From: Herbert Xu <herbert@gondor.apana.org.au>
To: Chris Li <chrisl@kernel.org>
Cc: Barry Song <21cnbao@gmail.com>, SeongJae Park <sj@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Chengming Zhou <chengming.zhou@linux.dev>,
Johannes Weiner <hannes@cmpxchg.org>,
Nhat Pham <nphamcs@gmail.com>,
Yosry Ahmed <yosry.ahmed@linux.dev>,
kernel-team@meta.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, Takero Funaki <flintglass@gmail.com>,
David Hildenbrand <david@redhat.com>, Baoquan He <bhe@redhat.com>,
Kairui Song <kasong@tencent.com>
Subject: Re: [PATCH v4] mm/zswap: store <PAGE_SIZE compression failed page as-is
Date: Wed, 20 Aug 2025 13:22:50 +0800 [thread overview]
Message-ID: <aKVbqi6wd3Spz-TM@gondor.apana.org.au> (raw)
In-Reply-To: <CAF8kJuPPsLzWu8+xm2A_UPHMBhb7OTjJNErM1Kp3hPmvHXNDUQ@mail.gmail.com>
On Tue, Aug 19, 2025 at 10:20:45PM -0700, Chris Li wrote:
>
> In that case it is fair game for the caller to check for the error
> other than -ENOSPC. If the return value is -EINPROGRESS during
> synchronous crypto compression, it is a bug. We are not encouraged to
> use WARN_ON, then having an error count to check that something truly
> unlikely but possible to happen is better than folding it into
> incompressible and pretend the error never happened. At least we can
> know such an error case happened.
Sure warning on -EINPROGRESS is fine. But every other non-zero
return value should be treated as incompressible.
Cheers,
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
next prev parent reply other threads:[~2025-08-20 5:23 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-19 19:34 SeongJae Park
2025-08-20 1:13 ` Barry Song
2025-08-20 1:20 ` Herbert Xu
2025-08-20 1:34 ` Barry Song
2025-08-20 1:37 ` Herbert Xu
2025-08-20 17:32 ` Nhat Pham
2025-08-21 10:27 ` Barry Song
2025-08-21 16:42 ` SeongJae Park
2025-08-21 20:49 ` Chris Li
2025-08-21 21:36 ` SeongJae Park
2025-08-22 0:48 ` Barry Song
2025-08-22 5:54 ` Herbert Xu
2025-08-22 7:30 ` Barry Song
2025-08-22 16:44 ` SeongJae Park
2025-08-20 5:07 ` Chris Li
2025-08-20 5:10 ` Herbert Xu
2025-08-20 5:20 ` Chris Li
2025-08-20 5:22 ` Herbert Xu [this message]
2025-08-21 20:42 ` Chris Li
2025-08-20 4:55 ` Chris Li
2025-08-20 4:49 ` Chris Li
2025-08-21 16:17 ` SeongJae Park
2025-08-21 21:21 ` Chris Li
2025-08-21 21:41 ` SeongJae Park
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