Syzbot CI

Subject	ext4: use iomap for regular file's buffered I/O path
Author	yi.zhang@huaweicloud.com
Date	2026-10-09 10:30:02 +0000 UTC
Version
Cc	adilger.kernel@dilger.ca chengzhihao1@huawei.com djwong@kernel.org hch@infradead.org jack@suse.cz libaokun@linux.alibaba.com linux-ext4@vger.kernel.org linux-fsdevel@vger.kernel.org linux-kernel@vger.kernel.org ojaswin@linux.ibm.com ritesh.list@gmail.com tytso@mit.edu wangkefeng.wang@huawei.com yangerkun@huawei.com yi.zhang@huawei.com yi.zhang@huaweicloud.com yizhang089@gmail.com yukuai@fnnas.com

Subject

ext4: use iomap for regular file's buffered I/O path

Author

yi.zhang@huaweicloud.com

Date

2026-10-09 10:30:02 +0000 UTC

Version

adilger.kernel@dilger.ca chengzhihao1@huawei.com djwong@kernel.org hch@infradead.org jack@suse.cz libaokun@linux.alibaba.com linux-ext4@vger.kernel.org linux-fsdevel@vger.kernel.org linux-kernel@vger.kernel.org ojaswin@linux.ibm.com ritesh.list@gmail.com tytso@mit.edu wangkefeng.wang@huawei.com yangerkun@huawei.com yi.zhang@huawei.com yi.zhang@huaweicloud.com yizhang089@gmail.com yukuai@fnnas.com

Name	Content [All]
[PATCH v7 01/31] ext4: simplify size updating in ext4_setattr()	[Body]
[PATCH v7 02/31] ext4: factor out ext4_truncate_[up\|down]()	[Body]
[PATCH v7 03/31] ext4: set EXT4_MAP_NEW flag for delayed allocated blocks	[Body]
[PATCH v7 04/31] ext4: recheck extent status tree before block allocation	[Body]
[PATCH v7 05/31] ext4: fix orig_mlen initialization in ext4_map_blocks()	[Body]
[PATCH v7 06/31] ext4: allow ext4_map_blocks() to start its own transaction handle	[Body]
[PATCH v7 07/31] ext4: avoid unnecessary transaction in ext4_map_blocks() for unwritten extents	[Body]
[PATCH v7 08/31] ext4: skip block allocation for holes in the data submission path	[Body]
[PATCH v7 09/31] ext4: add iomap address space operations for buffered I/O	[Body]
[PATCH v7 10/31] ext4: implement buffered read path using iomap	[Body]
[PATCH v7 11/31] ext4: pass out extent seq counter when mapping da blocks	[Body]
[PATCH v7 12/31] ext4: do not use data=ordered mode for inodes using buffered iomap path	[Body]
[PATCH v7 13/31] ext4: implement buffered write path using iomap	[Body]
[PATCH v7 14/31] ext4: rework handle credit accounting for unwritten extent conversion	[Body]
[PATCH v7 15/31] ext4: implement writeback path using iomap	[Body]
[PATCH v7 16/31] ext4: implement mmap path using iomap	[Body]
[PATCH v7 17/31] ext4: implement partial block zero range path using iomap	[Body]
[PATCH v7 18/31] ext4: drain writeback before removing extents on the iomap path	[Body]
[PATCH v7 19/31] ext4: add block mapping tracepoints for iomap buffered I/O path	[Body]
[PATCH v7 20/31] ext4: disable online defrag when inode using iomap buffered I/O path	[Body]
[PATCH v7 21/31] ext4: add EXT4_STATE_DISKSIZE_GROW_PENDING state bit and helpers	[Body]
[PATCH v7 22/31] ext4: submit and wait for pending disksize-grow I/O on writeback	[Body]
[PATCH v7 23/31] ext4: advance i_disksize to i_size upon disksize-grow I/O completion	[Body]
[PATCH v7 24/31] ext4: defer i_disksize update while DISKSIZE_GROW_PENDING is set	[Body]
[PATCH v7 25/31] ext4: submit and wait for disksize-grow I/O in fallocate paths	[Body]
[PATCH v7 26/31] ext4: clear DISKSIZE_GROW_PENDING on truncate or error	[Body]
[PATCH v7 27/31] ext4: set DISKSIZE_GROW_PENDING after zeroing unaligned EOF block	[Body]
[PATCH v7 28/31] ext4: add tracepoints for DISKSIZE_GROW_PENDING set, clear, and wait	[Body]
[PATCH v7 29/31] ext4: add tracepoints for EOF block zeroing and disksize-grow I/O	[Body]
[PATCH v7 30/31] ext4: partially enable iomap for the buffered I/O path of regular files	[Body]
[PATCH v7 31/31] ext4: introduce a mount option for iomap buffered I/O path	[Body]

