Re:Why Intel is adding instructions to speed up non-volatile...
by signa11 on Thursday November 06, 2014 @06:52AM
(#8566623)
well, the same is true now as well right ? for example, a buggy driver can override a buffer-cache pointer with something else, and then you are hosed. if you are playing in the kernel-land and not careful enough, you are courting disaster...
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Re:Why Intel is adding instructions to speed up non-volatile...
by 0x0 on Thursday November 06, 2014 @11:10AM
(#8567641)
True, but if it overruns a buffer, it still needs to maintain a valid SCSI/ATAPI/whatever command packet format and submit the packet to the controller with repeatedly increasing block numbers - that's a lot of instructions, while something that clears the entire address space could probably be done in 1-2 assembly instructions (mov rcx, -1; rep stosq)