Date: Tue, 21 Nov 2017 13:17:40 +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: r326055 - head/sys/vm Message-ID: <201711211317.vALDHeMc073976@repo.freebsd.org>
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Author: markj Date: Tue Nov 21 13:17:40 2017 New Revision: 326055 URL: https://svnweb.freebsd.org/changeset/base/326055 Log: Allow for fictitious physical pages in vm_page_scan_contig(). Some drm2 drivers will set PG_FICTITIOUS in physical pages in order to satisfy the OBJT_MGTDEVICE object interface, so a scan may encounter fictitous pages. For now, allow for this possibility; such pages will be skipped later in the scan since they are wired. Reported by: avg Reviewed by: kib MFC after: 1 week Modified: head/sys/vm/vm_page.c Modified: head/sys/vm/vm_page.c ============================================================================== --- head/sys/vm/vm_page.c Tue Nov 21 10:19:33 2017 (r326054) +++ head/sys/vm/vm_page.c Tue Nov 21 13:17:40 2017 (r326055) @@ -2065,8 +2065,10 @@ vm_page_scan_contig(u_long npages, vm_page_t m_start, run_len = 0; m_mtx = NULL; for (m = m_start; m < m_end && run_len < npages; m += m_inc) { - KASSERT((m->flags & (PG_FICTITIOUS | PG_MARKER)) == 0, - ("page %p is PG_FICTITIOUS or PG_MARKER", m)); + KASSERT((m->flags & PG_MARKER) == 0, + ("page %p is PG_MARKER", m)); + KASSERT((m->flags & PG_FICTITIOUS) == 0 || m->wire_count == 1, + ("fictitious page %p has invalid wire count", m)); /* * If the current page would be the start of a run, check its
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