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From: Richard Weinberger <richard@nod.at>
To: linux-mtd@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, Richard Weinberger <richard@nod.at>
Subject: [PATCH 14/14] ubi: Remove experimental stigma from Fastmap
Date: Wed, 13 Jun 2018 23:23:44 +0200 [thread overview]
Message-ID: <20180613212344.11608-15-richard@nod.at> (raw)
In-Reply-To: <20180613212344.11608-1-richard@nod.at>
I've hold up this a way too long. Over the last two years Fastmap gained
many users which made it possible to sort out the last issues.
Signed-off-by: Richard Weinberger <richard@nod.at>
---
drivers/mtd/ubi/Kconfig | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/drivers/mtd/ubi/Kconfig b/drivers/mtd/ubi/Kconfig
index 43d131f5ae10..4de5e4e8d4ab 100644
--- a/drivers/mtd/ubi/Kconfig
+++ b/drivers/mtd/ubi/Kconfig
@@ -57,12 +57,9 @@ config MTD_UBI_BEB_LIMIT
Leave the default value if unsure.
config MTD_UBI_FASTMAP
- bool "UBI Fastmap (Experimental feature)"
+ bool "UBI Fastmap"
default n
help
- Important: this feature is experimental so far and the on-flash
- format for fastmap may change in the next kernel versions
-
Fastmap is a mechanism which allows attaching an UBI device
in nearly constant time. Instead of scanning the whole MTD device it
only has to locate a checkpoint (called fastmap) on the device.
@@ -74,6 +71,8 @@ config MTD_UBI_FASTMAP
images are still usable with UBI implementations without
fastmap support. On typical flash devices the whole fastmap fits
into one PEB. UBI will reserve PEBs to hold two fastmaps.
+ While Fastmap is considered correct it weakens UBI wrt. robustness,
+ a full scan of the MTD allows UBI to react better to bad flashes.
If in doubt, say "N".
--
2.13.6
prev parent reply other threads:[~2018-06-13 21:25 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-13 21:23 [PATCH 00/14] ubi: Fastmap updates Richard Weinberger
2018-06-13 21:23 ` [PATCH 01/14] ubi: fastmap: Read PEB numbers more carefully Richard Weinberger
2018-06-14 1:04 ` kbuild test robot
2018-06-14 6:23 ` Richard Weinberger
2018-06-20 10:17 ` Boris Brezillon
2018-06-13 21:23 ` [PATCH 02/14] ubi: Fix assert in ubi_wl_init Richard Weinberger
2018-06-20 10:11 ` Boris Brezillon
2018-06-13 21:23 ` [PATCH 03/14] ubi: fastmap: Add support for flags Richard Weinberger
2018-06-24 12:49 ` Boris Brezillon
2018-06-13 21:23 ` [PATCH 04/14] ubi: fastmap: Add UBI_FM_SB_PRESEEDED_FLG flag Richard Weinberger
2018-06-24 12:53 ` Boris Brezillon
2018-06-13 21:23 ` [PATCH 05/14] ubi: fastmap: Implement PEB translation Richard Weinberger
2018-06-13 21:23 ` [PATCH 06/14] ubi: fastmap: Handle bad block count for preseeded fastmap case Richard Weinberger
2018-06-13 21:23 ` [PATCH 07/14] ubi: fastmap: Fixup pool sizes for preseeded fastmaps Richard Weinberger
2018-06-13 21:23 ` [PATCH 08/14] ubi: fastmap: Scan empty space if fastmap is preseeded Richard Weinberger
2018-06-13 21:23 ` [PATCH 09/14] ubi: fastmap: Relax size check Richard Weinberger
2018-06-24 12:55 ` Boris Brezillon
2018-06-13 21:23 ` [PATCH 10/14] ubi: fastmap: Change a WARN_ON() to ubi_err() Richard Weinberger
2018-06-24 13:04 ` Boris Brezillon
2018-06-13 21:23 ` [PATCH 11/14] ubi: Add module parameter to force a full scan Richard Weinberger
2018-06-24 13:09 ` Boris Brezillon
2018-06-13 21:23 ` [PATCH 12/14] ubi: uapi: Add mode selector to attach request Richard Weinberger
2018-06-24 13:12 ` Boris Brezillon
2018-06-13 21:23 ` [PATCH 13/14] ubi: Wire up attach mode selector Richard Weinberger
2018-06-13 21:23 ` Richard Weinberger [this message]
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