Linus Torvalds writes: > > If you ask me, the need for mmiowb on some platforms merely shows that > > those platforms' implementations of spinlocks and read*/write* are > > buggy... > > You could also state that same as > > "If you ask me, the need for mmiowb on some platforms merely shows > that those platforms perform like a bat out of hell, and I think > they should be slower" > > because the fact is, x86 memory barrier rules are just about optimal for > performance. ... and x86 mmiowb is a no-op. It's not x86 that I think is buggy. Paul. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
- Follow-Ups:
- Re: [PATCH] Document Linux's memory barriers [try #2]
- From: Linus Torvalds <[email protected]>
- Re: [PATCH] Document Linux's memory barriers [try #2]
- References:
- Re: [PATCH] Document Linux's memory barriers [try #2]
- From: Linus Torvalds <[email protected]>
- Re: [PATCH] Document Linux's memory barriers [try #2]
- From: Alan Cox <[email protected]>
- Re: [PATCH] Document Linux's memory barriers [try #2]
- From: Alan Cox <[email protected]>
- Re: [PATCH] Document Linux's memory barriers [try #2]
- From: Alan Cox <[email protected]>
- [PATCH] Document Linux's memory barriers
- From: David Howells <[email protected]>
- [PATCH] Document Linux's memory barriers [try #2]
- From: David Howells <[email protected]>
- Re: [PATCH] Document Linux's memory barriers [try #2]
- From: David Howells <[email protected]>
- Re: [PATCH] Document Linux's memory barriers [try #2]
- From: David Howells <[email protected]>
- Re: [PATCH] Document Linux's memory barriers [try #2]
- From: David Howells <[email protected]>
- Re: [PATCH] Document Linux's memory barriers [try #2]
- From: David Howells <[email protected]>
- Re: [PATCH] Document Linux's memory barriers [try #2]
- From: Paul Mackerras <[email protected]>
- Re: [PATCH] Document Linux's memory barriers [try #2]
- From: Linus Torvalds <[email protected]>
- Re: [PATCH] Document Linux's memory barriers [try #2]
- Prev by Date: Re: problem with duplicate sysfs directories and files
- Next by Date: Re: [PATCH] Document Linux's memory barriers [try #2]
- Previous by thread: Re: [PATCH] Document Linux's memory barriers [try #2]
- Next by thread: Re: [PATCH] Document Linux's memory barriers [try #2]
- Index(es):
 |