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- Change the wakeup logic associated with having multiple sleepers

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on multiple different audit pipes.  The old method used cv_signal()
  which would result in only one thread being woken up after we
  appended a record to it's queue.  This resulted in un-timely wake-ups
  when processing audit records real-time.

- Assign PSOCK priority to threads that have been sleeping on a read(2).
  This is the same priority threads are woken up with when they select(2)
  or poll(2).  This yields fairness between various forms of sleep on
  the audit pipes.

Obtained from:	TrustedBSD Project
Discussed with:	rwatson
MFC after:	1 week
This commit is contained in:
Christian S.J. Peron 2007-10-12 15:09:02 +00:00
parent 50ed6e0713
commit 24f4142c18
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=172583
1 changed files with 2 additions and 2 deletions
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4
sys/security/audit/audit_pipe.c
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@ -466,7 +466,7 @@ audit_pipe_submit(au_id_t auid, au_event_t event, au_class_t class, int sorf,
}
audit_pipe_records++;
mtx_unlock(&audit_pipe_mtx);
cv_signal(&audit_pipe_cv);
cv_broadcastpri(&audit_pipe_cv, PSOCK);
}
/*
@ -493,7 +493,7 @@ audit_pipe_submit_user(void *record, u_int record_len)
audit_pipe_append(ap, record, record_len);
audit_pipe_records++;
mtx_unlock(&audit_pipe_mtx);
cv_signal(&audit_pipe_cv);
cv_broadcastpri(&audit_pipe_cv, PSOCK);
}