lkml.org 
[lkml]   [2003]   [Mar]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [BK-2.5] Move "used FPU status" into new non-atomic thread_info->status field.
Linus Torvalds writes:
> > Sorry for being dense, but can you clarify: will current 2.{2,4,5}
> > kernels preserve or destroy the parent process' FPU control at fork()?
>
> They're guaranteed to preserve the control state (it has to: you can't
> just change the exception mask over a function call). However, that was
> buggy at least in 2.5.x, and very possibly in 2.4.x too - haven't checked.

Thanks. Our use of unmasked FPU exceptions should be safe then, unless
2.4 also has the bug you fixed in 2.5.

/Mikael
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:33    [W:0.072 / U:0.880 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site