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Date: Mon, 6 Aug 2001 12:49:52 +0200
From: Andrea Arcangeli <andrea@suse.de>
To: Jakub Jelinek <jakub@redhat.com>
Cc: David Luyer <david_luyer@pacific.net.au>, linux-kernel@vger.kernel.org,
        Linus Torvalds <torvalds@transmeta.com>,
        "David S. Miller" <davem@redhat.com>
Subject: Re: /proc/<n>/maps growing...
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On Mon, Aug 06, 2001 at 06:30:03AM -0400, Jakub Jelinek wrote:
> On Mon, Aug 06, 2001 at 10:59:04AM +0200, Andrea Arcangeli wrote:
> > On Mon, Aug 06, 2001 at 04:41:21PM +1000, David Luyer wrote:
> > > crashes for no apparent reason every 6 hours or so.. unless that could
> > > be when
> > > it hits some 'limit' on the number of mappings allowed? 
> > 
> > there's no limit, this is _only_ a performance issue, functionality is
> > not compromised in any way [except possibly wasting some memory
> > resources that could lead to running out of memory earlier].
> 
> There is a limit, /proc/sys/vm/max_map_count.

in mainline it's not a sysctl, btw.

I never noticed this limit and personally I don't like it regardless of
the merge_segments (but of course without merge_segments it is can
trigger problems while switching between 2.2 and 2.4).

Andrea