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    SubjectRe: [linux-pm] Is it supposed to be ok to call del_gendisk while userspace is frozen?
    On Thu, 13 May 2010, Matt Reimer wrote:

    > > I don't see anything wrong with the patch itself, but I dislike the
    > > description.  Devices can come and go from any hotpluggable bus, not
    > > just MMC/SD.  That just happens to be the first place the problem was
    > > observed.
    >
    > Good point. How about this?
    >
    > Matt
    >
    > From 813bd223e5a2fa577b9e64ddf12654a93d0aab8b Mon Sep 17 00:00:00 2001
    > From: Matt Reimer <mreimer@sdgsystems.com>
    > Date: Thu, 13 May 2010 14:36:54 -0700
    > Subject: [PATCH] fs: prevent hang on suspend/resume when MMC/SD card present
    >
    > Devices can come and go bus during suspend or resume, when the
    > writeback thread is frozen, resulting in a hang. Prevent the hang
    > by thawing the writeback thread in del_gendisk().

    I would have said "the block layer's writeback thread", but this is
    okay.

    Alan Stern

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