Date: Tue, 13 Apr 2021 17:01:49 +0300 From: Andriy Gapon <avg@FreeBSD.org> To: Mark Johnston <markj@freebsd.org> Cc: freebsd-stable List <stable@freebsd.org>, FreeBSD Current <current@freebsd.org> Subject: Re: stable/13, vm page counts do not add up Message-ID: <dd0a979f-8a50-ab28-9701-0a8cddc9471b@FreeBSD.org> In-Reply-To: <YG4ckaRbub6kEFO8@nuc> References: <0606571f-fec0-c7ad-98e8-a0b8554918e2@FreeBSD.org> <YG4OAVa0ohh4illU@nuc> <f509bf54-e283-eb29-2db2-1457dae7bc13@FreeBSD.org> <YG4ckaRbub6kEFO8@nuc>
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On 07/04/2021 23:56, Mark Johnston wrote: > I don't know what might be causing it then. It could be a page leak. > The kernel allocates wired pages without adjusting the v_wire_count > counter in some cases, but the ones I know about happen at boot and > should not account for such a large disparity. I do not see it on a few > systems that I have access to. Mark or anyone, do you have a suggestion on how to approach hunting for the potential page leak? It's been a long while since I worked with that code and it changed a lot. Here is some additional info. I had approximately 2 million unaccounted pages. I rebooted the system and that number became 20 thousand which is more reasonable and could be explained by those boot-time allocations that you mentioned. After 30 hours of uptime the number became 60 thousand. I monitored the number and so far I could not correlate it with any activity. P.S. I have not been running any virtual machines. I do use nvidia graphics driver. -- Andriy Gapon
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