On 11/16/21 12:56 PM, Xiubo Li wrote:
On 11/9/21 8:33 PM, Jeff Layton wrote:
On Mon, 2021-11-08 at 20:57 -0500, Jeff Layton wrote:
[...]
...I suspect this is related to the 075 failures, but I don't see
it on
every attempt, which makes me think "race condition". I'll keep
hunting.
Yeah, seems the same issue.
I wonder if we're hitting the same problem that this patch was intended
to fix:
057ba5b24532 ceph: Fix race between hole punch and page fault
It seems like the problem is very similar. It may be worth testing a
patch that takes the filemap_invalidate_lock across the on the wire
truncate and the vmtruncate.
Nope. I tried a draft patch that make setattr hold this lock over the
MDS call and the vmtruncate and it didn't help.
It's buggy by using the `filer.write_trunc()` caller in MDS side, it
works well in case the truncate_from - truncate_size < 4MB, or it will
keep the stale file contents without trimming or zeroing them.
I will push the MDS side PR to fix it.
Have updated the MDS side PR.
Both the generic/030 and generic/075 tests passed, and I am still
testing others.
BRs
-- Xiubo
Thanks
-- Xiubo
Cheers,
