From: Jan Glauber <jang@linux.vnet.ibm.com>
Date: Mon, 4 Jan 2010 08:05:42 +0000 (+0100)
Subject: [S390] qdio: convert global statistics to per-device stats
X-Git-Tag: v2.6.33-rc3~9^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6486cda6c6b15368e2c925d89b4e9ed13e67b91b;p=pandora-kernel.git

[S390] qdio: convert global statistics to per-device stats

Revamp the qdio performance statistics and move them from procfs to
debugfs using the seq_file interface. Since the statistics are not
intended for the general user the removal of /proc/qdio_perf should
not surprise anyone.

The per device statistics are disabled by default, writing 1 to
/<debugfs mountpoint>/qdio/<device bus ID>/statistics enables the
statistics for the given device.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

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