Re: [PATCH] Alternate futex non-page-pinning and COW fix

[Linus Torvalds]

On Thu, 4 Sep 2003, Rusty Russell wrote:
> 
> However, Jamie's futex code will see !VM_SHARED on the mapping, and
> compare futexes by mm + uaddr (rather than inode + file offset), so
> this is NOT the case.  Using VM_MAYSHARE instead would make the
> MAP_SHARED readonly case work as above, though.

But that is WORSE!

Now MAP_SHARED works, but MAP_PRIVATE does not. That's still the same bug, 
but now it' san inconsistent bug!

I'd rather have a consistent bug than one that makes no sense.

			Linus

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