Name

Content [All]

[PATCH v7 01/31] ext4: simplify size updating in ext4_setattr()

[PATCH v7 02/31] ext4: factor out ext4_truncate_[up|down]()

[PATCH v7 03/31] ext4: set EXT4_MAP_NEW flag for delayed allocated blocks

[PATCH v7 04/31] ext4: recheck extent status tree before block allocation

[PATCH v7 05/31] ext4: fix orig_mlen initialization in ext4_map_blocks()

[PATCH v7 06/31] ext4: allow ext4_map_blocks() to start its own transaction handle

[PATCH v7 07/31] ext4: avoid unnecessary transaction in ext4_map_blocks() for unwritten extents

[PATCH v7 08/31] ext4: skip block allocation for holes in the data submission path

[PATCH v7 09/31] ext4: add iomap address space operations for buffered I/O

[PATCH v7 10/31] ext4: implement buffered read path using iomap

[PATCH v7 11/31] ext4: pass out extent seq counter when mapping da blocks

[PATCH v7 12/31] ext4: do not use data=ordered mode for inodes using buffered iomap path

[PATCH v7 13/31] ext4: implement buffered write path using iomap

[PATCH v7 14/31] ext4: rework handle credit accounting for unwritten extent conversion

[PATCH v7 15/31] ext4: implement writeback path using iomap

[PATCH v7 16/31] ext4: implement mmap path using iomap

[PATCH v7 17/31] ext4: implement partial block zero range path using iomap

[PATCH v7 18/31] ext4: drain writeback before removing extents on the iomap path

[PATCH v7 19/31] ext4: add block mapping tracepoints for iomap buffered I/O path

[PATCH v7 20/31] ext4: disable online defrag when inode using iomap buffered I/O path

[PATCH v7 21/31] ext4: add EXT4_STATE_DISKSIZE_GROW_PENDING state bit and helpers

[PATCH v7 22/31] ext4: submit and wait for pending disksize-grow I/O on writeback

[PATCH v7 23/31] ext4: advance i_disksize to i_size upon disksize-grow I/O completion

[PATCH v7 24/31] ext4: defer i_disksize update while DISKSIZE_GROW_PENDING is set

[PATCH v7 25/31] ext4: submit and wait for disksize-grow I/O in fallocate paths

[PATCH v7 26/31] ext4: clear DISKSIZE_GROW_PENDING on truncate or error

[PATCH v7 27/31] ext4: set DISKSIZE_GROW_PENDING after zeroing unaligned EOF block

[PATCH v7 28/31] ext4: add tracepoints for DISKSIZE_GROW_PENDING set, clear, and wait

[PATCH v7 29/31] ext4: add tracepoints for EOF block zeroing and disksize-grow I/O

[PATCH v7 30/31] ext4: partially enable iomap for the buffered I/O path of regular files

[PATCH v7 31/31] ext4: introduce a mount option for iomap buffered I/O path

Session 2026-10-09

1 Findings

ID (for dev)	461544c1-a210-41f9-90df-201e2b32f789
Status	finished
Triaged	OK [Log] [Trajectory]
Execution Log	[Link]

Test	Base	Patched	Verdict
[KASAN] Build Base	3d399224425573875b6f6f1181bd8cf9a28cc7d1 [Config]		passed [Log]
[KASAN] Boot test: Base	3d399224425573875b6f6f1181bd8cf9a28cc7d1 [Config]		passed [Log]
[KASAN] Build Patched		3d399224425573875b6f6f1181bd8cf9a28cc7d1 [Config] [patched]	passed [Log]
[KASAN] Boot test: Patched		3d399224425573875b6f6f1181bd8cf9a28cc7d1 [Config] [patched]	passed [Log]
[KASAN] Fuzz	3d399224425573875b6f6f1181bd8cf9a28cc7d1 [Config]	3d399224425573875b6f6f1181bd8cf9a28cc7d1 [Config] [patched]	passed [Log] [Artifacts]
finding AI confirmed WARNING in ext4_do_writepages Log AI Trajectory

Patches (31)

Series Summary

Sessions

Session 2026-10-09