Messages in this thread |  | | | Date | Thu, 03 Jul 2008 14:43:00 -0500 | | From | Eric Sandeen <> | | Subject | Re: [xfs-masters] Re: freeze vs freezer |
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Rafael J. Wysocki wrote:
>>> I talked with Jens about it on a very general level, but it seems doable at >>> first sight. >> Why would you hack the blok layer when we already have a perfectly fine >> facility to archive what you want? freeze_bdev is there exactly for the >> purpose to make the filesystem consistant on disk and then freeze all >> I/O. > > We tried that in the past and it didn't work very well due to some bad > interactions with the md layer that we wanted to stay functional while we > were saving the image.
Hm, details or a link?
> Also, do all of the supported filesystems implement this feature?
ext3, ext4, gfs2, jfs, reiserfs, xfs, all provide a write_super_lockfs op, which is what freeze_bdev uses. I think that the rest is generic, for simpler filesystems.
-Eric
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