Re: VM-related Oops: 2.4.15pre1

[Linus Torvalds]

On Sun, 18 Nov 2001, Horst von Brand wrote:
> Linus Torvalds <[e-mail]> 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.

		Linus