From: Rik van Riel <riel@surriel.com>
To: Izik Eidus <ieidus@redhat.com>
Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
aarcange@redhat.com, chrisw@redhat.com, alan@lxorguk.ukuu.org.uk,
device@lanana.org, linux-mm@kvack.org, hugh@veritas.com,
nickpiggin@yahoo.com.au
Subject: Re: [PATCH 1/6] ksm: limiting the num of mem regions user can register per fd.
Date: Sat, 2 May 2009 22:08:29 -0400 [thread overview]
Message-ID: <20090502220829.392b7ff9@riellaptop.surriel.com> (raw)
In-Reply-To: <1241302572-4366-2-git-send-email-ieidus@redhat.com>
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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next prev parent reply other threads:[~2009-05-03 2:09 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-02 22:16 [PATCH 0/6] ksm changes Izik Eidus
2009-05-02 22:16 ` [PATCH 1/6] ksm: limiting the num of mem regions user can register per fd Izik Eidus
2009-05-02 22:16 ` [PATCH 2/6] ksm: dont allow overlap memory addresses registrations Izik Eidus
2009-05-02 22:16 ` [PATCH 3/6] ksm: change the KSM_REMOVE_MEMORY_REGION ioctl Izik Eidus
2009-05-02 22:16 ` [PATCH 4/6] ksm: change the prot handling to use the generic helper functions Izik Eidus
2009-05-02 22:16 ` [PATCH 5/6] ksm: build system make it compile for all archs Izik Eidus
2009-05-02 22:16 ` [PATCH 6/6] ksm: use another miscdevice minor number Izik Eidus
2009-05-04 19:43 ` [PATCH 3/6] ksm: change the KSM_REMOVE_MEMORY_REGION ioctl Hugh Dickins
2009-05-04 20:37 ` Izik Eidus
2009-05-03 2:08 ` Rik van Riel [this message]
2009-05-03 9:06 ` [PATCH 1/6] ksm: limiting the num of mem regions user can register per fd Izik Eidus
2009-05-03 2:08 ` Rik van Riel
2009-05-04 22:25 [PATCH 0/6] ksm changes (v2) Izik Eidus
2009-05-04 22:25 ` [PATCH 1/6] ksm: limiting the num of mem regions user can register per fd Izik Eidus
2009-05-06 0:40 ` Rik van Riel
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