locks: adjust loop limit check when waiting for readers
The check was for the exact value, but since the counter started being incremented by the number of readers it could have jumped over.
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cde25ed4cd
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efa9f177f5
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=327402
@ -516,7 +516,7 @@ __rw_rlock_hard(struct rwlock *rw, struct thread *td, uintptr_t v
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#endif
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KTR_STATE0(KTR_SCHED, "thread", sched_tdname(curthread),
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"running");
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if (i != rowner_loops)
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if (i < rowner_loops)
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continue;
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}
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#endif
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@ -995,7 +995,7 @@ __rw_wlock_hard(volatile uintptr_t *c, uintptr_t v LOCK_FILE_LINE_ARG_DEF)
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#ifdef KDTRACE_HOOKS
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lda.spin_cnt += rowner_loops - i;
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#endif
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if (i != rowner_loops)
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if (i < rowner_loops)
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continue;
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sleep_reason = 2;
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}
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@ -671,7 +671,7 @@ _sx_xlock_hard(struct sx *sx, uintptr_t x, int opts LOCK_FILE_LINE_ARG_DEF)
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#endif
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KTR_STATE0(KTR_SCHED, "thread",
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sched_tdname(curthread), "running");
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if (i != asx_loops)
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if (i < asx_loops)
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continue;
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sleep_reason = 2;
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}
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