Date: Thu, 13 May 2004 13:00:43 -0700 (PDT) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern subr_sleepqueue.c Message-ID: <200405132000.i4DK0hS5046144@repoman.freebsd.org>
next in thread | raw e-mail | index | archive | help
jhb 2004/05/13 13:00:43 PDT
FreeBSD src repository
Modified files:
sys/kern subr_sleepqueue.c
Log:
Split sleepq_wakeup_thread() into two functions. sleepq_remove_thread()
removes a specific thread from a sleep queue. sleepq_resume_thread()
resumes scheduling of a thread that has been previously removed from a
sleep queue.
- sleepq_catch_signals() just removes a thread from the queue it was just
added to when a pending signal is found.
- sleepq_signal() and sleepq_broadcast() remove threads from a queue,
drop the queue lock, and then resume all the previously removed threads.
This doesn't completely fix the sched_lock <-> sleepq chain LOR, but it
makes it a little better as we no longer call setrunnble() with a sleep
queue lock held meaning if setrunnable() tries to wakeup the swapper we
don't try to lock two sleep queue chains at the same time.
Revision Changes Path
1.6 +50 -13 src/sys/kern/subr_sleepqueue.c
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200405132000.i4DK0hS5046144>