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    SubjectRe: swsusp regression [Was: 2.6.18-rc3-mm2]
    Rafael J. Wysocki wrote:
    > On Monday 07 August 2006 18:23, Jason Lunz wrote:
    >> In gmane.linux.kernel, you wrote:
    >>>> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.18-rc3/2.6.18-rc3-mm2/
    >>> I tried it and guess what :)... swsusp doesn't work :@.
    >>>
    >>> This time I was able to dump process states with sysrq-t:
    >>> http://www.fi.muni.cz/~xslaby/sklad/ide2.gif
    >>>
    >>> My guess is ide2/2.0 dies (hpt370 driver), since last thing kernel prints is
    >>> suspending device 2.0
    >> Does it go away if you revert this?
    >> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.18-rc3/2.6.18-rc3-mm2/broken-out/ide-reprogram-disk-pio-timings-on-resume.patch
    >>
    >> That should only affect resume, not suspend, but it does mess around
    >> with ide power management. Is this maybe happening on the *second*
    >> suspend?
    >>
    >>> -hdc: ATAPI 63X DVD-ROM DVD-R CD-R/RW drive, 2048kB Cache, UDMA(33)
    >>> +hdc: ATAPI CD-ROM drive, 0kB Cache, UDMA(33)
    >> This looks suspicious. -mm does have several ide-fix-hpt3xx patches.
    >
    > I found that git-block.patch broke the suspend for me. Still have no idea
    > what's up with it.

    I suspect elevator changes. The wait_for_completion is not woken in ide-io by
    ll_rw_blk. But I don't understand block layer too much. Where the
    blk_end_sync_rq should be called from (why is not called at all)?

    regards,
    --
    <a href="http://www.fi.muni.cz/~xslaby/">Jiri Slaby</a>
    faculty of informatics, masaryk university, brno, cz
    e-mail: jirislaby gmail com, gpg pubkey fingerprint:
    B674 9967 0407 CE62 ACC8 22A0 32CC 55C3 39D4 7A7E
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