Re: `fsck -A` and fs-specific options

[Mike Frysinger <vapier@gentoo.org>]

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On Wednesday, July 13, 2011 07:17:27 Theodore Tso wrote:
> On Jul 12, 2011, at 3:18 PM, Mike Frysinger wrote:
> > when i read the kernel source, that seemed to be the case.  but i dont
> > think it's the case for reiserfs, and i think there's a very tiny edge
> > case with ext[34] related to moving the journal, but probably so small
> > we can ignore it :p.
> 
> What do you think the edge case is?   Yes, the external journal's
> dev_t is cached, but that is only used by the kernel since it
> was simpler than having callouts to a userspace daemon.
> 
> E2fsck will use blkid to locate the external journal, and when it
> finds it, it will update the cached dev_t if it is out of date, so that
> at mount time the kernel will be able to find the external journal.
> This way even if the external journal is on a device with an
> unstable dev_t (e.g., a USB device), the right thing should
> happen...

that sounds like it covers all the non-pathological cases ;)
-mike

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