On 11/11/20 9:17 AM, huang ying wrote:
On Thu, Nov 5, 2020 at 4:56 PM Alex Shi wrote:
From: Hugh Dickins
It is necessary for page_idle_get_page() to recheck PageLRU() after
get_page_unless_zero(), but holding lru_lock around that serves no
useful purpose, and adds to lru_lock contention: del
On Thu, Nov 5, 2020 at 4:56 PM Alex Shi wrote:
>
> From: Hugh Dickins
>
> It is necessary for page_idle_get_page() to recheck PageLRU() after
> get_page_unless_zero(), but holding lru_lock around that serves no
> useful purpose, and adds to lru_lock contention: delete it.
>
> See https://lore.ker
On Thu, Nov 05, 2020 at 04:55:37PM +0800, Alex Shi wrote:
> From: Hugh Dickins
>
> It is necessary for page_idle_get_page() to recheck PageLRU() after
> get_page_unless_zero(), but holding lru_lock around that serves no
> useful purpose, and adds to lru_lock contention: delete it.
>
> See https:
From: Hugh Dickins
It is necessary for page_idle_get_page() to recheck PageLRU() after
get_page_unless_zero(), but holding lru_lock around that serves no
useful purpose, and adds to lru_lock contention: delete it.
See https://lore.kernel.org/lkml/20150504031722.GA2768@blaptop for the
discussion
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