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f050da08a4
Currently, wait_event_timeout() in drm_wait_one_vblank() uses a 100ms timeout. Under heavy scheduling pressure or rare delayed vblank handling, this can trigger WARNs unnecessarily. Increase the timeout to 1000ms to reduce spurious WARNs, while still catching genuine issues. Reported-by: syzbot+147ba789658184f0ce04@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=147ba789658184f0ce04 Tested-by: syzbot+147ba789658184f0ce04@syzkaller.appspotmail.com Signed-off-by: Chintan Patel <chintanlike@gmail.com> v2: - Dropped unnecessary in-code comment (suggested by Thomas Zimmermann) - Removed else branch, only log timeout case v3: - Replaced drm_dbg_kms()/manual logging with drm_err() (suggested by Ville Syrjälä) - Removed unnecessary curr = drm_vblank_count() (suggested by Thomas Zimmermann) - Fixed commit message wording ("invalid userspace calls" → "delayed vblank handling") v4: - Keep the original drm_WARN() to catch genuine kernel issues - Increased timeout from 100ms → 1000ms to reduce spurious WARNs (suggested by Thomas Zimmermann) Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patch.msgid.link/20251028034337.6341-1-chintanlike@gmail.com |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.