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SubjectRe: 2.3.14 shared mem in /proc/memnfo is zero
On Fri, 20 Aug 1999, Oleg Drokin wrote:

>So what is the new meaning of MemShared?

nothing. To calc such information we should do a O(N) algorithm scanning
all the mem_map array. Now si_meminfo runs in O(1). You have less
information but after all the shared counter is just been screwed up by
the page-buffer cache unification of 2.3.x since most page-cache pages now
have the page count > 1 even if they live in cache (and they are not
mapped in userspace memory).
I am not the author of such change but I sure agree with it. (for
debugging you have the shared information in SYSRQ+M, SYSRQ+M runs in O(N)
as usual of course ;).


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