On Sun, 29 Nov 2015, Geert Uytterhoeven wrote:
> If an ISA access takes 8 us, while the CPU runs at 1 GHz, i.e. 500M
> loops/s, the difference will be huge.
Ondrej showed that an ISA access can take about 1.6 us. I don't know what
to make of the "8 uS" comment in the mainline driver. Maybe it
Hi Finn,
On Sun, Nov 29, 2015 at 11:25 AM, Finn Thain wrote:
> On Sun, 29 Nov 2015, Geert Uytterhoeven wrote:
>> This still heavily depends on the processing time spent in
>> NCR5380_read(). You should never use a value derived from
>> loops_per_jiffy for a non-empty loop,
>
> Sure but the time-o
On Sun, 29 Nov 2015, Geert Uytterhoeven wrote:
> This still heavily depends on the processing time spent in
> NCR5380_read(). You should never use a value derived from
> loops_per_jiffy for a non-empty loop,
Sure but the time-out condition isn't supposed to be precise.
Plus/minus a jiffy is no
Hi Finn,
On Thu, Nov 26, 2015 at 11:32 PM, Finn Thain wrote:
>> The timekeeping warning does not appear when all 71 patches are applied.
>> Reverse-bisected it - the warning disappears after:
>> [PATCH 50/71] ncr5380: Change instance->host_lock to hostdata->lock
>>
>
> Makes sense. I think that t
On Sunday 29 November 2015 01:46:03 Finn Thain wrote:
>
> On Sun, 29 Nov 2015, Ondrej Zary wrote:
>
> > > [...] I think that this should solve the problem:
> >
> > Yes, it does!
> >
> > [ 48.119367] scsi host2: Generic NCR5380/NCR53C400 SCSI, io_port 0x0,
> > n_io_port 0, base 0xd8000, irq 0
On Sun, 29 Nov 2015, Ondrej Zary wrote:
> > [...] I think that this should solve the problem:
>
> Yes, it does!
>
> [ 48.119367] scsi host2: Generic NCR5380/NCR53C400 SCSI, io_port 0x0,
> n_io_port 0, base 0xd8000, irq 0, can_queue 16, cmd_per_lun 2, sg_tablesize
> 128, this_id 7, flags { N
On Thursday 26 November 2015 23:32:46 Finn Thain wrote:
>
> On Thu, 26 Nov 2015, Ondrej Zary wrote:
>
> >
> > [ 156.014234] scsi host2: Generic NCR5380/NCR53C400 SCSI, io_port 0x0,
> > n_io_port 0, base 0xd8000, irq 0, can_queue 16, cmd_per_lun 2, sg_tablesize
> > 128, this_id 7, flags { NO_D
On Thu, 26 Nov 2015, Ondrej Zary wrote:
>
> [ 156.014234] scsi host2: Generic NCR5380/NCR53C400 SCSI, io_port 0x0,
> n_io_port 0, base 0xd8000, irq 0, can_queue 16, cmd_per_lun 2, sg_tablesize
> 128, this_id 7, flags { NO_DMA_FIXUP }, options { AUTOPROBE_IRQ PSEUDO_DMA }
> [ 156.020369] scsi
On Thursday 26 November 2015 11:23:01 Finn Thain wrote:
>
> On Wed, 25 Nov 2015, Ondrej Zary wrote:
>
> > On Wednesday 25 November 2015 04:17:09 Finn Thain wrote:
> > >
> > > On Tue, 24 Nov 2015, Ondrej Zary wrote:
> > >
> > > >
> > > > Bisecting slow module initialization pointed to this comm
On Wed, 25 Nov 2015, Ondrej Zary wrote:
> On Wednesday 25 November 2015 04:17:09 Finn Thain wrote:
> >
> > On Tue, 24 Nov 2015, Ondrej Zary wrote:
> >
> > >
> > > Bisecting slow module initialization pointed to this commit.
> > >
> > > Before this commit (2 seconds):
> > > [ 60.317374] scsi
On Wednesday 25 November 2015 04:17:09 Finn Thain wrote:
>
> On Tue, 24 Nov 2015, Ondrej Zary wrote:
>
> > On Wednesday 18 November 2015 09:35:17 Finn Thain wrote:
> > > Linux v2.1.105 changed the algorithm for polling for the BSY signal
> > > in NCR5380_select() and NCR5380_main().
> > >
> > >
On Tue, 24 Nov 2015, Ondrej Zary wrote:
> On Wednesday 18 November 2015 09:35:17 Finn Thain wrote:
> > Linux v2.1.105 changed the algorithm for polling for the BSY signal
> > in NCR5380_select() and NCR5380_main().
> >
> > Presently, this code has a bug. Back then, NCR5380_set_timer(hostdata, 1)
On Wednesday 18 November 2015 09:35:17 Finn Thain wrote:
> Linux v2.1.105 changed the algorithm for polling for the BSY signal
> in NCR5380_select() and NCR5380_main().
>
> Presently, this code has a bug. Back then, NCR5380_set_timer(hostdata, 1)
> meant reschedule main() after sleeping for 10 ms.
Linux v2.1.105 changed the algorithm for polling for the BSY signal
in NCR5380_select() and NCR5380_main().
Presently, this code has a bug. Back then, NCR5380_set_timer(hostdata, 1)
meant reschedule main() after sleeping for 10 ms. Repeated 25 times this
provided the recommended 250 ms selection t
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