The patchset (along with "backref lost" bug fixes and test cases) can be
fetched from github:
https://github.com/adam900710/btrfs-progs/tree/lowmem_fix
Despite the backref lost false alerts reported by Chris Murphy, there
are still some other bugs to be fixed.
One is also exposed by Chris Murphy, where btrfs-progs backref can't
handle shared block ref for metadata. Fix by 1st patch.
And 2 more bugs exposed by the test image which is originally designed
for the bug fixed by 1st patch.
Last but not the least, here comes the test image.
Which is an image with a lot of metadata and under a relocation.
It is definitely a bomb for old lowmem check.
Qu Wenruo (4):
btrfs-progs: backref: Allow backref walk to handle direct parent ref
btrfs-progs: lowmem check: Fix function call stack overflow caused by
wrong tree reloc tree detection
btrfs-progs: lowmem check: Fix false alerts for image with shared
block ref only backref
btrfs-progs: fsck-test: Add new image with shared block ref only
metadata backref
backref.c | 3 ++
cmds-check.c | 35 +++++++++++++++++----
.../020-extent-ref-cases/shared_block_ref_only.img | Bin 0 -> 304128 bytes
3 files changed, 32 insertions(+), 6 deletions(-)
create mode 100644
tests/fsck-tests/020-extent-ref-cases/shared_block_ref_only.img
--
2.15.0
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