Date: Wed, 4 Nov 2009 12:11:01 GMT From: Alexander Motin <mav@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 170157 for review Message-ID: <200911041211.nA4CB1HT016458@repoman.freebsd.org>
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http://p4web.freebsd.org/chv.cgi?CH=170157 Change 170157 by mav@mav_mavtest on 2009/11/04 12:10:45 If several controllers complete requests same time, call swi_sched() only once. Affected files ... .. //depot/projects/scottl-camlock/src/sys/cam/cam_xpt.c#120 edit Differences ... ==== //depot/projects/scottl-camlock/src/sys/cam/cam_xpt.c#120 (text+ko) ==== @@ -4238,6 +4238,7 @@ xpt_done(union ccb *done_ccb) { struct cam_sim *sim; + int first; CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { @@ -4251,10 +4252,12 @@ done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) { mtx_lock(&cam_simq_lock); + first = TAILQ_EMPTY(&cam_simq); TAILQ_INSERT_TAIL(&cam_simq, sim, links); mtx_unlock(&cam_simq_lock); sim->flags |= CAM_SIM_ON_DONEQ; - swi_sched(cambio_ih, 0); + if (first) + swi_sched(cambio_ih, 0); } } }
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