linux-kernel - [BUG] uprobe: failed to work on 9pfs

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Message-ID: <54F938B7.20700@huawei.com>
Date:	Fri, 6 Mar 2015 13:18:47 +0800
From:	He Kuang <hekuang@...wei.com>
To:	<a.p.zijlstra@...llo.nl>, <paulus@...ba.org>, <mingo@...hat.com>,
	<acme@...nel.org>, <ericvh@...il.com>, <rminnich@...dia.gov>,
	<lucho@...kov.net>
CC:	<wangnan0@...wei.com>, <linux-kernel@...r.kernel.org>
Subject: [BUG] uprobe: failed to work on 9pfs

Uprobe uses inode address to index all registered uprobes in a
rb_tree, this works well in most filesystems but failed on 9pfs.

9pfs allocate more than one vfs inode to the same file, the inode
address when we create uprobe is not same as the inode address we
run later. As a result, neither perf record nor events/uprobe can
capture the predefined uprobe events.

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