linux-kernel - [PATCH 14/14] ubi: Remove experimental stigma from Fastmap

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20180613212344.11608-15-richard@nod.at>
Date:   Wed, 13 Jun 2018 23:23:44 +0200
From:   Richard Weinberger <richard@....at>
To:     linux-mtd@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, Richard Weinberger <richard@....at>
Subject: [PATCH 14/14] ubi: Remove experimental stigma from Fastmap

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@....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