Am 06.08.2015 um 11:19 schrieb Boris Brezillon:
>> I think this needs more discussion.
>>
>> Boris, Brian, will you be at Embedded Linux Conference Europe in Dublin?
>> Maybe we can discuss these issues (data retention, ff-checks, etc...) in
>> person and figure out where to address them.
>> I
Hi Richard,
On Tue, 4 Aug 2015 09:21:27 +0200
Richard Weinberger wrote:
> Andrea,
>
> Am 04.08.2015 um 09:02 schrieb Andrea Scian:
> >> I'm not sure whether introducing a read-before-write check is the best
> >> solution.
> >> At least we need hard numbers for slow/old SLC NANDs too.
> >
> >
Am 06.08.2015 um 11:19 schrieb Boris Brezillon:
I think this needs more discussion.
Boris, Brian, will you be at Embedded Linux Conference Europe in Dublin?
Maybe we can discuss these issues (data retention, ff-checks, etc...) in
person and figure out where to address them.
I really want
Hi Richard,
On Tue, 4 Aug 2015 09:21:27 +0200
Richard Weinberger rich...@nod.at wrote:
Andrea,
Am 04.08.2015 um 09:02 schrieb Andrea Scian:
I'm not sure whether introducing a read-before-write check is the best
solution.
At least we need hard numbers for slow/old SLC NANDs too.
Il 04/08/2015 09:21, Richard Weinberger ha scritto:
Andrea,
Am 04.08.2015 um 09:02 schrieb Andrea Scian:
I'm not sure whether introducing a read-before-write check is the best solution.
At least we need hard numbers for slow/old SLC NANDs too.
We can enable the feature only for MLC, AFAIK it
Il 04/08/2015 09:21, Richard Weinberger ha scritto:
Andrea,
Am 04.08.2015 um 09:02 schrieb Andrea Scian:
I'm not sure whether introducing a read-before-write check is the best solution.
At least we need hard numbers for slow/old SLC NANDs too.
We can enable the feature only for MLC, AFAIK it
Andrea,
Am 04.08.2015 um 09:02 schrieb Andrea Scian:
>> I'm not sure whether introducing a read-before-write check is the best
>> solution.
>> At least we need hard numbers for slow/old SLC NANDs too.
>
> We can enable the feature only for MLC, AFAIK it has not been required for
> old SLC ;-)
Richard,
Il 03/08/2015 21:32, Richard Weinberger ha scritto:
Am 03.08.2015 um 15:39 schrieb Andrea Scian:
I think I can find some time to do some performance tests on real hardware.
Can you please help me in finding:
- which benchmark to use (currently I'm using bonnie++ on UBIFS, maybe I
can
Andrea,
Am 04.08.2015 um 09:02 schrieb Andrea Scian:
I'm not sure whether introducing a read-before-write check is the best
solution.
At least we need hard numbers for slow/old SLC NANDs too.
We can enable the feature only for MLC, AFAIK it has not been required for
old SLC ;-)
I think
Richard,
Il 03/08/2015 21:32, Richard Weinberger ha scritto:
Am 03.08.2015 um 15:39 schrieb Andrea Scian:
I think I can find some time to do some performance tests on real hardware.
Can you please help me in finding:
- which benchmark to use (currently I'm using bonnie++ on UBIFS, maybe I
can
Am 03.08.2015 um 15:39 schrieb Andrea Scian:
>>> I think I can find some time to do some performance tests on real hardware.
>>> Can you please help me in finding:
>>> - which benchmark to use (currently I'm using bonnie++ on UBIFS, maybe I
>>> can you just mtd_speedtest)
>>> - where to implement
Il 03/08/2015 14:42, Boris Brezillon ha scritto:
Adding Artem and Richard in the loop.
thanks ;-)
On Mon, 3 Aug 2015 13:16:02 +0200
Andrea Scian wrote:
Dear Boris,
Il 31/07/2015 18:27, Boris Brezillon ha scritto:
On Fri, 31 Jul 2015 18:19:30 +0200
Andrea Scian wrote:
Il 31/07/2015
Adding Artem and Richard in the loop.
