From: James Bottomley <James.Bottomley@SteelEye.com>
To: "Salyzyn, Mark" <mark_salyzyn@adaptec.com>
Cc: Harald Seipp <SEIPP@de.ibm.com>,
SCSI Mailing List <linux-scsi@vger.kernel.org>
Subject: RE: remove-single-device removes mounted HDDs (kernel 2.6)
Date: Thu, 11 Aug 2005 11:07:55 -0500 [thread overview]
Message-ID: <1123776475.5062.22.camel@mulgrave> (raw)
In-Reply-To: <547AF3BD0F3F0B4CBDC379BAC7E4189F01684D52@otce2k03.adaptec.com>
On Thu, 2005-08-11 at 11:51 -0400, Salyzyn, Mark wrote:
> The problem with pushing this policy to the user is that software
> applications have no means to determine that a device is currently
> in-use. For instance, the net result of pulling a device on a mounted
> filesystem is an eventual kernel panic.
The kernel only panics if you told it to with the mount option
errors=panic (or if you have errors=panic set in the superblock flags).
For file systems on removable devices you shouldn't be telling it to
panic on error, you should be telling it to continue or remount-ro. If
you do this then you can happily yank the undelying device on a mounted
fs, which was one of the design goals of the 2.6 SCSI state model and
refcounting reworks.
James
next prev parent reply other threads:[~2005-08-11 16:21 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-11 15:51 remove-single-device removes mounted HDDs (kernel 2.6) Salyzyn, Mark
2005-08-11 16:07 ` James Bottomley [this message]
2005-08-11 17:40 ` Bryan Henderson
2005-08-11 22:06 ` Stefan Richter
-- strict thread matches above, loose matches on Subject: below --
2005-09-06 21:28 [RFC] SCSI target for IBM Power5 LPAR Dave C Boutcher
2005-09-07 10:49 ` Christoph Hellwig
2005-09-07 12:45 ` Dave C Boutcher
2005-09-07 12:58 ` FUJITA Tomonori
2005-09-07 17:17 ` Mike Christie
2005-09-07 17:48 ` remove-single-device removes mounted HDDs (kernel 2.6) Steve Byan
2005-08-12 15:07 corene
2005-08-12 11:36 Salyzyn, Mark
2005-08-11 17:05 Salyzyn, Mark
2005-08-11 17:52 ` James Bottomley
2005-08-11 16:37 Salyzyn, Mark
2005-08-11 16:53 ` James Bottomley
2005-08-11 10:09 Harald Seipp
2005-08-11 11:55 ` Douglas Gilbert
2005-08-11 16:57 ` Harald Seipp
2005-08-11 13:59 ` James Bottomley
2005-08-11 14:32 ` Harald Seipp
2005-08-11 14:46 ` Matthew Wilcox
2005-08-11 14:51 ` James Bottomley
2005-08-11 15:44 ` Harald Seipp
2005-08-11 16:40 ` Christoph Hellwig
2005-08-11 16:50 ` Harald Seipp
2005-09-06 11:43 ` Christoph Hellwig
2005-08-11 17:47 ` Bryan Henderson
2005-08-12 8:59 ` Harald Seipp
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