On Mon, 2006-06-05 at 16:34 +0100, Russell King wrote: > What has zero copy (your reply) got to do with faulting pages into > userspace (my message). I'm sorry, I don't understand why you've > brought this up. The zero copy case is the case where we end up with user and kernel mappings simultaneously on the page. The nopage (or fault) case is where we end up with them sequentially. Both cases actually require the same cache treatment, but it's easiest to understand in the zero copy case. James - 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: [PATCHSET] block: fix PIO cache coherency bug, take 2
- From: Russell King <[email protected]>
- Re: [PATCHSET] block: fix PIO cache coherency bug, take 2
- References:
- [PATCHSET] block: fix PIO cache coherency bug, take 2
- From: Tejun Heo <[email protected]>
- Re: [PATCHSET] block: fix PIO cache coherency bug, take 2
- From: Russell King <[email protected]>
- Re: [PATCHSET] block: fix PIO cache coherency bug, take 2
- From: Russell King <[email protected]>
- Re: [PATCHSET] block: fix PIO cache coherency bug, take 2
- From: James Bottomley <[email protected]>
- Re: [PATCHSET] block: fix PIO cache coherency bug, take 2
- From: Russell King <[email protected]>
- Re: [PATCHSET] block: fix PIO cache coherency bug, take 2
- From: James Bottomley <[email protected]>
- Re: [PATCHSET] block: fix PIO cache coherency bug, take 2
- From: Russell King <[email protected]>
- [PATCHSET] block: fix PIO cache coherency bug, take 2
- Prev by Date: Re: [uml-devel] Re: [PATCH 2/8] UML - Define jmpbuf access constants
- Next by Date: Re: [PATCHSET] block: fix PIO cache coherency bug, take 2
- Previous by thread: Re: [PATCHSET] block: fix PIO cache coherency bug, take 2
- Next by thread: Re: [PATCHSET] block: fix PIO cache coherency bug, take 2
- Index(es):
 |