Messages in this thread | | | Date | Mon, 11 May 2015 22:47:19 -0700 | From | "H. Peter Anvin" <> | Subject | Re: VERIFY_READ/WRITE in uaccess.h? |
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On 05/11/2015 02:42 PM, Linus Torvalds wrote: > > That one - for the same reasons - also checked the actual accesses, > not just that the range was in user mode. Exactly because it needed to > pre-COW the pages (even if that was then obviously racy in threaded > environments - in practice it worked, and we tried to support the > fundamentally broken i386 hardware protection model for a long time). >
It worked in part because we never supported SMP on i386.
-hpa
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