linux-kernel - Re: [PATCH v2 1/3] mm/zswap: don't return LRU

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Message-ID: <ZbhJnIQRjTn9ME1k@google.com>
Date: Tue, 30 Jan 2024 00:58:04 +0000
From: Yosry Ahmed <yosryahmed@...gle.com>
To: Nhat Pham <nphamcs@...il.com>
Cc: Chengming Zhou <zhouchengming@...edance.com>, Johannes Weiner <hannes@...xchg.org>, 
	Andrew Morton <akpm@...ux-foundation.org>, Chris Li <chriscli@...gle.com>, 
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH v2 1/3] mm/zswap: don't return LRU_SKIP if we have dropped
 lru lock

On Mon, Jan 29, 2024 at 04:12:54PM -0800, Nhat Pham wrote:
> On Mon, Jan 29, 2024 at 4:09 PM Yosry Ahmed <yosryahmed@...gle.com> wrote:
> >
> > On Sun, Jan 28, 2024 at 01:28:49PM +0000, Chengming Zhou wrote:
> > > LRU_SKIP can only be returned if we don't ever dropped lru lock, or
> > > we need to return LRU_RETRY to restart from the head of lru list.
> > >
> > > Otherwise, the iteration might continue from a cursor position that
> > > was freed while the locks were dropped.
> >
> > Does this warrant a stable backport?
> 
> IUC, the zswap shrinker was merged in 6.8, and we're still in the RC's
> for 6.8, right? If this patch goes into 6.8 then no need?
> Otherwise, yeah it should go to 6.8 stable IMHO.

For some reason I thought the shrinker went into v6.7, my bad. Then I
guess it should only go into v6.8.