Re: VM-related Oops: 2.4.15pre1
Linus Torvalds (firstname.lastname@example.org)
Sun, 18 Nov 2001 18:04:16 -0800 (PST)
On Sun, 18 Nov 2001, Horst von Brand wrote:
> Linus Torvalds <email@example.com> said:
> > And nope, not really. It does use plain stores to page->flags, and I agree
> > that it is ugly, but if the page was locked before calling it, all the
> > stores will be with the PG_lock bit set - and even plain stores _are_
> > documented to be atomic on x86 (and on all other reasonable architectures
> > too).
> Even unaligned stores?
Actually, even unaligned stores (which page->flags is NOT) are atomic,
even if Intel strongly discourages them (for performance reasons if no
others) and there tends to be documentation that doesn't guarantee it.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to firstname.lastname@example.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/