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sched: Simplify sched_lend_user_prio_cond()

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If 'td_lend_user_pri' has the expected value, there is no need to check
the fields that sched_lend_user_prio() modifies, they either are already
good or soon will be ('td->td_lend_user_pri' has just been changed by
a concurrent update).

Reviewed by:            kib
Approved by:            emaste (mentor)
MFC after:              2 weeks
Sponsored by:           The FreeBSD Foundation
Differential Revision:  https://reviews.freebsd.org/D44050
This commit is contained in:
Olivier Certner 2024-02-09 19:03:22 +01:00
parent 39e4665c96
commit aeff15b392
No known key found for this signature in database
GPG key ID: 8CA13040971E2627
2 changed files with 4 additions and 16 deletions
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10
sys/kern/sched_4bsd.c
View file

@ -981,15 +981,9 @@ void
sched_lend_user_prio_cond(struct thread *td, u_char prio)
{
if (td->td_lend_user_pri != prio)
goto lend;
if (td->td_user_pri != min(prio, td->td_base_user_pri))
goto lend;
if (td->td_priority != td->td_user_pri)
goto lend;
return;
if (td->td_lend_user_pri == prio)
return;
lend:
thread_lock(td);
sched_lend_user_prio(td, prio);
thread_unlock(td);

10
sys/kern/sched_ule.c
View file

@ -2007,15 +2007,9 @@ void
sched_lend_user_prio_cond(struct thread *td, u_char prio)
{
if (td->td_lend_user_pri != prio)
goto lend;
if (td->td_user_pri != min(prio, td->td_base_user_pri))
goto lend;
if (td->td_priority != td->td_user_pri)
goto lend;
return;
if (td->td_lend_user_pri == prio)
return;
lend:
thread_lock(td);
sched_lend_user_prio(td, prio);
thread_unlock(td);