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Re: [PATCH 5/5] uio: Implement hotunplug support, using libunload

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From: Hans J. Koch
Subject: Re: [PATCH 5/5] uio: Implement hotunplug support, using libunload
Date: Monday, October 4, 2010 - 5:34 am

On Sun, Sep 26, 2010 at 03:49:03PM -0700, Eric W. Biederman wrote:

Well, that I/O error can also be a segfault if userspace accesses
memory previously mmap'ed. So a userspace program needs to properly
handle -EIO from read(), and has to handle SIG_SEGV. This should also
be mentioned in Documentation/DocBook/uio-howto.tmpl.
Or do you have a better solution?

Thanks,
Hans

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Messages in current thread:
[PATCH 0/5] Uio enhancements, Eric W. Biederman, (Tue Sep 14, 11:35 am)
[PATCH 1/5] uio: Fix lack of locking in init_uio_class, Eric W. Biederman, (Tue Sep 14, 11:36 am)
[PATCH 2/5] uio: Don't clear driver data, Eric W. Biederman, (Tue Sep 14, 11:36 am)
[PATCH 3/5] uio: Cleanup irq handling., Eric W. Biederman, (Tue Sep 14, 11:37 am)
[PATCH 4/5] uio: Support 2^MINOR_BITS minors, Eric W. Biederman, (Tue Sep 14, 11:38 am)
[PATCH 5/5] uio: Statically allocate uio_class and use cla ..., Eric W. Biederman, (Tue Sep 14, 11:38 am)
Re: [PATCH 1/5] uio: Fix lack of locking in init_uio_class, Thomas Gleixner, (Fri Sep 17, 1:32 pm)
Re: [PATCH 2/5] uio: Don't clear driver data, Thomas Gleixner, (Fri Sep 17, 1:33 pm)
Re: [PATCH 3/5] uio: Cleanup irq handling., Thomas Gleixner, (Fri Sep 17, 1:34 pm)
Re: [PATCH 4/5] uio: Support 2^MINOR_BITS minors, Thomas Gleixner, (Fri Sep 17, 1:36 pm)
Re: [PATCH 5/5] uio: Statically allocate uio_class and use ..., Thomas Gleixner, (Fri Sep 17, 1:37 pm)
Re: [PATCH 1/5] uio: Fix lack of locking in init_uio_class, Hans J. Koch, (Fri Sep 17, 1:49 pm)
Re: [PATCH 2/5] uio: Don't clear driver data, Hans J. Koch, (Fri Sep 17, 1:50 pm)
Re: [PATCH 3/5] uio: Cleanup irq handling., Hans J. Koch, (Fri Sep 17, 1:51 pm)
Re: [PATCH 4/5] uio: Support 2^MINOR_BITS minors, Hans J. Koch, (Fri Sep 17, 1:57 pm)
Re: [PATCH 5/5] uio: Statically allocate uio_class and use ..., Hans J. Koch, (Fri Sep 17, 1:57 pm)
Re: [PATCH 0/5] Uio enhancements, Hans J. Koch, (Fri Sep 17, 1:59 pm)
Re: [PATCH 4/5] uio: Support 2^MINOR_BITS minors, Greg KH, (Fri Sep 17, 2:09 pm)
[PATCH 0/5] uio hotplug support, Eric W. Biederman, (Mon Sep 20, 12:19 am)
[PATCH 1/5] uio: Simplify the lifetime logic of struct uio ..., Eric W. Biederman, (Mon Sep 20, 12:21 am)
[PATCH 2/5] uio: Kill unused vma_count., Eric W. Biederman, (Mon Sep 20, 12:21 am)
[PATCH 3/5] uio: Remove unused uio_info mmap method., Eric W. Biederman, (Mon Sep 20, 12:23 am)
[PATCH 4/5] libunload: A library to help remove open files, Eric W. Biederman, (Mon Sep 20, 12:23 am)
