Re: [PATCHSET] block: fix PIO cache coherency bug, take 2

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]>

• 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]>

• 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):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]