Date: Fri, 21 Oct 2016 19:40:37 +0000 (UTC) From: Mark Johnston <markj@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r307750 - user/alc/PQ_LAUNDRY/sys/vm Message-ID: <201610211940.u9LJebIG036898@repo.freebsd.org>
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Author: markj Date: Fri Oct 21 19:40:37 2016 New Revision: 307750 URL: https://svnweb.freebsd.org/changeset/base/307750 Log: Have madvise(MADV_DONTNEED) move dirty pages to the laundry queue. Previously we would always requeue such pages at the tail of the inactive queue, which would further delay reclamation of a page already in the laundry queue. Discussed with: alc Modified: user/alc/PQ_LAUNDRY/sys/vm/vm_page.c Modified: user/alc/PQ_LAUNDRY/sys/vm/vm_page.c ============================================================================== --- user/alc/PQ_LAUNDRY/sys/vm/vm_page.c Fri Oct 21 19:23:51 2016 (r307749) +++ user/alc/PQ_LAUNDRY/sys/vm/vm_page.c Fri Oct 21 19:40:37 2016 (r307750) @@ -3310,11 +3310,13 @@ vm_page_advise(vm_page_t m, int advice) /* * Place clean pages near the head of the inactive queue rather than * the tail, thus defeating the queue's LRU operation and ensuring that - * the page will be reused quickly. Dirty pages are given a chance to - * cycle once through the inactive queue before becoming eligible for - * laundering. + * the page will be reused quickly. Dirty pages not already in the + * laundry are moved there. */ - _vm_page_deactivate(m, m->dirty == 0); + if (m->dirty == 0) + _vm_page_deactivate(m, TRUE); + else + vm_page_launder(m); } /*
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