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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=48F2ED9F.7020606@kernel.org \
--to=tj@kernel.org \
--cc=akpm@linux-foundation.org \
--cc=hpa@zytor.com \
--cc=jens.axboe@oracle.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=tglx@linutronix.de \
--cc=torvalds@linux-foundation.org \
--cc=yinghai@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.