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Message-ID: <20061129134927.4daaa5c9@gondolin.boeblingen.de.ibm.com> Date: Wed, 29 Nov 2006 13:49:27 +0100 From: Cornelia Huck <cornelia.huck@...ibm.com> To: Andrew Morton <akpm@...l.org> Cc: Martin Schwidefsky <schwidefsky@...ibm.com>, linux-kernel <linux-kernel@...r.kernel.org> Subject: [Patch -mm 2/2] s390: Update cio documentation. From: Cornelia Huck <cornelia.huck@...ibm.com> Update documentation for dynamic subchannel mapping. Signed-off-by: Cornelia Huck <cornelia.huck@...ibm.com> --- Documentation/s390/driver-model.txt | 7 +++++++ 1 files changed, 7 insertions(+) --- linux-2.6-CH.orig/Documentation/s390/driver-model.txt +++ linux-2.6-CH/Documentation/s390/driver-model.txt @@ -18,11 +18,18 @@ devices/ - 0.0.0002/ - 0.1.0000/0.1.1234/ ... + - defunct/ In this example, device 0815 is accessed via subchannel 0 in subchannel set 0, device 4711 via subchannel 1 in subchannel set 0, and subchannel 2 is a non-I/O subchannel. Device 1234 is accessed via subchannel 0 in subchannel set 1. +The subchannel named 'defunct' does not represent any real subchannel on the +system; it is a pseudo subchannel where disconnnected ccw devices are moved to +if they are displaced by another ccw device becoming operational on their +former subchannel. The ccw devices will be moved again to a proper subchannel +if they become operational again on that subchannel. + You should address a ccw device via its bus id (e.g. 0.0.4711); the device can be found under bus/ccw/devices/. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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