[pve-devel] [PATCH zfsonlinux v2 0/2] Update to ZFS 2.2.4

[Stoiko Ivanov]

v1->v2:
Patch 2/2 (adaptation of arc_summary/arcstat patch) modified:
* right after sending the v1 I saw a report where pinning kernel 6.2 (thus
  ZFS 2.1) leads to a similar traceback - which I seem to have overlooked
  when packaging 2.2.0 ...
  adapted the patch by booting a VM with kernel 6.2 and the current
  userspace and running arc_summary /arcstat -a until no traceback was
  displayed with a single-disk pool.

original cover-letter for v1:
This patchset updates ZFS to the recently released 2.2.4

We had about half of the patches already in 2.2.3-2, due to the needed
support for kernel 6.8.

Compared to the last 2.2 point releases this one compares quite a few
potential performance improvments:
* for ZVOL workloads (relevant for qemu guests) multiple taskq were
  introduced [1] - this change is active by default (can be put back to
  the old behavior with explicitly setting `zvol_num_taskqs=1`
* the interface for ZFS submitting operations to the kernel's block layer
  was augmented to better deal with split-pages [2] - which should also
  improve performance, and prevent unaligned writes which are rejected by
  e.g. the SCSI subsystem. - The default remains with the current code
  (`zfs_vdev_disk_classic=0` turns on the 'new' behavior...)
* Speculative prefetching was improved [3], which introduced not kstats,
  which are reported by`arc_summary` and `arcstat`, as before with the
  MRU/MFU additions there was not guard for running the new user-space
  with an old kernel resulting in Python exceptions of both tools.
  I adapted the patch where Thomas fixed that back in the 2.1 release
  times. - sending as separate patch for easier review - and I hope it's
  ok that I dropped the S-o-b tag (as it's changed code) - glad to resend
  it, if this should be adapted.

Minimally tested on 2 VMs (the arcstat/arc_summary changes by running with
an old kernel and new user-space)


[0] https://github.com/openzfs/zfs/releases/tag/zfs-2.2.4
[1] https://github.com/openzfs/zfs/pull/15992
[2] https://github.com/openzfs/zfs/pull/15588
[3] https://github.com/openzfs/zfs/pull/16022

Stoiko Ivanov (2):
  update zfs submodule to 2.2.4 and refresh patches
  update arc_summary arcstat patch with new introduced values

 ...md-unit-for-importing-specific-pools.patch |   4 +-
 ...-move-manpage-arcstat-1-to-arcstat-8.patch |   2 +-
 ...-guard-access-to-freshly-introduced-.patch | 438 ++++++++++++
 ...-guard-access-to-l2arc-MFU-MRU-stats.patch | 113 ---
 ...hten-bounds-for-noalloc-stat-availab.patch |   4 +-
 ...rectly-handle-partition-16-and-later.patch |  52 --
 ...-use-splice_copy_file_range-for-fall.patch | 135 ----
 .../0014-linux-5.4-compat-page_size.patch     | 121 ----
 .../patches/0015-abd-add-page-iterator.patch  | 334 ---------
 ...-existing-functions-to-vdev_classic_.patch | 349 ---------
 ...v_disk-reorganise-vdev_disk_io_start.patch | 111 ---
 ...-read-write-IO-function-configurable.patch |  69 --
 ...e-BIO-filling-machinery-to-avoid-spl.patch | 671 ------------------
 ...dule-parameter-to-select-BIO-submiss.patch | 104 ---
 ...se-bio_chain-to-submit-multiple-BIOs.patch | 363 ----------
 ...on-t-use-compound-heads-on-Linux-4.5.patch |  96 ---
 ...ault-to-classic-submission-for-2.2.x.patch |  90 ---
 ...ion-caused-by-mmap-flushing-problems.patch | 104 ---
 ...touch-vbio-after-its-handed-off-to-t.patch |  57 --
 debian/patches/series                         |  16 +-
 upstream                                      |   2 +-
 21 files changed, 445 insertions(+), 2790 deletions(-)
 create mode 100644 debian/patches/0009-arc-stat-summary-guard-access-to-freshly-introduced-.patch
 delete mode 100644 debian/patches/0009-arc-stat-summary-guard-access-to-l2arc-MFU-MRU-stats.patch
 delete mode 100644 debian/patches/0012-udev-correctly-handle-partition-16-and-later.patch
 delete mode 100644 debian/patches/0013-Linux-6.8-compat-use-splice_copy_file_range-for-fall.patch
 delete mode 100644 debian/patches/0014-linux-5.4-compat-page_size.patch
 delete mode 100644 debian/patches/0015-abd-add-page-iterator.patch
 delete mode 100644 debian/patches/0016-vdev_disk-rename-existing-functions-to-vdev_classic_.patch
 delete mode 100644 debian/patches/0017-vdev_disk-reorganise-vdev_disk_io_start.patch
 delete mode 100644 debian/patches/0018-vdev_disk-make-read-write-IO-function-configurable.patch
 delete mode 100644 debian/patches/0019-vdev_disk-rewrite-BIO-filling-machinery-to-avoid-spl.patch
 delete mode 100644 debian/patches/0020-vdev_disk-add-module-parameter-to-select-BIO-submiss.patch
 delete mode 100644 debian/patches/0021-vdev_disk-use-bio_chain-to-submit-multiple-BIOs.patch
 delete mode 100644 debian/patches/0022-abd_iter_page-don-t-use-compound-heads-on-Linux-4.5.patch
 delete mode 100644 debian/patches/0023-vdev_disk-default-to-classic-submission-for-2.2.x.patch
 delete mode 100644 debian/patches/0024-Fix-corruption-caused-by-mmap-flushing-problems.patch
 delete mode 100644 debian/patches/0025-vdev_disk-don-t-touch-vbio-after-its-handed-off-to-t.patch

-- 
2.39.2