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Date:	Sat, 13 Oct 2007 00:10:27 -0700
From:	Paul Jackson <>
To:	Jens Axboe <>
Cc:	Andrew Morton <>,
	Matthew Wilcox <>,
	FUJITA Tomonori <>,
	Anil S Keshavamurthy <>,
	Vladimir Saveliev <>,
	Edward Shishkin <>,
	linux-kernel <>

The git-block patches in 2.6.23-mm1 freeze my ia64 SN Altix hard on boot.
Not good (tm).

Something broke between the git-block patch of Sept 26 in 2.6.23-rc8-mm2
and the git-block patches of Oct 10-11 in 2.6.23-mm1 on my ia64 SN Altix
system using sn2_defconfig.

Bisecting 2.6.23-mm1 narrows the problem down to the git-block patches:


I can boot 2.6.23-rc8-mm2 fine, but I freeze early in boot
on 2.6.23-mm1, after the following prints on the console:

    McKinley Errata 9 workaround not needed; disabling it
    SLUB: Genslabs=26, HWalign=128, Order=0-2, MinObjects=8, CPUs=8, Nodes=1024
    Dentry cache hash table entries: 1048576 (order: 9, 8388608 bytes)
    Inode-cache hash table entries: 524288 (order: 8, 4194304 bytes)
    Mount-cache hash table entries: 1024
    ACPI: Core revision 20070126
    Boot processor id 0x0/0x0
    Brought up 8 CPUs
    Total of 8 processors activated (15564.80 BogoMIPS).

The next output that I -would- have expected, based on successful boots
without these patches, but never get, is:

    net_namespace: 120 bytes
    DMI not present or invalid.
    xor: measuring software checksum speed
       ia64      :  2692.000 MB/sec
    xor: using function: ia64 (2692.000 MB/sec)
    NET: Registered protocol family 16
    ACPI  DSDT OEM Rev 0x20101

                  I won't rest till it's the best ...
                  Programmer, Linux Scalability
                  Paul Jackson <> 1.925.600.0401
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