Re: [PATCH v4 2/2] mm: hugetlb: proc: add HugetlbPages field to /proc/PID/status

From: Jörn Engel
Date: Thu Aug 13 2015 - 17:14:26 EST

On Thu, Aug 13, 2015 at 12:45:33AM +0000, Naoya Horiguchi wrote:
> From: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
> Subject: [PATCH] mm: hugetlb: proc: add HugetlbPages field to /proc/PID/status
> Currently there's no easy way to get per-process usage of hugetlb pages, which
> is inconvenient because userspace applications which use hugetlb typically want
> to control their processes on the basis of how much memory (including hugetlb)
> they use. So this patch simply provides easy access to the info via
> /proc/PID/status.
> With this patch, for example, /proc/PID/status shows a line like this:
> HugetlbPages: 20480 kB (10*2048kB)
> If your system supports and enables multiple hugepage sizes, the line looks
> like this:
> HugetlbPages: 1069056 kB (1*1048576kB 10*2048kB)
> , so you can easily know how many hugepages in which pagesize are used by a
> process.
> Signed-off-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>

Acked-by: Joern Engel <joern@xxxxxxxxx>


Computer system analysis is like child-rearing; you can do grievous damage,
but you cannot ensure success."
-- Tom DeMarco
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