On 01/26/2014 06:10 PM, H. Peter Anvin wrote: > On 01/26/2014 05:55 PM, Ren Qiaowei wrote: >> >> Peter, you mean we should remove these two call and do what they do in >> user-space, right? >> > > Unless we think there is a benefit to the kernel to have a on/off switch > for the #BR exception (if disabled, all #BR exceptions are signals, > regardless of source.)
Yes. For example, wouldn't UML want to have all of this stuff disabled? Presumably it would much prefer to receive the exception directly. The same goes for seccomp users -- as it currently stands, this code allows mmap without a system call. This probably means that the prctl should (optionally) take a parameter that fixes the address of the L1 table -- seccomp users would probably want that. (Actually, everyone might -- this is going to have weird results if the L1 table moves.) --Andy > > There might be, would like other people's opinion. > > -hpa > > -- 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/
