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Date: Sun, 15 Sep 2002 10:23:24 -0700 (PDT)
From: "M. Edward (Ed) Borasky" <znmeb@aracnet.com>
To: William Lee Irwin III <wli@holomorphy.com>
cc: Andrew Morton <akpm@digeo.com>, Dave Hansen <haveblue@us.ibm.com>,
       "Martin J. Bligh" <Martin.Bligh@us.ibm.com>,
       <linux-kernel@vger.kernel.org>, <linux-mm@kvack.org>
Subject: Re: [PATCH] add vmalloc stats to meminfo
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On Sun, 15 Sep 2002, William Lee Irwin III wrote:

> Dave Hansen wrote:
> >>  It is often hard to tell
> >> whether this is because the area is too small, or just too fragmented.  This
> LDT's were formerly allocated in vmallocspace. This presented difficulties
> with many simultaneous threaded applications. Also, given that there is
> zero vmallocspace OOM recovery now present in the kernel some method of
> monitoring this aspect of system behavior up until the point of failure is
> useful for detecting further problem areas (LDT's were addressed by using
> non-vmalloc allocations).
>
> Also, dynamic vmalloc allocations may very well be starved by boot-time
> allocations on systems where much vmallocspace is required for IO memory.
> The failure mode of such is effectively deadlock, since they block
> indefinitely waiting for permanent boot-time allocations to be freed up.


Thank you!! How difficult would it be to back-port this to 2.4.18?

--
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