On Mon, 3 Aug 2015 13:16:02 +0200
Andrea Scian wrote:
>
> Dear Boris,
>
> Il 31/07/2015 18:27, Boris Brezillon ha scritto:
> > On Fri, 31 Jul 2015 18:19:30 +0200
> > Andrea Scian wrote:
> >
> >> Il 31/07/2015 16:10, Boris Brezillon ha scritto:
> >>> On
Dear Boris,
Il 31/07/2015 18:27, Boris Brezillon ha scritto:
On Fri, 31 Jul 2015 18:19:30 +0200
Andrea Scian wrote:
Il 31/07/2015 16:10, Boris Brezillon ha scritto:
On Fri, 31 Jul 2015 15:40:13 +0200
Andrea Scian wrote:
Boris,
Il 31/07/2015 12:32, Boris Brezillon ha scritto:
Hi
Dear Boris,
Il 31/07/2015 18:27, Boris Brezillon ha scritto:
On Fri, 31 Jul 2015 18:19:30 +0200
Andrea Scian r...@dave-tech.it wrote:
Il 31/07/2015 16:10, Boris Brezillon ha scritto:
On Fri, 31 Jul 2015 15:40:13 +0200
Andrea Scian r...@dave-tech.it wrote:
Boris,
Il 31/07/2015 12:32,
Adding Artem and Richard in the loop.
On Mon, 3 Aug 2015 13:16:02 +0200
Andrea Scian r...@dave-tech.it wrote:
Dear Boris,
Il 31/07/2015 18:27, Boris Brezillon ha scritto:
On Fri, 31 Jul 2015 18:19:30 +0200
Andrea Scian r...@dave-tech.it wrote:
Il 31/07/2015 16:10, Boris Brezillon
Il 03/08/2015 14:42, Boris Brezillon ha scritto:
Adding Artem and Richard in the loop.
thanks ;-)
On Mon, 3 Aug 2015 13:16:02 +0200
Andrea Scian r...@dave-tech.it wrote:
Dear Boris,
Il 31/07/2015 18:27, Boris Brezillon ha scritto:
On Fri, 31 Jul 2015 18:19:30 +0200
Andrea Scian
Am 03.08.2015 um 15:39 schrieb Andrea Scian:
I think I can find some time to do some performance tests on real hardware.
Can you please help me in finding:
- which benchmark to use (currently I'm using bonnie++ on UBIFS, maybe I
can you just mtd_speedtest)
- where to implement those read
I
On Fri, 31 Jul 2015 18:19:30 +0200
Andrea Scian wrote:
> Il 31/07/2015 16:10, Boris Brezillon ha scritto:
> > On Fri, 31 Jul 2015 15:40:13 +0200
> > Andrea Scian wrote:
> >
> >>
> >> Boris,
> >>
> >> Il 31/07/2015 12:32, Boris Brezillon ha scritto:
> >>> Hi Andrea,
> >>>
> >>> Adding Han in Cc.
Il 31/07/2015 16:10, Boris Brezillon ha scritto:
On Fri, 31 Jul 2015 15:40:13 +0200
Andrea Scian wrote:
Boris,
Il 31/07/2015 12:32, Boris Brezillon ha scritto:
Hi Andrea,
Adding Han in Cc.
On Fri, 31 Jul 2015 12:07:21 +0200
Andrea Scian wrote:
Dear Boris,
Il 30/07/2015 19:34, Boris
On Fri, 31 Jul 2015 15:40:13 +0200
Andrea Scian wrote:
>
> Boris,
>
> Il 31/07/2015 12:32, Boris Brezillon ha scritto:
> > Hi Andrea,
> >
> > Adding Han in Cc.
