On Wed, 14 Feb 2007, Benjamin LaHaise wrote: > On Wed, Feb 14, 2007 at 01:06:59PM -0800, Davide Libenzi wrote: > > Bear with me Ben, and let's follow this up :) If you are in the middle of > > an MMX copy operation, inside the syscall, you are: > > > > - Userspace, on task A, calls sys_async_exec > > > > - Userspace in _not_ doing any MMX stuff before the call > > That's an incorrect assumption. Every task/thread in the system has FPU > state associated with it, in part due to the fact that glibc has to change > some of the rounding mode bits, making them different than the default from > a freshly initialized state.
IMO I still belive this is not a huge problem. FPU state propagation/copy can be done in a clever way, once we detect the in-async condition. - Davide - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
