Linux kernel documentation tree maintained by Jonathan Corbet http://mirrors.hust.edu.cn/git/lwn.git/atom?h=docs-6.9 2024-01-20T17:42:32+00:00 2024-01-20T17:42:32+00:00 Linus Torvalds torvalds@linux-foundation.org 2024-01-20T17:42:32+00:00 urn:sha1:c25b24fa72c734f8cd6c31a13548013263b26286 Pull SCSI updates from James Bottomley: "Final round of fixes that came in too late to send in the first request. It's nine bug fixes and one version update (because of a bug fix) and one set of PCI ID additions. There's one bug fix in the core which is really a one liner (except that an additional sdev pointer was added for convenience) and the rest are in drivers" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: target: core: Add TMF to tmr_list handling scsi: core: Kick the requeue list after inserting when flushing scsi: fnic: unlock on error path in fnic_queuecommand() scsi: fcoe: Fix unsigned comparison with zero in store_ctlr_mode() scsi: mpi3mr: Fix mpi3mr_fw.c kernel-doc warnings scsi: smartpqi: Bump driver version to 2.1.26-030 scsi: smartpqi: Fix logical volume rescan race condition scsi: smartpqi: Add new controller PCI IDs scsi: ufs: qcom: Remove unnecessary goto statement from ufs_qcom_config_esi() scsi: ufs: core: Remove the ufshcd_hba_exit() call from ufshcd_async_scan() scsi: ufs: core: Simplify power management during async scan 2024-01-19T00:44:03+00:00 Linus Torvalds torvalds@linux-foundation.org 2024-01-19T00:44:03+00:00 urn:sha1:0b7359ccddaaa844044c62000734f0cb92ab6310 Pull virtio updates from Michael Tsirkin: - vdpa/mlx5: support for resumable vqs - virtio_scsi: mq_poll support - 3virtio_pmem: support SHMEM_REGION - virtio_balloon: stay awake while adjusting balloon - virtio: support for no-reset virtio PCI PM - Fixes, cleanups * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: vdpa/mlx5: Add mkey leak detection vdpa/mlx5: Introduce reference counting to mrs vdpa/mlx5: Use vq suspend/resume during .set_map vdpa/mlx5: Mark vq state for modification in hw vq vdpa/mlx5: Mark vq addrs for modification in hw vq vdpa/mlx5: Introduce per vq and device resume vdpa/mlx5: Allow modifying multiple vq fields in one modify command vdpa/mlx5: Expose resumable vq capability vdpa: Block vq property changes in DRIVER_OK vdpa: Track device suspended state scsi: virtio_scsi: Add mq_poll support virtio_pmem: support feature SHMEM_REGION virtio_balloon: stay awake while adjusting balloon vdpa: Remove usage of the deprecated ida_simple_xx() API virtio: Add support for no-reset virtio PCI PM virtio_net: fix missing dma unmap for resize vhost-vdpa: account iommu allocations vdpa: Fix an error handling path in eni_vdpa_probe() 2024-01-18T22:35:29+00:00 Linus Torvalds torvalds@linux-foundation.org 2024-01-18T22:35:29+00:00 urn:sha1:a2ded784cd7fd83e567829637068cd86aeffbeaf Pull tracing updates from Steven Rostedt: - Allow kernel trace instance creation to specify what events are created Inside the kernel, a subsystem may create a tracing instance that it can use to send events to user space. This sub-system may not care about the thousands of events that exist in eventfs. Allow the sub-system to specify what sub-systems of events it cares about, and only those events are exposed to this instance. - Allow the ring buffer to be broken up into bigger sub-buffers than just the architecture page size. A new tracefs file called "buffer_subbuf_size_kb" is created. The user can now specify a minimum size the sub-buffer may be in kilobytes. Note, that the implementation currently make the sub-buffer size a power of 2 pages (1, 2, 4, 8, 16, ...) but the user only writes in kilobyte size, and the sub-buffer will be updated to the next size that it will can accommodate it. If the user writes in 10, it will change the size to be 4 pages on x86 (16K), as that is the next available size that can hold 10K pages. - Update the debug output when a corrupt time is detected in the ring buffer. If the ring buffer detects inconsistent timestamps, there's a debug config options that will dump the contents of the meta data of the sub-buffer that is used for debugging. Add some more information to this dump that helps with debugging. - Add more timestamp debugging checks (only triggers when the config is enabled) - Increase the trace_seq iterator to 2 page sizes. - Allow strings written into tracefs_marker to be larger. Up to just under 2 page sizes (based on what trace_seq can hold). - Increase the trace_maker_raw write to be as big as a sub-buffer can hold. - Remove 32 bit time stamp logic, now that the rb_time_cmpxchg() has been removed. - More selftests were added. - Some code clean ups as well. * tag 'trace-v6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: (29 commits) ring-buffer: Remove stale comment from ring_buffer_size() tracing histograms: Simplify parse_actions() function tracing/selftests: Remove exec permissions from trace_marker.tc test ring-buffer: Use subbuf_order for buffer page masking tracing: Update subbuffer with kilobytes not page order ringbuffer/selftest: Add basic selftest to test changing subbuf order ring-buffer: Add documentation on the buffer_subbuf_order file ring-buffer: Just update the subbuffers when changing their allocation order ring-buffer: Keep the same size when updating the order tracing: Stop the tracing while changing the ring buffer subbuf size tracing: Update snapshot order along with main buffer order ring-buffer: Make sure the spare sub buffer used for reads has same size ring-buffer: Do no swap cpu buffers if order is different ring-buffer: Clear pages on error in ring_buffer_subbuf_order_set() failure ring-buffer: Read and write to ring buffers with custom sub buffer size ring-buffer: Set new size of the ring buffer sub page ring-buffer: Add interface for configuring trace sub buffer size ring-buffer: Page size per ring buffer ring-buffer: Have ring_buffer_print_page_header() be able to access ring_buffer_iter ring-buffer: Check if absolute timestamp goes backwards ... 