Date: Mon, 8 Aug 2016 01:01:05 +0000 (UTC) From: Alan Cox <alc@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r303820 - user/alc/PQ_LAUNDRY/sys/vm Message-ID: <201608080101.u78115BQ002407@repo.freebsd.org>
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Author: alc Date: Mon Aug 8 01:01:05 2016 New Revision: 303820 URL: https://svnweb.freebsd.org/changeset/base/303820 Log: Avoid division by zero without putting a stop to laundering. Discussed with: markj Modified: user/alc/PQ_LAUNDRY/sys/vm/vm_pageout.c Modified: user/alc/PQ_LAUNDRY/sys/vm/vm_pageout.c ============================================================================== --- user/alc/PQ_LAUNDRY/sys/vm/vm_pageout.c Sun Aug 7 23:04:46 2016 (r303819) +++ user/alc/PQ_LAUNDRY/sys/vm/vm_pageout.c Mon Aug 8 01:01:05 2016 (r303820) @@ -1130,7 +1130,7 @@ vm_pageout_laundry_worker(void *arg) ninact = vm_cnt.v_inactive_count; nlaundry = vm_cnt.v_laundry_count; wakeups = VM_METER_PCPU_CNT(v_pdwakeups); - if (target == 0 && ninact > 0 && wakeups != gen && + if (target == 0 && wakeups != gen && nlaundry * bkgrd_launder_ratio >= ninact) { gen = wakeups; @@ -1152,6 +1152,8 @@ vm_pageout_laundry_worker(void *arg) */ target = vm_cnt.v_free_target - vm_pageout_wakeup_thresh; + if (ninact == 0) + ninact = 1; target = nlaundry * (u_int)target / ninact / 10; if (target == 0) target = 1;
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