Merge tag 'for-5.2/block-20190507' of git://git.kernel.dk/linux-block

Pull block updates from Jens Axboe:
 "Nothing major in this series, just fixes and improvements all over the
  map. This contains:

   - Series of fixes for sed-opal (David, Jonas)

   - Fixes and performance tweaks for BFQ (via Paolo)

   - Set of fixes for bcache (via Coly)

   - Set of fixes for md (via Song)

   - Enabling multi-page for passthrough requests (Ming)

   - Queue release fix series (Ming)

   - Device notification improvements (Martin)

   - Propagate underlying device rotational status in loop (Holger)

   - Removal of mtip32xx trim support, which has been disabled for years
     (Christoph)

   - Improvement and cleanup of nvme command handling (Christoph)

   - Add block SPDX tags (Christoph)

   - Cleanup/hardening of bio/bvec iteration (Christoph)

   - A few NVMe pull requests (Christoph)

   - Removal of CONFIG_LBDAF (Christoph)

   - Various little fixes here and there"

* tag 'for-5.2/block-20190507' of git://git.kernel.dk/linux-block: (164 commits)
  block: fix mismerge in bvec_advance
  block: don't drain in-progress dispatch in blk_cleanup_queue()
  blk-mq: move cancel of hctx->run_work into blk_mq_hw_sysfs_release
  blk-mq: always free hctx after request queue is freed
  blk-mq: split blk_mq_alloc_and_init_hctx into two parts
  blk-mq: free hw queue's resource in hctx's release handler
  blk-mq: move cancel of requeue_work into blk_mq_release
  blk-mq: grab .q_usage_counter when queuing request from plug code path
  block: fix function name in comment
  nvmet: protect discovery change log event list iteration
  nvme: mark nvme_core_init and nvme_core_exit static
  nvme: move command size checks to the core
  nvme-fabrics: check more command sizes
  nvme-pci: check more command sizes
  nvme-pci: remove an unneeded variable initialization
  nvme-pci: unquiesce admin queue on shutdown
  nvme-pci: shutdown on timeout during deletion
  nvme-pci: fix psdt field for single segment sgls
  nvme-multipath: don't print ANA group state by default
  nvme-multipath: split bios with the ns_head bio_set before submitting
  ...

Documentation/block/bfq-iosched.txt

@@ -20,13 +20,26 @@ for that device, by setting low_latency to 0. See Section 3 for
 details on how to configure BFQ for the desired tradeoff between
 latency and throughput, or on how to maximize throughput.
 
-BFQ has a non-null overhead, which limits the maximum IOPS that a CPU
-can process for a device scheduled with BFQ. To give an idea of the
-limits on slow or average CPUs, here are, first, the limits of BFQ for
-three different CPUs, on, respectively, an average laptop, an old
-desktop, and a cheap embedded system, in case full hierarchical
-support is enabled (i.e., CONFIG_BFQ_GROUP_IOSCHED is set), but
-CONFIG_DEBUG_BLK_CGROUP is not set (Section 4-2):
+As every I/O scheduler, BFQ adds some overhead to per-I/O-request
+processing. To give an idea of this overhead, the total,
+single-lock-protected, per-request processing time of BFQ---i.e., the
+sum of the execution times of the request insertion, dispatch and
+completion hooks---is, e.g., 1.9 us on an Intel Core i7-2760QM@2.40GHz
+(dated CPU for notebooks; time measured with simple code
+instrumentation, and using the throughput-sync.sh script of the S
+suite [1], in performance-profiling mode). To put this result into
+context, the total, single-lock-protected, per-request execution time
+of the lightest I/O scheduler available in blk-mq, mq-deadline, is 0.7
+us (mq-deadline is ~800 LOC, against ~10500 LOC for BFQ).
+
+Scheduling overhead further limits the maximum IOPS that a CPU can
+process (already limited by the execution of the rest of the I/O
+stack). To give an idea of the limits with BFQ, on slow or average
+CPUs, here are, first, the limits of BFQ for three different CPUs, on,
+respectively, an average laptop, an old desktop, and a cheap embedded
+system, in case full hierarchical support is enabled (i.e.,
+CONFIG_BFQ_GROUP_IOSCHED is set), but CONFIG_DEBUG_BLK_CGROUP is not
+set (Section 4-2):
 - Intel i7-4850HQ: 400 KIOPS
 - AMD A8-3850: 250 KIOPS
 - ARM CortexTM-A53 Octa-core: 80 KIOPS
@@ -566,3 +579,5 @@ applications. Unset this tunable if you need/want to control weights.
     Slightly extended version:
     http://algogroup.unimore.it/people/paolo/disk_sched/bfq-v1-suite-
 							results.pdf
+
+[3] https://github.com/Algodev-github/S

