On Wed, Mar 04, 2015 at 08:06:51PM +0100, Oleg Nesterov wrote: > Thanks. I'll try to investigate tomorrow. > > Well, the kernel crashes because xrstor_state() is buggy, Quentin already > has a fix. > > But #GP should be explained...
Could it be one of those conditions for which XRSTORS #GPs, like "If XRSTORS attempts to load MXCSR with an illegal value, a general-protection exception (#GP) occurs." for example? I'm looking at the SDM section for XRSTORS. I mean, math_state_restore() does init_fpu() and down that road we're allocating an FPU state ... but we did init_fpu() before too, in eager_fpu_init(). So what changed? Maybe I'm looking in a totally wrong direction, it is too late here to stare at FPU code anyway... Thanks. -- Regards/Gruss, Boris. ECO tip #101: Trim your mails when you reply. -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/