On Mon, 2007-07-16 at 17:03 -0500, James Bottomley wrote:
> On Tue, 2007-07-17 at 07:49 +1000, Benjamin Herrenschmidt wrote:
> > > No ... that was the point of flush_kernel_dcache_page(). The page in
> > > question is page cache backed and contains user mappings. However, the
> > > block layer ha
On Tue, 2007-07-17 at 07:49 +1000, Benjamin Herrenschmidt wrote:
> > No ... that was the point of flush_kernel_dcache_page(). The page in
> > question is page cache backed and contains user mappings. However, the
> > block layer has already done a flush_dcache_page() in get_user_pages()
> > and t
> No ... that was the point of flush_kernel_dcache_page(). The page in
> question is page cache backed and contains user mappings. However, the
> block layer has already done a flush_dcache_page() in get_user_pages()
> and the user shouldn't be touching memory under I/O (unless they want
> self
On Mon, 2007-07-16 at 08:47 -0500, James Bottomley wrote:
>
> No ... that was the point of flush_kernel_dcache_page(). The page in
> question is page cache backed and contains user mappings. However,
> the
> block layer has already done a flush_dcache_page() in get_user_pages()
> and the user sh
> Upon closer look, while flush_kernel_dcache_page() is a no-op on ppc64,
> flush_dcache_page() isn't. So I'd prefer to not call it if not really needed.
>
> And according to James, flush_kernel_dcache_page() should be sufficient...
>
> So I'm getting puzzled again...
flush_dcache_page() handle
On Mon, 16 Jul 2007, Jens Axboe wrote:
> On Mon, Jul 16 2007, James Bottomley wrote:
> > On Mon, 2007-07-16 at 14:16 +0200, Jens Axboe wrote:
> > > On Mon, Jul 16 2007, Geert Uytterhoeven wrote:
> > > > On Fri, 13 Jul 2007, Geert Uytterhoeven wrote:
> > > > > Ah, that explains it. flush_dcache_page
On Mon, Jul 16 2007, James Bottomley wrote:
> On Mon, 2007-07-16 at 14:16 +0200, Jens Axboe wrote:
> > On Mon, Jul 16 2007, Geert Uytterhoeven wrote:
> > > On Fri, 13 Jul 2007, Geert Uytterhoeven wrote:
> > > > Ah, that explains it. flush_dcache_page() is used in some drivers.
> > > > I'll update m
On Mon, 2007-07-16 at 14:16 +0200, Jens Axboe wrote:
> On Mon, Jul 16 2007, Geert Uytterhoeven wrote:
> > On Fri, 13 Jul 2007, Geert Uytterhoeven wrote:
> > > Ah, that explains it. flush_dcache_page() is used in some drivers.
> > > I'll update my patches. Thanks for the comments!
> >
> > Does this
On Mon, Jul 16 2007, Geert Uytterhoeven wrote:
> On Mon, 16 Jul 2007, Geert Uytterhoeven wrote:
> > On Mon, 16 Jul 2007, Jens Axboe wrote:
> > > On Mon, Jul 16 2007, Geert Uytterhoeven wrote:
> > > > On Fri, 13 Jul 2007, Geert Uytterhoeven wrote:
> > > > > Ah, that explains it. flush_dcache_page()
On Mon, 16 Jul 2007, Geert Uytterhoeven wrote:
> On Mon, 16 Jul 2007, Jens Axboe wrote:
> > On Mon, Jul 16 2007, Geert Uytterhoeven wrote:
> > > On Fri, 13 Jul 2007, Geert Uytterhoeven wrote:
> > > > Ah, that explains it. flush_dcache_page() is used in some drivers.
> > > > I'll update my patches.
On Mon, Jul 16 2007, Geert Uytterhoeven wrote:
> On Mon, 16 Jul 2007, Jens Axboe wrote:
> > On Mon, Jul 16 2007, Geert Uytterhoeven wrote:
> > > On Fri, 13 Jul 2007, Geert Uytterhoeven wrote:
> > > > Ah, that explains it. flush_dcache_page() is used in some drivers.
> > > > I'll update my patches.
On Mon, 16 Jul 2007, Jens Axboe wrote:
> On Mon, Jul 16 2007, Geert Uytterhoeven wrote:
> > On Fri, 13 Jul 2007, Geert Uytterhoeven wrote:
> > > Ah, that explains it. flush_dcache_page() is used in some drivers.
> > > I'll update my patches. Thanks for the comments!
> >
> > Does this look OK?
> >
On Mon, Jul 16 2007, Geert Uytterhoeven wrote:
> On Fri, 13 Jul 2007, Geert Uytterhoeven wrote:
> > Ah, that explains it. flush_dcache_page() is used in some drivers.
> > I'll update my patches. Thanks for the comments!
>
> Does this look OK?
> - Replaced KM_USER0 by KM_IRQ0 (all routines are ei
>> I'm pretty sure that no ppc64 machine needs alias resolution in
>> the kernel,
>> although some are VIPT. Last time we discussed this, Segher
>> explained it
>> to me, but I don't remember which way Cell does it. IIRC, it
>> automatically
>> flushes cache lines that are accessed through al
On Fri, 13 Jul 2007, Geert Uytterhoeven wrote:
> Ah, that explains it. flush_dcache_page() is used in some drivers.
> I'll update my patches. Thanks for the comments!
Does this look OK?
