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SubjectRe: [patch] mm, slab: periodically resched in drain_freelist()
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On 12/28/22 07:05, David Rientjes wrote:
> drain_freelist() can be called with a very large number of slabs to free,
> such as for kmem_cache_shrink(), or depending on various settings of the
> slab cache when doing periodic reaping.
>
> If there is a potentially long list of slabs to drain, periodically
> schedule to ensure we aren't saturating the cpu for too long.
>
> Signed-off-by: David Rientjes <rientjes@google.com>

Thanks, added to slab/for-6.2-rc3/fixes

> ---
> mm/slab.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/mm/slab.c b/mm/slab.c
> --- a/mm/slab.c
> +++ b/mm/slab.c
> @@ -2211,6 +2211,8 @@ static int drain_freelist(struct kmem_cache *cache,
> raw_spin_unlock_irq(&n->list_lock);
> slab_destroy(cache, slab);
> nr_freed++;
> +
> + cond_resched();
> }
> out:
> return nr_freed;

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