On Wed, Sep 21, 2016 at 11:15:50AM +0800, Qu Wenruo wrote: > The branch can be fetched from my github: > https://github.com/adam900710/btrfs-progs/tree/lowmem_fs_tree
I've put it into integration but haven't reviewed nor tested it. > Already merged lowmem mode fsck only works for extent/chunk tree check. > And for fs tree, it's still using original mode codes. > > This makes btrfs check still eat tons of memory for large fs. > > Now the new lowmem mode code will also cover fs tree now, to make > lowmem mode be really low-memory usage mode. > > And the whole patchset goes through the whole fsck test cases, except > the following case: > > 006: There is a bug in root item repair code, causing backref error. > However old fsck has another bug to overwrite extent tree error, > so old fsck will only report error but still return 0. > > That's an unrelated btrfsck repair bug, which I'll address it later. > > 015: Just wrong test cases. It's not a normal check-repair-check one. > So the check after repair will still report error. > Better to put it to fuzz test cases. > > Further plan for lowmem mode is: > 1) Add support for --repair > A lot of work again. > > 2) Separate original and lowmem mode codes into different files > 300+K single source is really too large. > Better separate them into a dir and multiple files Makes sense. We're about to split the files by other criteria (kernel, etc) so this will possible once the details are fleshed out. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