> >
> > On Fri, 31 Jul 2015 12:07:21 +0200
> > Andrea Scian wrote:
> >
> >>
> >> Dear Boris,
> >>
> >>
> >> Il 30/07/2015 19:34,
Boris,
Il 31/07/2015 12:32, Boris Brezillon ha scritto:
Hi Andrea,
Adding Han in Cc.
On Fri, 31 Jul 2015 12:07:21 +0200
Andrea Scian wrote:
Dear Boris,
Il 30/07/2015 19:34, Boris Brezillon ha scritto:
The default NAND read functions are relying on an underlying controller
to correct
Hi Andrea,
Adding Han in Cc.
On Fri, 31 Jul 2015 12:07:21 +0200
Andrea Scian wrote:
>
> Dear Boris,
>
>
> Il 30/07/2015 19:34, Boris Brezillon ha scritto:
> > The default NAND read functions are relying on an underlying controller
> > to correct bitflips, but some of those controller cannot
Dear Boris,
Il 30/07/2015 19:34, Boris Brezillon ha scritto:
The default NAND read functions are relying on an underlying controller
to correct bitflips, but some of those controller cannot properly fix
bitflips in erased pages.
In case of ECC failures, check if the page of subpage is empty
On Fri, 31 Jul 2015 15:40:13 +0200
Andrea Scian r...@dave-tech.it wrote:
Boris,
Il 31/07/2015 12:32, Boris Brezillon ha scritto:
Hi Andrea,
Adding Han in Cc.
On Fri, 31 Jul 2015 12:07:21 +0200
Andrea Scian r...@dave-tech.it wrote:
Dear Boris,
Il 30/07/2015 19:34,
Boris,
Il 31/07/2015 12:32, Boris Brezillon ha scritto:
Hi Andrea,
Adding Han in Cc.
On Fri, 31 Jul 2015 12:07:21 +0200
Andrea Scian r...@dave-tech.it wrote:
Dear Boris,
Il 30/07/2015 19:34, Boris Brezillon ha scritto:
The default NAND read functions are relying on an underlying
Il 31/07/2015 16:10, Boris Brezillon ha scritto:
On Fri, 31 Jul 2015 15:40:13 +0200
Andrea Scian r...@dave-tech.it wrote:
Boris,
Il 31/07/2015 12:32, Boris Brezillon ha scritto:
Hi Andrea,
Adding Han in Cc.
On Fri, 31 Jul 2015 12:07:21 +0200
Andrea Scian r...@dave-tech.it wrote:
Dear
On Fri, 31 Jul 2015 18:19:30 +0200
Andrea Scian r...@dave-tech.it wrote:
Il 31/07/2015 16:10, Boris Brezillon ha scritto:
On Fri, 31 Jul 2015 15:40:13 +0200
Andrea Scian r...@dave-tech.it wrote:
Boris,
Il 31/07/2015 12:32, Boris Brezillon ha scritto:
Hi Andrea,
Adding Han in
Dear Boris,
Il 30/07/2015 19:34, Boris Brezillon ha scritto:
The default NAND read functions are relying on an underlying controller
to correct bitflips, but some of those controller cannot properly fix
bitflips in erased pages.
In case of ECC failures, check if the page of subpage is empty
Hi Andrea,
Adding Han in Cc.
On Fri, 31 Jul 2015 12:07:21 +0200
Andrea Scian r...@dave-tech.it wrote:
Dear Boris,
Il 30/07/2015 19:34, Boris Brezillon ha scritto:
The default NAND read functions are relying on an underlying controller
to correct bitflips, but some of those
The default NAND read functions are relying on an underlying controller
to correct bitflips, but some of those controller cannot properly fix
bitflips in erased pages.
In case of ECC failures, check if the page of subpage is empty before
reporting an ECC failure.
Signed-off-by: Boris Brezillon
The default NAND read functions are relying on an underlying controller
to correct bitflips, but some of those controller cannot properly fix
bitflips in erased pages.
In case of ECC failures, check if the page of subpage is empty before
reporting an ECC failure.
Signed-off-by: Boris Brezillon
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