From: Artem Bityutskiy <dedekind1@gmail.com>
To: Richard Weinberger <richard@nod.at>
Cc: nyoushchenko@mvista.com, artem.bityutskiy@linux.intel.com,
linux-kernel@vger.kernel.org, adrian.hunter@intel.com,
Heinz.Egger@linutronix.de, thomas.wucher@linutronix.de,
linux-mtd@lists.infradead.org, shmulik.ladkani@gmail.com,
tglx@linutronix.de, Marius.Mazarel@ugal.ro, tim.bird@am.sony.com
Subject: Re: UBI fastmap updates
Date: Sat, 30 Jun 2012 13:43:18 +0300 [thread overview]
Message-ID: <1341052998.2115.3.camel@koala> (raw)
In-Reply-To: <1340982869-77042-1-git-send-email-richard@nod.at>
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On Fri, 2012-06-29 at 17:14 +0200, Richard Weinberger wrote:
> This is the next round of UBI fastmap updates.
>
> Fastmap is now disabled by default.
> If you attach an image it will not automatically convert it
> to the fastmap format.
> UBI has a new module parameter "fm_auto".
> If set to 1 UBI will create a fastmap automatically on your
> flash device.
> Please see commit "Add a module parameter to enable fastmap"
> for more details.
One thing I've noticed is that you use vmalloc for some of the buffers
you do I/O on (fm_raw). This is a problem for many ARM platforms because
they cannot do DMA on such buffers. The drivers have to implement
various workarouns for this: either fall back to memcopies or do an
extra copy to a DMA-able buffers.
UBI and UBIFS already to I/O on vmalloc'ed buffers, an I am planning to
fix this, which is not easy. Would be great to not add more of these.
--
Best Regards,
Artem Bityutskiy
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WARNING: multiple messages have this Message-ID (diff)
From: Artem Bityutskiy <dedekind1@gmail.com>
To: Richard Weinberger <richard@nod.at>
Cc: linux-mtd@lists.infradead.org, nyoushchenko@mvista.com,
artem.bityutskiy@linux.intel.com, linux-kernel@vger.kernel.org,
adrian.hunter@intel.com, Heinz.Egger@linutronix.de,
thomas.wucher@linutronix.de, shmulik.ladkani@gmail.com,
tglx@linutronix.de, Marius.Mazarel@ugal.ro, tim.bird@am.sony.com
Subject: Re: UBI fastmap updates
Date: Sat, 30 Jun 2012 13:43:18 +0300 [thread overview]
Message-ID: <1341052998.2115.3.camel@koala> (raw)
In-Reply-To: <1340982869-77042-1-git-send-email-richard@nod.at>
[-- Attachment #1: Type: text/plain, Size: 959 bytes --]
On Fri, 2012-06-29 at 17:14 +0200, Richard Weinberger wrote:
> This is the next round of UBI fastmap updates.
>
> Fastmap is now disabled by default.
> If you attach an image it will not automatically convert it
> to the fastmap format.
> UBI has a new module parameter "fm_auto".
> If set to 1 UBI will create a fastmap automatically on your
> flash device.
> Please see commit "Add a module parameter to enable fastmap"
> for more details.
One thing I've noticed is that you use vmalloc for some of the buffers
you do I/O on (fm_raw). This is a problem for many ARM platforms because
they cannot do DMA on such buffers. The drivers have to implement
various workarouns for this: either fall back to memcopies or do an
extra copy to a DMA-able buffers.
UBI and UBIFS already to I/O on vmalloc'ed buffers, an I am planning to
fix this, which is not easy. Would be great to not add more of these.
