linux-kernel - max_user_watches overflows on 16TB system.

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Message-ID: <20101001200143.GR14064@sgi.com>
Date:	Fri, 1 Oct 2010 15:01:43 -0500
From:	Robin Holt <holt@....com>
To:	Davide Libenzi <davidel@...ilserver.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Pekka Enberg <penberg@...helsinki.fi>
Cc:	linux-kernel@...r.kernel.org
Subject: max_user_watches overflows on 16TB system.

Following a boot of a 16TB system, we noticed that the max_user_watches
sysctl was negative.  Is there any downside to converting that to a
static long and handling the fallout from the change?  I believe that
fallout includes changing the definition of epoll_watches over to an
atomic_long_t as well.

Alternatively should we just limit max_user_watches to INT_MAX?

Thanks,
Robin Holt
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