- Replaced KM_USER0 by KM_IRQ0 (all routines are either called from an
interrupt handler, from .request_fn
On Fri, 2007-07-13 at 16:19 +0200, Arnd Bergmann wrote:
> I'm pretty sure that no ppc64 machine needs alias resolution in the kernel,
> although some are VIPT. Last time we discussed this, Segher explained it
> to me, but I don't remember which way Cell does it. IIRC, it automatically
> flushes cac
On Fri, 2007-07-13 at 09:02 -0400, James Bottomley wrote:
> On Wed, 2007-07-04 at 15:22 +0200, Geert Uytterhoeven wrote:
> > + kaddr = kmap_atomic(sgpnt->page, KM_USER0);
> > + if (!kaddr)
> > + return -1;
> > +
On Fri, 13 Jul 2007, James Bottomley wrote:
> On Fri, 2007-07-13 at 17:10 +0200, Geert Uytterhoeven wrote:
> > On Fri, 13 Jul 2007, Arnd Bergmann wrote:
> > > On Friday 13 July 2007, James Bottomley wrote:
> > > > > IC.
> > > > >
> > > > > - flush_kernel_dcache_page() is a no-op on ppc64
> > > >
On Fri, Jul 13 2007, Geert Uytterhoeven wrote:
> > It's probably a good idea to have the flush_kernel_dcache_page() in there
> > anyway, if only to serve as an example for people that copy it into
> > architecture-independent drivers, same as what we do for the
> > k{,un}map_atomic() that is also n
On Fri, 2007-07-13 at 17:10 +0200, Geert Uytterhoeven wrote:
> On Fri, 13 Jul 2007, Arnd Bergmann wrote:
> > On Friday 13 July 2007, James Bottomley wrote:
> > > > IC.
> > > >
> > > > - flush_kernel_dcache_page() is a no-op on ppc64
> > > > (ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE is defined on paris
On Fri, 13 Jul 2007, Arnd Bergmann wrote:
> On Friday 13 July 2007, James Bottomley wrote:
> > > IC.
> > >
> > > � - flush_kernel_dcache_page() is a no-op on ppc64
> > > � � (ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE is defined on parisc only).
> > >
> > > � - For reference, drivers/scsi/ipr.c (another p
On Fri, Jul 13 2007, Geert Uytterhoeven wrote:
> On Fri, 13 Jul 2007, Jens Axboe wrote:
> > On Fri, Jul 13 2007, James Bottomley wrote:
> > > On Wed, 2007-07-04 at 15:22 +0200, Geert Uytterhoeven wrote:
> > > > + kaddr = kmap_atomic(sgpnt->page, KM_USER0);
> > > > +
On Friday 13 July 2007, James Bottomley wrote:
>
> > IC.
> >
> > - flush_kernel_dcache_page() is a no-op on ppc64
> > (ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE is defined on parisc only).
> >
> > - For reference, drivers/scsi/ipr.c (another ppc64 driver) just uses a
> > plain
> > kmap/memc
On Fri, 2007-07-13 at 15:45 +0200, Geert Uytterhoeven wrote:
> On Fri, 13 Jul 2007, James Bottomley wrote:
> > On Fri, 2007-07-13 at 15:25 +0200, Geert Uytterhoeven wrote:
> > > kmap() just returns page_address() on ppc64, as there's no highmem.
> > > kunmap() is a no-op.
> >
> > > So technically
On Fri, 13 Jul 2007, James Bottomley wrote:
> On Fri, 2007-07-13 at 15:25 +0200, Geert Uytterhoeven wrote:
> > kmap() just returns page_address() on ppc64, as there's no highmem.
> > kunmap() is a no-op.
>
> > So technically I could just use page_address() directly, but Christoph
> > wanted
> > me
On Fri, 2007-07-13 at 15:25 +0200, Geert Uytterhoeven wrote:
> kmap() just returns page_address() on ppc64, as there's no highmem.
> kunmap() is a no-op.
> So technically I could just use page_address() directly, but Christoph
> wanted
> me to keep the kmap()/kunmap() sequence because it's conside
On Fri, 13 Jul 2007, Jens Axboe wrote:
> On Fri, Jul 13 2007, James Bottomley wrote:
> > On Wed, 2007-07-04 at 15:22 +0200, Geert Uytterhoeven wrote:
> > > + kaddr = kmap_atomic(sgpnt->page, KM_USER0);
> > > + if (!kaddr)
> > > +
On Fri, Jul 13 2007, James Bottomley wrote:
> On Wed, 2007-07-04 at 15:22 +0200, Geert Uytterhoeven wrote:
> > + kaddr = kmap_atomic(sgpnt->page, KM_USER0);
> > + if (!kaddr)
> > + return -1;
> > + len =
On Wed, 2007-07-04 at 15:22 +0200, Geert Uytterhoeven wrote:
> + kaddr = kmap_atomic(sgpnt->page, KM_USER0);
> + if (!kaddr)
> + return -1;
> + len = sgpnt->length;
> + if ((req_len
From: Geert Uytterhoeven <[EMAIL PROTECTED]>
Add a BD/DVD/CD-ROM Storage Driver for the PS3:
- Implemented as a SCSI device driver
- Uses software scatter-gather with a 64 KiB bounce buffer as the hypervisor
doesn't support scatter-gather
CC: Geoff Levand <[EMAIL PROTECTED]>
Signed-off-by
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