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authorOleg Nesterov <[email protected]>2024-01-22 16:50:50 +0100
committerAndrew Morton <[email protected]>2024-02-07 21:20:32 -0800
commitdaa694e4137571b4ebec330f9a9b4d54aa8b8089 (patch)
treec5455af304fd2066d7b44e9ca6279aa6f7520a32 /lib/test_fortify/write_overflow-strncpy-src.c
parente656c7a9e59607d1672d85ffa9a89031876ffe67 (diff)
getrusage: move thread_group_cputime_adjusted() outside of lock_task_sighand()
Patch series "getrusage: use sig->stats_lock", v2. This patch (of 2): thread_group_cputime() does its own locking, we can safely shift thread_group_cputime_adjusted() which does another for_each_thread loop outside of ->siglock protected section. This is also preparation for the next patch which changes getrusage() to use stats_lock instead of siglock, thread_group_cputime() takes the same lock. With the current implementation recursive read_seqbegin_or_lock() is fine, thread_group_cputime() can't enter the slow mode if the caller holds stats_lock, yet this looks more safe and better performance-wise. Link: https://lkml.kernel.org/r/[email protected] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Oleg Nesterov <[email protected]> Reported-by: Dylan Hatch <[email protected]> Tested-by: Dylan Hatch <[email protected]> Cc: Eric W. Biederman <[email protected]> Cc: <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
Diffstat (limited to 'lib/test_fortify/write_overflow-strncpy-src.c')
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