--
Best Regards,
Artem Bityutskiy
[-- Attachment #2: This is a digitally signed message part --]
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next prev parent reply other threads:[~2012-06-30 10:43 UTC|newest]
Thread overview: 134+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-29 15:14 UBI fastmap updates Richard Weinberger
2012-06-29 15:14 ` Richard Weinberger
2012-06-29 15:14 ` [PATCH 01/11] UBI: Fastmap: Fix mem leak in error path Richard Weinberger
2012-06-29 15:14 ` Richard Weinberger
2012-06-29 15:14 ` [PATCH 02/11] UBI: Fastmap: Amend self_check_eba() Richard Weinberger
2012-06-29 15:14 ` Richard Weinberger
2012-06-29 15:14 ` [PATCH 03/11] UBI: Fastmap: Remove forward declaration Richard Weinberger
2012-06-29 15:14 ` Richard Weinberger
2012-06-29 15:14 ` [PATCH 04/11] UBI: Fastmap: Move fastmap specific code into ubi_scan_fastmap() Richard Weinberger
2012-06-29 15:14 ` Richard Weinberger
2012-06-29 15:14 ` [PATCH 05/11] UBI: Fastmap: Kill TODO Richard Weinberger
2012-06-29 15:14 ` Richard Weinberger
2012-06-29 15:14 ` [PATCH 06/11] UBI: Fastmap: Remove unused variable Richard Weinberger
2012-06-29 15:14 ` Richard Weinberger
2012-06-29 15:14 ` [PATCH 07/11] UBI: Fastmap: Fix scan regression Richard Weinberger
2012-06-29 15:14 ` Richard Weinberger
2012-06-29 15:14 ` [PATCH 08/11] ubi: fastmap: Remove 'ubi' parameter of 'destroy_ai()' Richard Weinberger
2012-06-29 15:14 ` Richard Weinberger
2012-06-29 15:14 ` [PATCH 09/11] ubi: fastmap: Do not free 'ai' in 'scan_all()' Richard Weinberger
2012-06-29 15:14 ` Richard Weinberger
2012-06-29 15:14 ` [PATCH 10/11] UBI: Fastmap: Disable fastmap per default Richard Weinberger
2012-06-29 15:14 ` Richard Weinberger
2012-06-29 15:14 ` [PATCH 11/11] UBI: Fastmap: Add a module parameter to enable fastmap Richard Weinberger
2012-06-29 15:14 ` Richard Weinberger
2012-07-01 6:28 ` Rusty Russell
2012-07-01 6:28 ` Rusty Russell
2012-07-01 9:41 ` Richard Weinberger
2012-07-01 9:41 ` Richard Weinberger
2012-06-30 10:43 ` Artem Bityutskiy [this message]
2012-06-30 10:43 ` UBI fastmap updates Artem Bityutskiy
2012-06-30 10:53 ` Richard Weinberger
2012-06-30 10:53 ` Richard Weinberger
2012-06-30 11:24 ` Artem Bityutskiy
2012-06-30 11:24 ` Artem Bityutskiy
2012-06-30 14:24 ` Artem Bityutskiy
2012-06-30 14:24 ` Artem Bityutskiy
2012-07-08 11:47 ` Shmulik Ladkani
2012-07-08 11:47 ` Shmulik Ladkani
2012-07-08 12:07 ` Richard Weinberger
2012-07-08 12:07 ` Richard Weinberger
2012-07-08 15:11 ` Richard Weinberger
2012-07-08 15:11 ` Richard Weinberger
2012-07-09 7:37 ` Shmulik Ladkani
2012-07-09 7:37 ` Shmulik Ladkani
2012-07-09 8:19 ` Richard Weinberger
2012-07-09 8:19 ` Richard Weinberger
-- strict thread matches above, loose matches on Subject: below --
2013-09-28 13:55 Richard Weinberger
2013-10-03 16:44 ` Artem Bityutskiy
2012-07-09 12:18 Richard Weinberger
2012-07-09 12:18 ` Richard Weinberger
2012-08-02 14:12 ` Artem Bityutskiy
2012-08-02 14:12 ` Artem Bityutskiy
2012-08-02 14:15 ` Richard Weinberger
