linux-kernel - Re: [External] Re: [RFC PATCH] zswap: add writeback_time

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Message-ID: <CACSyD1NYD+JvLSLj-y2c0qdjn2SrTTB3uuezoEjNOPzWkAW0qA@mail.gmail.com>
Date:   Fri, 13 Oct 2023 20:59:16 +0800
From:   贺中坤 <hezhongkun.hzk@...edance.com>
To:     Johannes Weiner <hannes@...xchg.org>
Cc:     Nhat Pham <nphamcs@...il.com>, akpm@...ux-foundation.org,
        yosryahmed@...gle.com, sjenning@...hat.com, ddstreet@...e.org,
        vitaly.wool@...sulko.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [External] Re: [RFC PATCH] zswap: add writeback_time_threshold
 interface to shrink zswap pool

>
> Can you use memory.reclaim itself for that? With Nhat's shrinker, it
> should move the whole pipeline (LRU -> zswap -> swap).
>

Thanks,  I will backport it and have a try.

> In many instances, swapins already free the swap slot through the
> generic swap code (see should_try_to_free_swap()). It matters for
> shared pages, or for swapcaching read-only data when swap isn't full -
> it could be that isn't the case in your tests.

Got it. Thanks for your reply.