From: Anton Blanchard <anton@samba.org>
To: Greg KH <gregkh@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Wu Fengguang <fengguang.wu@intel.com>,
Andi Kleen <ak@linux.intel.com>,
Kay Sievers <kay.sievers@vrfy.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] devmem: Handle class_create() failure
Date: Sat, 3 Apr 2010 13:03:42 +1100 [thread overview]
Message-ID: <20100403020342.GJ5594@kryten> (raw)
In-Reply-To: <20100402165324.GD32081@suse.de>
Hi Greg,
> Is this something that we need for .34? How were you getting this to
> fail in the first place?
I hit this when we broke the IDR allocator for a few days. The bug got
introduced in commit 859ddf09743a8cc680af33f7259ccd0fd36bfe9d (idr: fix a
critical misallocation bug), and was backed out a few days later in commit
6f14a668f1a8b715a6e855f4e32705e54a6e86a1 (idr: revert misallocation bug fix).
The sysfs inode allocator which uses IDR was getting back a bogus ENOSPC
return code. I think the chances of seeing this fail otherwise would be pretty
remote, you'd have to use up 2^31 sysfs inodes before hitting the real IDR
limit.
Anton
prev parent reply other threads:[~2010-04-03 2:06 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-02 7:29 [PATCH] devmem: Handle class_create() failure Anton Blanchard
2010-04-02 7:36 ` Wu Fengguang
2010-04-02 16:53 ` Greg KH
2010-04-03 2:03 ` Anton Blanchard [this message]
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