Theodore Tso wrote: > On Sat, Apr 19, 2008 at 01:44:51PM +0400, Alexey Zaytsev wrote: >> If it is a block containing a metadata object fsck has already read, >> than we already know what kind of object it is (there must be a way >> to quickly find all cached objects derived from a given block), and >> can update the cached version. And if fsck has not yet read the >> block, it can just be ignored, no matter what kind of data it >> contains. If it contains metadata and fsck is intrested in it, it >> will read it sooner or later anyway. If it contains file data, why >> should fsck even care? It seems to me that what the proposed project really does, in essence, is a read-only check of a filesystem snapshot. It's just that the snapshot is proposed to be constructed in a complex and non-generic (and maybe impossible) way. If you really just want to verify a snapshot of the fs at a point in time, surely there are simpler ways. If the device is on lvm, there's already a script floating around to do it in automated fasion. (I'd pondered the idea of introducing META_WRITE (to go with META_READ) and maybe lvm could do a "metadata-only" snapshot to be lighter weight?) -Eric -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
