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    SubjectRe: 3.4.0-02580-g72c04af regression on sparc64 - partitions not recognized
    On Wed, 23 May 2012, David Miller wrote:

    > From: Meelis Roos <mroos@linux.ee>
    > Date: Wed, 23 May 2012 19:46:46 +0300 (EEST)
    >
    > CC:'ing interested parties.
    >
    > >> > Just tested 3.4.0-02580-g72c04af on about 10 machines. While most of
    > >> > them work (including 3 different sparc64 machines with real scsi disks),
    > >> > Sun Netra X1 with pata_ali and IDE disk consistently fails to boot. sda
    > >> > is recognized but no partitions. 3.3.0 works fine, as did something
    > >> > around 3.4-rc7 (plain 3.4 not tested yet). No other IDE machines tested
    > >> > yet since I have none with remote console at the moment.
    > >>
    > >> If 3.4.0-final is OK, start bisecting from v3.4.0 until 72c04af. One
    > >> possibility could be the sparc64 NOBOOTMEM conversion that went into
    > >> the merge window.
    > >
    > > Bisecting leads to this commit:
    > >
    > > a7a20d103994fd760766e6c9d494daa569cbfe06 is the first bad commit
    > > commit a7a20d103994fd760766e6c9d494daa569cbfe06
    > > Author: Dan Williams <dan.j.williams@intel.com>
    > > Date: Thu Mar 22 17:05:11 2012 -0700
    > >
    > > [SCSI] sd: limit the scope of the async probe domain
    > >
    > > sd injects and synchronizes probe work on the global kernel-wide domain.
    > > This runs into conflict with PM that wants to perform resume actions in
    > > async context:

    ...

    > > Provide a 'scsi_sd_probe_domain' so that async probe actions actions can
    > > be flushed without regard for the state of PM, and allow for the resume
    > > path to handle devices that have transitioned from SDEV_QUIESCE to
    > > SDEV_DEL prior to resume.

    Does reverting just the part of the commit that touches scsi_lib.c make
    any difference?

    If not, does leaving that part in and reverting all the rest of the
    commit make any difference?

    Alan Stern



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