Documentation/block/null_blk.txt

@@ -93,3 +93,7 @@ zoned=[0/1]: Default: 0
 
 zone_size=[MB]: Default: 256
   Per zone size when exposed as a zoned block device. Must be a power of two.
+
+zone_nr_conv=[nr_conv]: Default: 0
+  The number of conventional zones to create when block device is zoned.  If
+  zone_nr_conv >= nr_zones, it will be reduced to nr_zones - 1.

Documentation/process/submit-checklist.rst

@@ -72,47 +72,44 @@ and elsewhere regarding submitting Linux kernel patches.
 13) Has been build- and runtime tested with and without ``CONFIG_SMP`` and
     ``CONFIG_PREEMPT.``
 
-14) If the patch affects IO/Disk, etc: has been tested with and without
-    ``CONFIG_LBDAF.``
+16) All codepaths have been exercised with all lockdep features enabled.
 
-15) All codepaths have been exercised with all lockdep features enabled.
+17) All new ``/proc`` entries are documented under ``Documentation/``
 
-16) All new ``/proc`` entries are documented under ``Documentation/``
-
-17) All new kernel boot parameters are documented in
+18) All new kernel boot parameters are documented in
     ``Documentation/admin-guide/kernel-parameters.rst``.
 
-18) All new module parameters are documented with ``MODULE_PARM_DESC()``
+19) All new module parameters are documented with ``MODULE_PARM_DESC()``
 
-19) All new userspace interfaces are documented in ``Documentation/ABI/``.
+20) All new userspace interfaces are documented in ``Documentation/ABI/``.
     See ``Documentation/ABI/README`` for more information.
     Patches that change userspace interfaces should be CCed to
     linux-api@vger.kernel.org.
 
-20) Check that it all passes ``make headers_check``.
+21) Check that it all passes ``make headers_check``.
 
-21) Has been checked with injection of at least slab and page-allocation
+22) Has been checked with injection of at least slab and page-allocation
     failures.  See ``Documentation/fault-injection/``.
 
     If the new code is substantial, addition of subsystem-specific fault
     injection might be appropriate.
 
-22) Newly-added code has been compiled with ``gcc -W`` (use
+23) Newly-added code has been compiled with ``gcc -W`` (use
     ``make EXTRA_CFLAGS=-W``).  This will generate lots of noise, but is good
     for finding bugs like "warning: comparison between signed and unsigned".
 
-23) Tested after it has been merged into the -mm patchset to make sure
+24) Tested after it has been merged into the -mm patchset to make sure
     that it still works with all of the other queued patches and various
     changes in the VM, VFS, and other subsystems.
 
-24) All memory barriers {e.g., ``barrier()``, ``rmb()``, ``wmb()``} need a
+25) All memory barriers {e.g., ``barrier()``, ``rmb()``, ``wmb()``} need a
     comment in the source code that explains the logic of what they are doing
     and why.
 
-25) If any ioctl's are added by the patch, then also update
+26) If any ioctl's are added by the patch, then also update
     ``Documentation/ioctl/ioctl-number.txt``.
 
