Denys Vlasenko wrote:
> Hi Matthew, Hannes,
>
> Any news on this? Where these patches stand now?
> Are they accepted into linux-scsi?
>
> On Wednesday 14 November 2007 13:39, Denys Vlasenko wrote:
>> hi Matthew,
>>
>> On Wednesday 14 November 2007 06:35, Hannes Reinecke wrote:
>>> Matthew Wilcox
Hi James !
(Please CC me on replies as I'm not subscribed to linux-scsi)
I've been debugging various issues on the PowerPC 44x embedded
architecture which happens to have non-coherent PCI DMA.
One of the problem I'm hitting is that one really need to enforce
kmalloc alignement to cache lines or
If blk_rq_map_sg wrote more than was allocated in the scatterlist,
BUG_ON() is probably the right thing to do.
Signed-off-by: Rusty Russell <[EMAIL PROTECTED]>
Acked-by: Jens Axboe <[EMAIL PROTECTED]>
---
drivers/scsi/scsi_tgt_lib.c | 11 +++
1 files changed, 3 insertions(+), 8 deletion
James Bottomley wrote:
Please don't drop the cc lists. There are others who probably have more
informed opinions than I do who won't get to comment if they don't see
it.
On Sun, 2007-10-28 at 17:36 -0700, Anthony Ewell wrote:
James Bottomley wrote:
On Sat, 2007-10-27 at 13:21 -0700, Anthony E
Fajun Chen wrote:
As a matter of fact, I'm using /dev/sg*. Due to the size of my test
application, I have not be able to compress it into a small and
publishable form. However, this issue can be easily reproduced on my
ARM XScale target using sg3_util code as follows:
1. Run printtime.c attache
On 11/18/07, Mark Lord <[EMAIL PROTECTED]> wrote:
> Fajun Chen wrote:
> >..
> > I verified your program works in my system and my application works as
> > well if changed accordingly. However, this change (indirect IO in sg
> > term) may come at a performance cost for IO intensive applications
> >
Fajun Chen wrote:
..
I verified your program works in my system and my application works as
well if changed accordingly. However, this change (indirect IO in sg
term) may come at a performance cost for IO intensive applications
since it does NOT utilize mmaped buffer managed by sg driver. Please
On 11/18/07, Mark Lord <[EMAIL PROTECTED]> wrote:
> Fajun Chen wrote:
> > On 11/17/07, Mark Lord <[EMAIL PROTECTED]> wrote:
> ..
> >> What you probably intended to do instead, was to use mmap to just allocate
> >> some page-aligned RAM, not to actually mmap'd any on-disk data. Right?
> >>
> >> Her
Fajun Chen wrote:
On 11/17/07, Mark Lord <[EMAIL PROTECTED]> wrote:
..
What you probably intended to do instead, was to use mmap to just allocate
some page-aligned RAM, not to actually mmap'd any on-disk data. Right?
Here's how that's done:
read_buffer = (U8 *)mmap(NULL, buf_sz, PROT_R
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