Re: [PATCH 1/6] ksm: limiting the num of mem regions user can register per fd.

Rik van Riel
2009-05-03T02:12:38Z

On Sun, 3 May 2009 01:16:07 +0300
Izik Eidus <ieidus@redhat.com> wrote:

> Right now user can open /dev/ksm fd and register unlimited number of
> regions, such behavior may allocate unlimited amount of kernel memory
> and get the whole host into out of memory situation.

How many times can a process open /dev/ksm?

If a process can open /dev/ksm a thousand times and then
register 1000 regions through each file descriptor, this
patch does not help all that much...

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