Re: [PATCH RFC] x86: avoid atomic operation in test_and_set_bit_lock if possible

Eric Dumazet
2011-03-25T09:38:10Z

Le vendredi 25 mars 2011 à 06:47 +0100, Eric Dumazet a écrit :

> I tried many different changes in BIOS and all failed (the machine is
> damn slow at boot, this takes age).

I even tried on a more recent hardware (ProLiant BL460c G7)

BIOS : Version: I27 Release Date: 09/30/2010

[ 0.021849] CPU0: Intel(R) Xeon(R) CPU E5640 @ 2.67GHz stepping 02
[ 0.123904] Performance Events: PEBS fmt1+, Westmere events, Broken BIOS detected, using software events only.
[ 0.124125] [Firmware Bug]: the BIOS has corrupted hw-PMU resources (MSR 38d is 330)

I guess I'll have to patch my kernel, I doubt HP will make any change in this area.