linux-kernel - [PATCH 0/4] ext4: replace ext4_es_insert_extent() when caching on-disk extents

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20251031062905.4135909-1-yi.zhang@huaweicloud.com>
Date: Fri, 31 Oct 2025 14:29:01 +0800
From: Zhang Yi <yi.zhang@...weicloud.com>
To: linux-ext4@...r.kernel.org
Cc: linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	tytso@....edu,
	adilger.kernel@...ger.ca,
	jack@...e.cz,
	yi.zhang@...wei.com,
	yi.zhang@...weicloud.com,
	libaokun1@...wei.com,
	yangerkun@...wei.com
Subject: [PATCH 0/4] ext4: replace ext4_es_insert_extent() when caching on-disk extents

From: Zhang Yi <yi.zhang@...wei.com>

This series addresses the optimization that Jan pointed out [1]
regarding the introduction of a sequence number to
ext4_es_insert_extent(). The proposal is to replace all instances where
the cache of on-disk extents is updated by using ext4_es_cache_extent()
instead of ext4_es_insert_extent(). This change can prevent excessive
cache invalidations caused by unnecessarily increasing the extent
sequence number when reading from the on-disk extent tree. This seires
has no dependency on the patch set[2] that introduced the extent
sequence number, so it can be merged independently.

[1] https://lore.kernel.org/linux-ext4/ympvfypw3222g2k4xzd5pba4zhkz5jihw4td67iixvrqhuu43y@wse63ntv4s6u/
[2] https://lore.kernel.org/linux-ext4/20251013015128.499308-1-yi.zhang@huaweicloud.com/

Thanks,
Yi.

Zhang Yi (4):
  ext4: make ext4_es_cache_extent() support overwrite existing extents
  ext4: check for conflicts when caching extents
  ext4: adjust the debug info in ext4_es_cache_extent()
  ext4: replace ext4_es_insert_extent() when caching on-disk extents

 fs/ext4/extents.c        |  8 ++---
 fs/ext4/extents_status.c | 75 +++++++++++++++++++++++++++++++++++-----
 fs/ext4/extents_status.h |  2 +-
 fs/ext4/inode.c          | 18 +++++-----
 4 files changed, 81 insertions(+), 22 deletions(-)

-- 
2.46.1