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Message-ID: <1397249287.2503.24.camel@buesod1.americas.hpqcorp.net>
Subject: Re: [PATCH] ipc,shm: disable shmmax and shmall by default
From: Davidlohr Bueso <davidlohr@hp.com>
Date: Fri, 11 Apr 2014 13:48:07 -0700
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To: Manfred Spraul <manfred@colorfullife.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com>, Andrew Morton <akpm@linux-foundation.org>, aswin@hp.com, LKML <linux-kernel@vger.kernel.org>, "linux-mm@kvack.org" <linux-mm@kvack.org>, Greg Thelen <gthelen@google.com>, Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>

On Fri, 2014-04-11 at 13:27 -0700, Davidlohr Bueso wrote:
> On Fri, 2014-04-11 at 20:28 +0200, Manfred Spraul wrote:
> > Your patch disables checking shmmax, shmall *AND* checking for SHMMIN.
> 
> Right, if shmmax is 0, then there's no point checking for shmmin,
> otherwise we'd always end up returning EINVAL.

Actually that's complete bogus.

Now that I think of it, shmget(key, 0, flg) should still return EINVAL.
That has *nothing* to do with any limits we are changing here and is
simply wrong since the passed size still cannot be less than 1 (shmmin).
I'll update the patch, thanks for pointing this out.

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