2012-08-02 14:15 ` Richard Weinberger
2012-08-02 14:29 ` Artem Bityutskiy
2012-08-02 14:29 ` Artem Bityutskiy
2012-08-02 14:51 ` Richard Weinberger
2012-08-02 14:51 ` Richard Weinberger
2012-08-02 16:17 ` Artem Bityutskiy
2012-08-02 16:17 ` Artem Bityutskiy
2012-08-02 16:32 ` Richard Weinberger
2012-08-02 16:32 ` Richard Weinberger
2012-08-02 16:45 ` Artem Bityutskiy
2012-08-02 16:45 ` Artem Bityutskiy
2012-08-02 16:54 ` Richard Weinberger
2012-08-02 16:54 ` Richard Weinberger
2012-08-02 17:03 ` Tim Bird
2012-08-02 17:03 ` Tim Bird
2012-08-02 17:06 ` Richard Weinberger
2012-08-02 17:06 ` Richard Weinberger
2012-08-02 17:40 ` Artem Bityutskiy
2012-08-02 17:40 ` Artem Bityutskiy
2012-08-02 17:45 ` Richard Weinberger
2012-08-02 17:45 ` Richard Weinberger
2012-08-02 17:59 ` Artem Bityutskiy
2012-08-02 17:59 ` Artem Bityutskiy
2012-08-02 18:03 ` Richard Weinberger
2012-08-02 18:03 ` Richard Weinberger
2012-08-02 18:15 ` Artem Bityutskiy
2012-08-02 18:15 ` Artem Bityutskiy
2012-08-05 8:23 ` Shmulik Ladkani
2012-08-05 8:23 ` Shmulik Ladkani
2012-08-05 14:25 ` Richard Weinberger
2012-08-05 14:25 ` Richard Weinberger
2012-08-02 17:50 ` Artem Bityutskiy
2012-08-02 17:50 ` Artem Bityutskiy
2012-08-02 14:58 ` Artem Bityutskiy
2012-08-02 14:58 ` Artem Bityutskiy
2012-08-02 14:59 ` Richard Weinberger
2012-08-02 14:59 ` Richard Weinberger
2012-08-02 15:18 ` Artem Bityutskiy
2012-08-02 15:18 ` Artem Bityutskiy
2012-08-02 15:19 ` Richard Weinberger
2012-08-02 15:19 ` Richard Weinberger
2012-08-06 17:36 ` Richard Weinberger
2012-08-06 17:36 ` Richard Weinberger
2012-08-07 4:21 ` Artem Bityutskiy
2012-08-07 4:21 ` Artem Bityutskiy
2012-08-07 7:29 ` Richard Weinberger
2012-08-07 7:29 ` Richard Weinberger
2012-08-07 18:53 ` Artem Bityutskiy
2012-08-07 18:53 ` Artem Bityutskiy
2012-08-02 18:50 ` Artem Bityutskiy
2012-08-02 18:50 ` Artem Bityutskiy
2012-08-02 18:56 ` Artem Bityutskiy
2012-08-02 18:56 ` Artem Bityutskiy
2012-08-03 8:47 ` Artem Bityutskiy
2012-08-03 8:47 ` Artem Bityutskiy
2012-08-03 8:56 ` Richard Weinberger
2012-08-03 8:56 ` Richard Weinberger
2012-08-17 13:11 ` Artem Bityutskiy
2012-08-17 13:11 ` Artem Bityutskiy
2012-08-17 13:33 ` Richard Weinberger
2012-08-17 13:33 ` Richard Weinberger
2012-08-17 13:41 ` Artem Bityutskiy
2012-08-17 13:41 ` Artem Bityutskiy
2012-08-17 13:43 ` Richard Weinberger
2012-08-17 13:43 ` Richard Weinberger
2012-08-17 14:06 ` Artem Bityutskiy
2012-08-17 14:06 ` Artem Bityutskiy
2012-07-02 16:23 Richard Weinberger
2012-07-02 16:23 ` Richard Weinberger
2012-06-27 15:57 Richard Weinberger
2012-06-27 15:57 ` Richard Weinberger
2012-06-23 13:03 Richard Weinberger
2012-06-23 13:03 ` Richard Weinberger
2012-06-27 4:20 ` Namjae Jeon
2012-06-27 4:20 ` Namjae Jeon
2012-06-27 6:48 ` Nikita V. Youshchenko
2012-06-27 6:48 ` Nikita V. Youshchenko
2012-06-27 7:17 ` Richard Weinberger
2012-06-27 7:17 ` Richard Weinberger
2012-06-18 16:18 UBI Fastmap updates Richard Weinberger
2012-06-18 16:18 ` Richard Weinberger
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