https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=222288
Andriy Gapon <a...@freebsd.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|New |Open
CC| |freebsd...@freebsd.org
Assignee|freebsd-bugs@FreeBSD.org |a...@freebsd.org
--- Comment #1 from Andriy Gapon <a...@freebsd.org> ---
(In reply to Dan Nelson from comment #0)
Thank you very much for the report!
As soon as I read it I noticed that I have the same kind of issue. I dug
through the biozone to examine the leaked bio-s and they all seem to have
bio_cmd = 5 and bio_flags = 8. So, they seem to be BIO_FLUSH bio-s. Their
zio-s must have been ZIO_TYPE_IOCTL.
Now, those zio-s use ZIO_IOCTL_PIPELINE and it is defined as:
#define ZIO_IOCTL_PIPELINE \
(ZIO_INTERLOCK_STAGES | \
ZIO_STAGE_VDEV_IO_START | \
ZIO_STAGE_VDEV_IO_ASSESS)
So, ZIO_STAGE_VDEV_IO_START is in the pipeline, but ZIO_STAGE_VDEV_IO_DONE is
not as you have correctly theorised.
The normal I/O pipelines always include ZIO_VDEV_IO_STAGES
#define ZIO_VDEV_IO_STAGES \
(ZIO_STAGE_VDEV_IO_START | \
ZIO_STAGE_VDEV_IO_DONE | \
ZIO_STAGE_VDEV_IO_ASSESS)
so the problem does not affect them.
I will double-check why the ioctl pipeline omitted ZIO_STAGE_VDEV_IO_DONE and
will test adding that stage.
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