-26) If your modified source code depends on or uses any of the kernel
+27) If your modified source code depends on or uses any of the kernel
     APIs or features that are related to the following ``Kconfig`` symbols,
     then test multiple builds with the related ``Kconfig`` symbols disabled
     and/or ``=m`` (if that option is available) [not all of these at the

Documentation/translations/ja_JP/SubmitChecklist

@@ -74,38 +74,34 @@ Linux カーネルパッチ投稿者向けチェックリスト
 13: CONFIG_SMP, CONFIG_PREEMPT を有効にした場合と無効にした場合の両方で
     ビルドした上、動作確認を行ってください。
 
-14: もしパッチがディスクのI/O性能などに影響を与えるようであれば、
-    'CONFIG_LBDAF'オプションを有効にした場合と無効にした場合の両方で
-    テストを実施してみてください。
+14: lockdepの機能を全て有効にした上で、全てのコードパスを評価してください。
 
-15: lockdepの機能を全て有効にした上で、全てのコードパスを評価してください。
-
-16: /proc に新しいエントリを追加した場合には、Documentation/ 配下に
+15: /proc に新しいエントリを追加した場合には、Documentation/ 配下に
     必ずドキュメントを追加してください。
 
-17: 新しいブートパラメータを追加した場合には、
+16: 新しいブートパラメータを追加した場合には、
     必ずDocumentation/admin-guide/kernel-parameters.rst に説明を追加してください。
 
-18: 新しくmoduleにパラメータを追加した場合には、MODULE_PARM_DESC()を
+17: 新しくmoduleにパラメータを追加した場合には、MODULE_PARM_DESC()を
     利用して必ずその説明を記述してください。
 
-19: 新しいuserspaceインタフェースを作成した場合には、Documentation/ABI/ に
+18: 新しいuserspaceインタフェースを作成した場合には、Documentation/ABI/ に
     Documentation/ABI/README を参考にして必ずドキュメントを追加してください。
 
-20: 'make headers_check'を実行して全く問題がないことを確認してください。
+19: 'make headers_check'を実行して全く問題がないことを確認してください。
 
-21: 少なくともslabアロケーションとpageアロケーションに失敗した場合の
+20: 少なくともslabアロケーションとpageアロケーションに失敗した場合の
     挙動について、fault-injectionを利用して確認してください。
     Documentation/fault-injection/ を参照してください。
 
     追加したコードがかなりの量であったならば、サブシステム特有の
     fault-injectionを追加したほうが良いかもしれません。
 
-22: 新たに追加したコードは、`gcc -W'でコンパイルしてください。
+21: 新たに追加したコードは、`gcc -W'でコンパイルしてください。
     このオプションは大量の不要なメッセージを出力しますが、
     "warning: comparison between signed and unsigned" のようなメッセージは、
     バグを見つけるのに役に立ちます。
 
-23: 投稿したパッチが -mm パッチセットにマージされた後、全ての既存のパッチや
+22: 投稿したパッチが -mm パッチセットにマージされた後、全ての既存のパッチや
     VM, VFS およびその他のサブシステムに関する様々な変更と、現時点でも共存
     できることを確認するテストを行ってください。

arch/arc/configs/haps_hs_defconfig

@@ -15,7 +15,6 @@ CONFIG_PERF_EVENTS=y
 # CONFIG_COMPAT_BRK is not set
 CONFIG_SLAB=y
 CONFIG_MODULES=y
-# CONFIG_LBDAF is not set
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set

arch/arc/configs/haps_hs_smp_defconfig

@@ -17,7 +17,6 @@ CONFIG_PERF_EVENTS=y
 CONFIG_SLAB=y
 CONFIG_KPROBES=y
 CONFIG_MODULES=y
-# CONFIG_LBDAF is not set
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set

arch/arc/configs/nsim_700_defconfig

@@ -18,7 +18,6 @@ CONFIG_PERF_EVENTS=y
 CONFIG_ISA_ARCOMPACT=y
 CONFIG_KPROBES=y
 CONFIG_MODULES=y
-# CONFIG_LBDAF is not set
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set

arch/arc/configs/nsim_hs_defconfig

@@ -20,7 +20,6 @@ CONFIG_MODULES=y
 CONFIG_MODULE_FORCE_LOAD=y
 CONFIG_MODULE_UNLOAD=y
 CONFIG_MODULE_FORCE_UNLOAD=y
-# CONFIG_LBDAF is not set
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set

