iolog: free io_piece log on thread cleanup#1
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prune_io_piece_log() is called only at the start of each loop iteration, so io_piece entries accumulated during the final do_io() run are never explicitly freed. When fio runs as a process this goes unnoticed because the OS reclaims the heap on exit. When fio is embedded as a pthread (e.g. used as a library), the parent process keeps running, so those allocations become a genuine memory leak proportional to the number of write IOs logged for verify (~112 bytes per io_piece). Fix by calling prune_io_piece_log() in the thread cleanup path before cleanup_io_u(), mirroring the existing call at the top of the run loop. https://claude.ai/code/session_016tpS4vTP5NurWyYqbumnGT
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prune_io_piece_log() is called only at the start of each loop
iteration, so io_piece entries accumulated during the final do_io()
run are never explicitly freed.
When fio runs as a process this goes unnoticed because the OS reclaims
the heap on exit. When fio is embedded as a pthread (e.g. used as a
library), the parent process keeps running, so those allocations become
a genuine memory leak proportional to the number of write IOs logged
for verify (~112 bytes per io_piece).
Fix by calling prune_io_piece_log() in the thread cleanup path before
cleanup_io_u(), mirroring the existing call at the top of the run loop.
https://claude.ai/code/session_016tpS4vTP5NurWyYqbumnGT