Date: Tue, 20 Oct 2015 15:59:46 -0600 From: Ian Lepore <ian@freebsd.org> To: freebsd-hackers <freebsd-hackers@FreeBSD.org> Subject: vmstat -m strangeness Message-ID: <1445378386.14127.2.camel@freebsd.org>
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root@wand:~ # vmstat -m | egrep "busdma|bounce|devbuf|Type"
Type InUse MemUse HighUse Requests Size(s)
devbuf 125 10K - 166 16,32,64,256,512,1024
busdma 922 116K - 922 128
bounce 385 775K - 385 32,128
How do 385 allocations of 32 or 128 bytes add up to 775K? The
answer... 768K of individual pages each allocated via contigmalloc() do
n't show up in that output. Why is that, and is it something that
should be fixed?
-- Ian
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