arch/arc/configs/nsim_hs_smp_defconfig

@@ -18,7 +18,6 @@ CONFIG_MODULES=y
 CONFIG_MODULE_FORCE_LOAD=y
 CONFIG_MODULE_UNLOAD=y
 CONFIG_MODULE_FORCE_UNLOAD=y
-# CONFIG_LBDAF is not set
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set

arch/arc/configs/nsimosci_defconfig

@@ -18,7 +18,6 @@ CONFIG_PERF_EVENTS=y
 CONFIG_ISA_ARCOMPACT=y
 CONFIG_KPROBES=y
 CONFIG_MODULES=y
-# CONFIG_LBDAF is not set
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set

arch/arc/configs/nsimosci_hs_defconfig

@@ -17,7 +17,6 @@ CONFIG_PERF_EVENTS=y
 # CONFIG_COMPAT_BRK is not set
 CONFIG_KPROBES=y
 CONFIG_MODULES=y
-# CONFIG_LBDAF is not set
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set

arch/arc/configs/nsimosci_hs_smp_defconfig

@@ -12,7 +12,6 @@ CONFIG_PERF_EVENTS=y
 # CONFIG_COMPAT_BRK is not set
 CONFIG_KPROBES=y
 CONFIG_MODULES=y
-# CONFIG_LBDAF is not set
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set

arch/arm/configs/aspeed_g4_defconfig

@@ -23,7 +23,6 @@ CONFIG_SLAB_FREELIST_RANDOM=y
 CONFIG_JUMP_LABEL=y
 CONFIG_STRICT_KERNEL_RWX=y
 CONFIG_GCC_PLUGINS=y
-# CONFIG_LBDAF is not set
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_BLK_DEBUG_FS is not set
 # CONFIG_IOSCHED_DEADLINE is not set

arch/arm/configs/aspeed_g5_defconfig

@@ -23,7 +23,6 @@ CONFIG_SLAB_FREELIST_RANDOM=y
 CONFIG_JUMP_LABEL=y
 CONFIG_STRICT_KERNEL_RWX=y
 CONFIG_GCC_PLUGINS=y
-# CONFIG_LBDAF is not set
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_BLK_DEBUG_FS is not set
 # CONFIG_IOSCHED_DEADLINE is not set

arch/arm/configs/at91_dt_defconfig

@@ -9,7 +9,6 @@ CONFIG_EMBEDDED=y
 CONFIG_SLAB=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
-# CONFIG_LBDAF is not set
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set

arch/arm/configs/clps711x_defconfig

@@ -6,7 +6,6 @@ CONFIG_RD_LZMA=y
 CONFIG_EMBEDDED=y
 CONFIG_SLOB=y
 CONFIG_JUMP_LABEL=y
-# CONFIG_LBDAF is not set
 CONFIG_PARTITION_ADVANCED=y
 # CONFIG_IOSCHED_CFQ is not set
 CONFIG_ARCH_CLPS711X=y

arch/arm/configs/efm32_defconfig

@@ -11,7 +11,6 @@ CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_EMBEDDED=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_SLUB_DEBUG is not set
-# CONFIG_LBDAF is not set
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set

arch/arm/configs/ezx_defconfig

@@ -13,7 +13,6 @@ CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
 CONFIG_MODULE_FORCE_UNLOAD=y
 CONFIG_MODVERSIONS=y
-# CONFIG_LBDAF is not set
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_IOSCHED_CFQ is not set
 CONFIG_ARCH_PXA=y

arch/arm/configs/h3600_defconfig

@@ -4,7 +4,6 @@ CONFIG_HIGH_RES_TIMERS=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_MODULES=y
-# CONFIG_LBDAF is not set
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set

arch/arm/configs/imote2_defconfig

@@ -12,7 +12,6 @@ CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
 CONFIG_MODULE_FORCE_UNLOAD=y
 CONFIG_MODVERSIONS=y
-# CONFIG_LBDAF is not set
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_IOSCHED_CFQ is not set
 CONFIG_ARCH_PXA=y