Date: Tue, 26 Dec 2017 16:29:40 +0000 (UTC) From: Mark Johnston <markj@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r327213 - head/sys/vm Message-ID: <201712261629.vBQGTed6072925@repo.freebsd.org>
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Author: markj Date: Tue Dec 26 16:29:39 2017 New Revision: 327213 URL: https://svnweb.freebsd.org/changeset/base/327213 Log: Ensure that pass > 0 when starting a scan with vm_pages_needed == 1. Otherwise the page daemon will not reclaim pages and thus will not wake threads sleeping in VM_WAIT. Reported and tested by: pho Reviewed by: alc, kib X-MFC with: r327168 Differential Revision: https://reviews.freebsd.org/D13640 Modified: head/sys/vm/vm_pageout.c Modified: head/sys/vm/vm_pageout.c ============================================================================== --- head/sys/vm/vm_pageout.c Tue Dec 26 16:23:18 2017 (r327212) +++ head/sys/vm/vm_pageout.c Tue Dec 26 16:29:39 2017 (r327213) @@ -1836,6 +1836,8 @@ vm_pageout_worker(void *arg) */ if (vm_pages_needed) { mtx_unlock(&vm_page_queue_free_mtx); + if (pass == 0) + pass++; } else if (mtx_sleep(&vm_pageout_wanted, &vm_page_queue_free_mtx, PDROP | PVM, "psleep", hz) == 0) {
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