[PATCH 5/5] uio: Implement hotunplug support, using libunload, Eric W. Biederman, (Mon Sep 20, 12:24 am)
Re: [PATCH 4/5] uio: Support 2^MINOR_BITS minors, Greg KH, (Tue Sep 21, 2:08 pm)
Re: [PATCH 4/5] uio: Support 2^MINOR_BITS minors, Thomas Gleixner, (Tue Sep 21, 2:38 pm)
Re: [PATCH 4/5] uio: Support 2^MINOR_BITS minors, Greg KH, (Tue Sep 21, 2:56 pm)
Re: [PATCH 4/5] uio: Support 2^MINOR_BITS minors, Eric W. Biederman, (Tue Sep 21, 3:21 pm)
Re: [PATCH 4/5] uio: Support 2^MINOR_BITS minors, Thomas Gleixner, (Tue Sep 21, 3:26 pm)
Re: [PATCH 0/5] uio hotplug support, Hans J. Koch, (Fri Sep 24, 3:45 am)
Re: [PATCH 5/5] uio: Implement hotunplug support, using li ..., Hans J. Koch, (Fri Sep 24, 3:55 am)
Re: [PATCH 5/5] uio: Implement hotunplug support, using li ..., Eric W. Biederman, (Fri Sep 24, 10:11 am)
Re: [PATCH 0/5] uio hotplug support, Eric W. Biederman, (Fri Sep 24, 10:14 am)
Re: [PATCH 0/5] uio hotplug support, Hans J. Koch, (Fri Sep 24, 10:31 am)
Re: [PATCH 0/5] uio hotplug support, Eric W. Biederman, (Fri Sep 24, 11:38 am)
Re: [PATCH 0/5] uio hotplug support, Eric W. Biederman, (Fri Sep 24, 5:05 pm)
Re: [PATCH 0/5] uio hotplug support, Greg KH, (Fri Sep 24, 5:33 pm)
Re: [PATCH 0/5] uio hotplug support, Eric W. Biederman, (Fri Sep 24, 6:54 pm)
[PATCH] uio: Fix accidentally changed return value in uio_read, Eric W. Biederman, (Fri Sep 24, 7:06 pm)
Re: [PATCH 0/5] uio hotplug support, Greg KH, (Sun Sep 26, 12:21 pm)
[PATCH 1/5] uio: Simplify the lifetime logic of struct uio ..., Eric W. Biederman, (Sun Sep 26, 3:46 pm)
[PATCH 2/5] uio: Kill unused vma_count., Eric W. Biederman, (Sun Sep 26, 3:47 pm)
[PATCH 3/5] uio: Remove unused uio_info mmap method., Eric W. Biederman, (Sun Sep 26, 3:48 pm)
[PATCH 4/5] libunload: A library to help remove open files, Eric W. Biederman, (Sun Sep 26, 3:48 pm)
[PATCH 5/5] uio: Implement hotunplug support, using libunload, Eric W. Biederman, (Sun Sep 26, 3:49 pm)
[PATCH 6/5] uio: Fix accidentally changed return value in ..., Eric W. Biederman, (Sun Sep 26, 3:49 pm)
Re: [PATCH 1/5] uio: Simplify the lifetime logic of struct ..., Hans J. Koch, (Thu Sep 30, 3:00 pm)
Re: [PATCH 3/5] uio: Remove unused uio_info mmap method., Hans J. Koch, (Mon Oct 4, 2:26 am)
Re: [PATCH 4/5] libunload: A library to help remove open files, Hans J. Koch, (Mon Oct 4, 2:56 am)
Re: [PATCH 5/5] uio: Implement hotunplug support, using li ..., Hans J. Koch, (Mon Oct 4, 3:47 am)
Re: [PATCH 5/5] uio: Implement hotunplug support, using li ..., Hans J. Koch, (Mon Oct 4, 5:34 am)
Re: [PATCH 5/5] uio: Implement hotunplug support, using li ..., Eric W. Biederman, (Mon Oct 4, 11:19 am)
Re: [PATCH 5/5] uio: Implement hotunplug support, using li ..., Hans J. Koch, (Mon Oct 4, 11:52 am)