Re: [PATCH] ipc,shm: disable shmmax and shmall by default

From: Davidlohr Bueso
Date: Fri Apr 11 2014 - 16:48:23 EST


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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