On 09/11/2014 03:32 PM, Dave Hansen wrote: > On 09/11/2014 03:18 PM, Thomas Gleixner wrote: >> On Thu, 11 Sep 2014, Qiaowei Ren wrote: >>> This patch sets bound violation fields of siginfo struct in #BR >>> exception handler by decoding the user instruction and constructing >>> the faulting pointer. >>> >>> This patch does't use the generic decoder, and implements a limited >>> special-purpose decoder to decode MPX instructions, simply because the >>> generic decoder is very heavyweight not just in terms of performance >>> but in terms of interface -- because it has to. >> >> And why is that an argument to add another special purpose decoder? > > Peter asked for it to be done this way specifically: > > https://lkml.org/lkml/2014/6/19/411 > Specifically because marshaling the data in and out of the generic decoder was more complex than a special-purpose decoder. -hpa -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>