From: sashiko-bot@kernel.org
To: "Usama Arif" <usama.arif@linux.dev>
Cc: linux-s390@vger.kernel.org, "Heiko Carstens" <hca@linux.ibm.com>,
"Vasily Gorbik" <gor@linux.ibm.com>,
"Alexander Gordeev" <agordeev@linux.ibm.com>,
"Christian Borntraeger" <borntraeger@linux.ibm.com>
Subject: Re: [PATCH v9 06/32] s390: mm: add PMD swap-exclusive helpers
Date: Fri, 06 Nov 2026 18:43:04 +0000 [thread overview]
Message-ID: <sashiko-outbox-202061@kernel.org> (raw)
In-Reply-To: <20261105183940.2236717-7-usama.arif@linux.dev>
> Prepare for keeping a PMD-mapped anonymous THP mapped by a PMD across the
> swap round-trip, which makes PG_anon_exclusive have to survive in a swap
> PMD and not just in a swap PTE.
>
> s390 is the one architecture where a swap PMD is not a swap PTE in
> disguise: it is an RSTE with its own layout, converted to a fake PTE swap
> entry for the common code. Give it its own exclusive bit rather than
> borrowing the PTE-format macro, and document it in the RSTE swap layout,
> where bit 52 was listed as unused.
>
> Cc: Alexander Gordeev <agordeev@linux.ibm.com>
> Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
> Cc: Heiko Carstens <hca@linux.ibm.com>
> Cc: Vasily Gorbik <gor@linux.ibm.com>
> Cc: linux-s390@vger.kernel.org
> Signed-off-by: Usama Arif <usama.arif@linux.dev>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261105183940.2236717-1-usama.arif@linux.dev?part=6
next prev parent reply other threads:[~2026-11-06 18:43 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20261105183940.2236717-1-usama.arif@linux.dev>
2026-11-05 18:38 ` [PATCH v9 06/32] s390: mm: add PMD swap-exclusive helpers Usama Arif
2026-11-06 18:43 ` sashiko-bot [this message]
2026-11-10 17:17 ` Gerald Schaefer
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