Re: (subset) [PATCH v3 1/2] writeback: Wake up waiting tasks when finishing the writeback of a chunk.

[Christian Brauner <brauner@kernel.org>]

On Tue, 30 Sep 2025 14:56:36 +0800, Julian Sun wrote:
> Writing back a large number of pages can take a lots of time.
> This issue is exacerbated when the underlying device is slow or
> subject to block layer rate limiting, which in turn triggers
> unexpected hung task warnings.
> 
> We can trigger a wake-up once a chunk has been written back and the
> waiting time for writeback exceeds half of
> sysctl_hung_task_timeout_secs.
> This action allows the hung task detector to be aware of the writeback
> progress, thereby eliminating these unexpected hung task warnings.
> 
> [...]

Applied to the vfs-6.19.writeback branch of the vfs/vfs.git tree.
Patches in the vfs-6.19.writeback branch should appear in linux-next soon.

Please report any outstanding bugs that were missed during review in a
new review to the original patch series allowing us to drop it.

It's encouraged to provide Acked-bys and Reviewed-bys even though the
patch has now been applied. If possible patch trailers will be updated.

Note that commit hashes shown below are subject to change due to rebase,
trailer updates or similar. If in doubt, please check the listed branch.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git
branch: vfs-6.19.writeback

[1/2] writeback: Wake up waiting tasks when finishing the writeback of a chunk.
      https://git.kernel.org/vfs/vfs/c/334b83b3ed81