Re: patch for 2.1.90 net/core/iovec et al

H. Peter Anvin (hpa@transmeta.com)
25 Mar 1998 00:34:40 GMT

Followup to: <m0yHZeI-000aQ2C@the-village.bc.nu>
By author: alan@lxorguk.ukuu.org.uk (Alan Cox)
In newsgroup: linux.dev.kernel
>
> 2.0.x preserves the read position when you get an EFAULT. Nothing I can find
> in the holy manual of posix says what happens if you get an EFAULT on a tcp
> operation, so I think we can do what we like.
>

In fact, POSIX doesn't distinguish between system calls and library
functions, so according to POSIX it is perfectly valid to throw
SIGSEGV instead of return EFAULT. Personally, I think there should be
a kernel option to turn EFAULT into SIGSEGV, because that's really
what it is -- a segfault where the access happens to be from kernel
space.

-hpa

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