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Set laundry flag when transitioning an inactive page from clean to dirty.
This fixes a performance bug where pages would sometimes not be paged out when they could be. Submitted by: John Dyson
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=4447
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@ -65,7 +65,7 @@
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*
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* $Id: vm_pageout.c,v 1.23 1994/10/25 05:35:44 davidg Exp $
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* $Id: vm_pageout.c,v 1.24 1994/11/06 05:07:53 davidg Exp $
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*/
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/*
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@ -631,8 +631,10 @@ vm_pageout_scan()
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continue;
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}
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if (((m->flags & PG_CLEAN) != 0) && pmap_is_modified(VM_PAGE_TO_PHYS(m)))
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if (((m->flags & PG_CLEAN) != 0) && pmap_is_modified(VM_PAGE_TO_PHYS(m))) {
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m->flags &= ~PG_CLEAN;
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m->flags |= PG_LAUNDRY;
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}
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if (((m->flags & PG_REFERENCED) == 0) && pmap_is_referenced(VM_PAGE_TO_PHYS(m))) {
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m->flags |= PG_REFERENCED;
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