Messages in this thread | | | From | "H. Peter Anvin" <> | Subject | Re: [PATCH] Document Linux's memory barriers | Date | Thu, 9 Mar 2006 16:49:01 -0800 (PST) |
| |
Followup to: <28393.1141823992@warthog.cambridge.redhat.com> By author: David Howells <dhowells@redhat.com> In newsgroup: linux.dev.kernel > > However, on i386, for example, you've actually got at least two different I/O > access domains, and I don't know how they impinge upon each other (IN/OUT vs > MOV). >
You do, but those aren't the ones.
What you have is instead MOVNT versus everything else. IN/OUT are total sledgehammers, as they imply not only nonposted operation, but the instruction implies wait for completion; this is required since IN/OUT support emulation via SMI.
-hpa - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |