linux-kernel - Re: [PATCH -next 2/3] mm/zswap: delay the initializaton of zswap until the first enablement

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Message-Id: <20220826184328.3bce63050a1f82e9242580df@linux-foundation.org>
Date:   Fri, 26 Aug 2022 18:43:28 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Nathan Chancellor <nathan@...nel.org>
Cc:     Liu Shixin <liushixin2@...wei.com>,
        Seth Jennings <sjenning@...hat.com>,
        Dan Streetman <ddstreet@...e.org>,
        Vitaly Wool <vitaly.wool@...sulko.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next 2/3] mm/zswap: delay the initializaton of zswap
 until the first enablement

On Fri, 26 Aug 2022 13:25:41 -0700 Nathan Chancellor <nathan@...nel.org> wrote:

> Hi Liu,
> 
> On Thu, Aug 25, 2022 at 10:20:36PM +0800, Liu Shixin wrote:
> > In the initialization of zswap, about 18MB memory will be allocated for
> > zswap_pool in my machine. Since not all users use zswap, the memory may be
> > wasted. Save the memory for these users by delaying the initialization of
> > zswap to first enablement.
> > 
>
> ...
>
> This change is in -next as commit 22100432cf14 ("mm/zswap: delay the
> initializaton of zswap until the first enablement"). I just bisected my
> arm64 test system running Fedora failing to boot due to that commit,
> with the following stack trace:
> 

Thanks.  Sorry.  I dropped the series.