is present). The deactivate_slab()/__free_slab() invocation happens
within IPI handler and is problematic for PREEMPT_RT.
The flush operation is not a frequent operation or a hot path. The
per-CPU flush operation can be moved to within a workqueue.
Because a workqueue handler, unlike IPI handler, does not disable irqs,
flush_slab() now has to disable them for working with the kmem_cache_cpu
fields. deactivate_slab() is safe to call with irqs enabled.
[[email protected]: adapt to new SLUB changes]
Signed-off-by: Sebastian Andrzej Siewior <[email protected]>
Signed-off-by: Vlastimil Babka <[email protected]>
Diffstat (limited to 'lib/test_overflow.c')
0 files changed, 0 insertions, 0 deletions