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SubjectRe: [PATCH] fs: drop_caches: skip dropping pagecache which is always dirty
On Wed, Jul 20, 2022 at 02:21:19AM +0000, cgel.zte@gmail.com wrote:
> From: Yang Yang <yang.yang29@zte.com.cn>
>
> Pagecache of some kind of fs has PG_dirty bit set once it was
> allocated, so it can't be dropped. These fs include ramfs and
> tmpfs. This can make drop_pagecache_sb() more efficient.

Why do we want to make drop_pagecache_sb() more efficient?

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