On Tue, Jun 23, 2015 at 03:30:43PM -0400, Matthew Wilcox wrote: > > I can't make any guarantees, especially not without verification. But > > if correctly implemented any filesystems that does out of place metadata > > writes (and that includes a traditional log) and uses checksum to ensure > > the integrity of these updates it should be fine. You'd still have > > the issue of sector atomicy of file I/O though. > > Is ext4 one of the filesystems that copes with torn updates to the log? > I see there's a checksum in the tail of at least some blocks, but I'd > like someone who understands ext4 to reassure me that it also doesn't > need the ability to put its log on a BTT.
In theory it should if the log checksums are enabled, but I wouldn't rely on it without without confirmation and validation from the ext4 folks. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
