From: Andrew Morton <akpm@linux-foundation.org>
To: Wei Xu <weixugc@google.com>
Cc: Yu Zhao <yuzhao@google.com>, Brian Geffon <bgeffon@google.com>,
Jan Alexander Steffens <heftig@archlinux.org>,
Suleiman Souhlal <suleiman@google.com>,
Axel Rasmussen <axelrasmussen@google.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] mm/mglru: reset page lru tier bits when activating
Date: Mon, 14 Oct 2024 16:27:30 -0700 [thread overview]
Message-ID: <20241014162730.fc48f2a53b89639a6207ba9d@linux-foundation.org> (raw)
In-Reply-To: <20241014221231.832959-1-weixugc@google.com>
On Mon, 14 Oct 2024 22:12:31 +0000 Wei Xu <weixugc@google.com> wrote:
> folio_activate() calls lru_gen_add_folio() to move the folio to the
> youngest generation. But unlike folio_update_gen()/folio_inc_gen(),
> lru_gen_add_folio() doesn't reset the folio lru tier bits
> (LRU_REFS_MASK | LRU_REFS_FLAGS). Fix this inconsistency in
> lru_gen_add_folio() when activating a folio.
What are the runtime effects of this flaw?
next prev parent reply other threads:[~2024-10-14 23:27 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-14 22:12 Wei Xu
2024-10-14 23:27 ` Andrew Morton [this message]
2024-10-14 23:47 ` Wei Xu
2024-10-16 4:55 ` Yu Zhao
2024-10-16 22:55 ` Andrew Morton
2024-10-17 18:21 ` Wei Xu
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