From: Christoph Hellwig <hch@infradead.org>
To: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: "Mikulas Patocka" <mpatocka@redhat.com>,
"Askar Safin" <safinaskar@gmail.com>,
linux-mm@kvack.org, linux-pm@vger.kernel.org,
linux-block@vger.kernel.org, linux-crypto@vger.kernel.org,
linux-lvm@lists.linux.dev, lvm-devel@lists.linux.dev,
linux-raid@vger.kernel.org,
DellClientKernel <Dell.Client.Kernel@dell.com>,
dm-devel@lists.linux.dev, linux-btrfs@vger.kernel.org,
"Nhat Pham" <nphamcs@gmail.com>, "Kairui Song" <ryncsn@gmail.com>,
"Pavel Machek" <pavel@ucw.cz>,
"Rodolfo García Peñas" <kix@kix.es>,
"Eric Biggers" <ebiggers@kernel.org>,
"Lennart Poettering" <mzxreary@0pointer.de>,
"Christian Brauner" <brauner@kernel.org>,
"Linus Torvalds" <torvalds@linux-foundation.org>,
"Milan Broz" <milan@mazyland.cz>
Subject: Re: [PATCH] pm-hibernate: flush block device cache when hibernating
Date: Wed, 29 Oct 2025 07:38:13 -0700 [thread overview]
Message-ID: <aQIm1bfwKlwaak52@infradead.org> (raw)
In-Reply-To: <CAJZ5v0gcEjZPVtKrysS=ek7kHpH3afinwY-apKm3Yd4PmKDHdA@mail.gmail.com>
On Wed, Oct 29, 2025 at 02:31:05PM +0100, Rafael J. Wysocki wrote:
> > This commit fixes the suspend code so that it issues flushes before
> > writing the header and after writing the header.
>
> Hmm, shouldn't it flush every time it does a sync write, and not just
> in these two cases?
It certainly should not use the PREFLUSH flag that flushes before
writing, as the cache will be dirty again after that.
I'd expect a single blkdev_issue_flush after all writing is done,
under the assumption that the swsusp swap writing doesn't have
transaction integrity for individual writes anyway.
next prev parent reply other threads:[~2025-10-29 14:38 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-23 11:29 dm bug: hibernate to swap located on dm-integrity doesn't work (how to get data redundancy for swap?) Askar Safin
2025-10-23 20:42 ` Milan Broz
2025-10-24 16:31 ` Askar Safin
2025-10-24 17:50 ` Milan Broz
2025-10-25 5:26 ` Askar Safin
2025-10-27 8:08 ` Askar Safin
[not found] ` <4cd2d217-f97d-4923-b852-4f8746456704@mazyland.cz>
2025-10-24 10:23 ` [PATCH] pm-hibernate: flush block device cache when hibernating Mikulas Patocka
2025-10-27 8:42 ` Askar Safin
2025-10-31 19:29 ` Mikulas Patocka
2025-10-31 19:33 ` [PATCH 1/2] pm-hibernate: flush disk cache when suspending Mikulas Patocka
2025-11-03 15:53 ` Askar Safin
2025-11-22 13:51 ` Milan Broz
2025-11-22 20:33 ` Askar Safin
2025-11-22 22:47 ` Askar Safin
2025-11-24 19:51 ` Mikulas Patocka
2025-10-31 19:35 ` [RFC PATCH 2/2] swsusp: make it possible to hibernate to device mapper devices Mikulas Patocka
2025-11-30 0:56 ` Askar Safin
2025-12-17 23:18 ` Askar Safin
2025-12-22 15:03 ` Milan Broz
2025-12-22 22:24 ` Askar Safin
2025-12-23 1:41 ` Askar Safin
2025-12-23 5:29 ` Askar Safin
2025-12-23 6:33 ` Askar Safin
2026-01-14 7:27 ` Askar Safin
2025-10-29 13:31 ` [PATCH] pm-hibernate: flush block device cache when hibernating Rafael J. Wysocki
2025-10-29 14:38 ` Christoph Hellwig [this message]
2025-10-29 16:31 ` Mikulas Patocka
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