[Backport v4.3-branch] logging: fix starvation caused by uncommitted message#107141
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[Backport v4.3-branch] logging: fix starvation caused by uncommitted message#107141github-actions[bot] wants to merge 1 commit intov4.3-branchfrom
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Fix a scenario where the logging thread can enter an infinite loop and starve lower-priority threads when encountering an uncommitted log message. If a lower-priority thread is preempted before committing a message, and a higher-priority thread triggers log processing, the logging thread may repeatedly attempt to claim it. Since the message is pending but not committed, z_log_msg_claim() returns NULL while z_log_msg_pending() remains true, resulting in a livelock. Update the log processing logic to avoid looping on uncommitted messages, allowing lower-priority threads to resume and complete the commit. Fixes #101401 Signed-off-by: Javier Romera <lromerajdev@gmail.com> (cherry picked from commit 5184eac)
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jhedberg
approved these changes
Apr 20, 2026
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Backport 5184eac from #106908.
Fixes #101401