From: Christoph Hellwig <hch@lst.de>
To: Andrey Albershteyn <aalbersh@kernel.org>
Cc: linux-xfs@vger.kernel.org, fsverity@lists.linux.dev,
linux-fsdevel@vger.kernel.org, ebiggers@kernel.org, hch@lst.de,
linux-ext4@vger.kernel.org,
linux-f2fs-devel@lists.sourceforge.net,
linux-btrfs@vger.kernel.org, djwong@kernel.org
Subject: Re: [PATCH v13 05/23] fsverity: improve flushing performance of fsverity_fill_zerohash
Date: Fri, 24 Jul 2026 15:13:09 +0200 [thread overview]
Message-ID: <20260724131309.GA27878@lst.de> (raw)
In-Reply-To: <20260721184346.416657-6-aalbersh@kernel.org>
On Tue, Jul 21, 2026 at 08:40:42PM +0200, Andrey Albershteyn wrote:
> The current version calls flush_dcache_folio(), in memcpy_to_folio(), to
> flush whole folio on every digest (which is 128 for 4k). Open code folio
> mapping and flushing to copy all digests at once.
What is the point of this? flush_dcache_folio is a no-op on sane
architectures, and this should not be a performance path, so
avoiding all the kmap logic does seem benefitial. Or at least only
opencode it for !highmem to avoid the worst part.
next prev parent reply other threads:[~2026-07-24 13:13 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-21 18:40 [PATCH v13 00/23] fs-verity support for XFS with post EOF merkle tree Andrey Albershteyn
2026-07-21 18:40 ` [PATCH v13 01/23] fsverity: report validation errors through fserror to fsnotify Andrey Albershteyn
2026-07-21 18:40 ` [PATCH v13 02/23] fsverity: expose ensure_fsverity_info() Andrey Albershteyn
2026-07-21 18:40 ` [PATCH v13 03/23] fsverity: pass digest size and hash of the all-zeroes block to ->write Andrey Albershteyn
2026-07-21 18:40 ` [PATCH v13 04/23] fsverity: hoist pagecache_read from f2fs/ext4 to fsverity Andrey Albershteyn
2026-07-21 18:40 ` [PATCH v13 05/23] fsverity: improve flushing performance of fsverity_fill_zerohash Andrey Albershteyn
2026-07-24 13:13 ` Christoph Hellwig [this message]
2026-07-21 18:40 ` [PATCH v13 06/23] fsverity: don't allow setting DAX file attribute on fsverity files Andrey Albershteyn
2026-07-24 13:13 ` Christoph Hellwig
2026-07-24 14:19 ` Eric Biggers
2026-07-21 18:40 ` [PATCH v13 07/23] fs,fsverity: remove check for fsverity being enabled in setattr_prepare() Andrey Albershteyn
2026-07-24 13:14 ` Christoph Hellwig
2026-07-21 18:40 ` [PATCH v13 08/23] fsverity: hoist statx reporting of fs-verity flag Andrey Albershteyn
2026-07-21 18:40 ` [PATCH v13 09/23] xfs: introduce fsverity on-disk changes Andrey Albershteyn
2026-07-21 18:40 ` [PATCH v13 10/23] xfs: don't allow to enable DAX on fs-verity sealed inode Andrey Albershteyn
2026-07-21 18:40 ` [PATCH v13 11/23] xfs: disable direct read path for fs-verity files Andrey Albershteyn
2026-07-24 13:16 ` Christoph Hellwig
2026-07-21 18:40 ` [PATCH v13 12/23] xfs: don't report dio_mem_align and dio_offset_align for fsverity files Andrey Albershteyn
2026-07-21 18:40 ` [PATCH v13 13/23] xfs: handle fsverity I/O in write/read path Andrey Albershteyn
2026-07-21 18:40 ` [PATCH v13 14/23] xfs: always prioritize fsverity metadata ioends in ioend completion Andrey Albershteyn
2026-07-21 18:40 ` [PATCH v13 15/23] xfs: use read ioend for fsverity data verification Andrey Albershteyn
2026-07-21 18:40 ` [PATCH v13 16/23] xfs: add fs-verity support Andrey Albershteyn
2026-07-24 13:17 ` Christoph Hellwig
2026-07-21 18:40 ` [PATCH v13 17/23] xfs: remove unwritten extents after preallocations in fsverity metadata Andrey Albershteyn
2026-07-24 13:20 ` Christoph Hellwig
2026-07-21 18:40 ` [PATCH v13 18/23] xfs: initialize fs-verity on file open Andrey Albershteyn
2026-07-21 18:40 ` [PATCH v13 19/23] xfs: add fs-verity ioctls Andrey Albershteyn
2026-07-21 18:40 ` [PATCH v13 20/23] xfs: advertise fs-verity being available on filesystem Andrey Albershteyn
2026-07-21 18:40 ` [PATCH v13 21/23] xfs: check and repair the verity inode flag state Andrey Albershteyn
2026-07-21 18:40 ` [PATCH v13 22/23] xfs: introduce health state for corrupted fsverity metadata Andrey Albershteyn
2026-07-21 18:41 ` [PATCH v13 23/23] xfs: enable ro-compat fs-verity flag Andrey Albershteyn
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260724131309.GA27878@lst.de \
--to=hch@lst.de \
--cc=aalbersh@kernel.org \
--cc=djwong@kernel.org \
--cc=ebiggers@kernel.org \
--cc=fsverity@lists.linux.dev \
--cc=linux-btrfs@vger.kernel.org \
--cc=linux-ext4@vger.kernel.org \
--cc=linux-f2fs-devel@lists.sourceforge.net \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-xfs@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox