From: Tejun Heo <tj@kernel.org>
To: Jens Axboe <jens.axboe@oracle.com>
Cc: Ingo Molnar <mingo@elte.hu>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>, Yinghai Lu <yinghai@kernel.org>
Subject: [PATCH] block: add BIG FAT WARNING to CONFIG_DEBUG_BLOCK_EXT_DEVT
Date: Mon, 13 Oct 2008 15:41:35 +0900 [thread overview]
Message-ID: <48F2ED9F.7020606@kernel.org> (raw)
In-Reply-To: <20081011175818.GY19428@kernel.dk>
CONFIG_DEBUG_BLOCK_EXT_DEVT can break booting even on some modern
distros. Add BIG FAT WARNING to keep people at a safe distance.
Signed-off-by: Tejun Heo <tj@kernel.org>
---
Okay, w/ or w/o Ingo's change, it would be worthwhile to warn
people more clearly so that we can at least say 'told ya'. :-)
lib/Kconfig.debug | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index aa81d28..44e67a1 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -652,6 +652,11 @@ config DEBUG_BLOCK_EXT_DEVT
depends on BLOCK
default n
help
+ BIG FAT WARNING: ENABLING THIS OPTION MIGHT BREAK BOOTING ON
+ SOME DISTRIBUTIONS. DO NOT ENABLE THIS UNLESS YOU KNOW WHAT
+ YOU ARE DOING. Distros, please enable this and fix whatever
+ is broken.
+
Conventionally, block device numbers are allocated from
predetermined contiguous area. However, extended block area
may introduce non-contiguous block device numbers. This
next prev parent reply other threads:[~2008-10-13 6:43 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-10 20:30 [bug] latest -git boot hang Ingo Molnar
2008-10-10 20:40 ` Ingo Molnar
2008-10-10 20:56 ` Ingo Molnar
2008-10-10 21:10 ` Linus Torvalds
2008-10-11 0:50 ` Tejun Heo
2008-10-11 1:42 ` H. Peter Anvin
2008-10-13 9:13 ` Tejun Heo
2008-10-13 11:07 ` [PATCH] block: add partition attribute for partition number Tejun Heo
2008-10-13 11:27 ` Jens Axboe
2008-10-11 7:11 ` [bug] latest -git boot hang Jens Axboe
2008-10-11 7:19 ` Ingo Molnar
2008-10-11 14:08 ` Jens Axboe
2008-10-11 14:33 ` Ingo Molnar
2008-10-11 14:39 ` Jens Axboe
2008-10-11 14:58 ` Ingo Molnar
2008-10-11 17:58 ` Jens Axboe
2008-10-13 6:41 ` Tejun Heo [this message]
2008-10-13 8:46 ` [PATCH] block: add BIG FAT WARNING to CONFIG_DEBUG_BLOCK_EXT_DEVT Jens Axboe
2008-10-14 15:15 ` Christoph Hellwig
2008-10-14 17:31 ` Tejun Heo
2008-10-14 15:07 ` [bug] latest -git boot hang Stephen Smalley
2008-10-14 15:12 ` Ingo Molnar
2008-10-14 15:24 ` Stephen Smalley
2008-10-15 1:48 ` Casey Schaufler
2008-10-13 8:41 ` Takashi Iwai
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