mm/damon: improve damon_new_region strategy

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Kdamond is implemented as a periodical split-merge pattern, which will
create and destroy regions possibly at high frequency (hundreds or even
thousands of per sec), depending on the number of regions and aggregation
period.  In that case, kmalloc and kfree could bring speed and space
overheads, which can be improved by using a private kmem cache.

[set_pte_at@outlook.com: creating kmem cache for damon regions by KMEM_CACHE()]
  Link: https://lkml.kernel.org/r/Message-ID:
Link: https://lkml.kernel.org/r/TYCP286MB2323DA1894FA55BB9CF90978CA449@TYCP286MB2323.JPNP286.PROD.OUTLOOK.COM
Signed-off-by: Dawei Li <set_pte_at@outlook.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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Dawei Li 2022-09-12 22:39:03 +08:00 • committed by Andrew Morton

parent e7fcac4cd2

commit a187094428

1 changed files with 17 additions and 2 deletions

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mm/damon/core.c

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