2024-01-18T00:23:17+00:00 Linus Torvalds torvalds@linux-foundation.org 2024-01-18T00:23:17+00:00 urn:sha1:e1aa9df440186af73a9e690244eb49cbc99f36ac Pull pci updates from Bjorn Helgaas: "Enumeration: - Reserve ECAM so we don't assign it to PCI BARs; this works around bugs where BIOS included ECAM in a PNP0A03 host bridge window, didn't reserve it via a PNP0C02 motherboard device, and didn't allocate space for SR-IOV VF BARs (Bjorn Helgaas) - Add MMCONFIG/ECAM debug logging (Bjorn Helgaas) - Rename 'MMCONFIG' to 'ECAM' to match spec usage (Bjorn Helgaas) - Log device type (Root Port, Switch Port, etc) during enumeration (Bjorn Helgaas) - Log bridges before downstream devices so the dmesg order is more logical (Bjorn Helgaas) - Log resource names (BAR 0, VF BAR 0, bridge window, etc) consistently instead of a mix of names and "reg 0x10" (Puranjay Mohan, Bjorn Helgaas) - Fix 64GT/s effective data rate calculation to use 1b/1b encoding rather than the 8b/10b or 128b/130b used by lower rates (Ilpo Järvinen) - Use PCI_HEADER_TYPE_* instead of literals in x86, powerpc, SCSI lpfc (Ilpo Järvinen) - Clean up open-coded PCIBIOS return code mangling (Ilpo Järvinen) Resource management: - Restructure pci_dev_for_each_resource() to avoid computing the address of an out-of-bounds array element (the bounds check was performed later so the element was never actually *read*, but it's nicer to avoid even computing an out-of-bounds address) (Andy Shevchenko) Driver binding: - Convert pci-host-common.c platform .remove() callback to .remove_new() returning 'void' since it's not useful to return error codes here (Uwe Kleine-König) - Convert exynos, keystone, kirin from .remove() to .remove_new(), which returns void instead of int (Uwe Kleine-König) - Drop unused struct pci_driver.node member (Mathias Krause) Virtualization: - Add ACS quirk for more Zhaoxin Root Ports (LeoLiuoc) Error handling: - Log AER errors as "Correctable" (not "Corrected") or "Uncorrectable" to match spec terminology (Bjorn Helgaas) - Decode Requester ID when no error info found instead of printing the raw hex value (Bjorn Helgaas) Endpoint framework: - Use a unique test pattern for each BAR in the pci_endpoint_test to make it easier to debug address translation issues (Niklas Cassel) Broadcom STB PCIe controller driver: - Add DT property "brcm,clkreq-mode" and driver support for different CLKREQ# modes to make ASPM L1.x states possible (Jim Quinlan) Freescale Layerscape PCIe controller driver: - Add suspend/resume support for Layerscape LS1043a and LS1021a, including software-managed PME_Turn_Off and transitions between L0, L2/L3_Ready Link states (Frank Li) MediaTek PCIe controller driver: - Clear MSI interrupt status before handler to avoid missing MSIs that occur after the handler (qizhong cheng) MediaTek PCIe Gen3 controller driver: - Update mediatek-gen3 translation window setup to handle MMIO space that is not a power of two in size (Jianjun Wang) Qualcomm PCIe controller driver: - Increase qcom iommu-map maxItems to accommodate SDX55 (five entries) and SDM845 (sixteen entries) (Krzysztof Kozlowski) - Describe qcom,pcie-sc8180x clocks and resets accurately (Krzysztof Kozlowski) - Describe qcom,pcie-sm8150 clocks and resets accurately (Krzysztof Kozlowski) - Correct the qcom "reset-name" property, previously incorrectly called "reset-names" (Krzysztof Kozlowski) - Document qcom,pcie-sm8650, based on qcom,pcie-sm8550 (Neil Armstrong) Renesas R-Car PCIe controller driver: - Replace of_device.h with explicit of.h include to untangle header usage (Rob Herring) - Add DT and driver support for optional miniPCIe 1.5v and 3.3v regulators on KingFisher (Wolfram Sang) SiFive FU740 PCIe controller driver: - Convert fu740 CONFIG_PCIE_FU740 dependency from SOC_SIFIVE to ARCH_SIFIVE (Conor Dooley) Synopsys DesignWare PCIe controller driver: - Align iATU mapping for endpoint MSI-X (Niklas Cassel) - Drop "host_" prefix from struct dw_pcie_host_ops members (Yoshihiro Shimoda) - Drop "ep_" prefix from struct dw_pcie_ep_ops members (Yoshihiro Shimoda) - Rename struct dw_pcie_ep_ops.func_conf_select() to .get_dbi_offset() to be more descriptive (Yoshihiro Shimoda) - Add Endpoint DBI accessors to encapsulate offset lookups (Yoshihiro Shimoda) TI J721E PCIe driver: - Add j721e DT and driver support for 'num-lanes' for devices that support x1, x2, or x4 Links (Matt Ranostay) - Add j721e DT compatible strings and driver support for j784s4 (Matt Ranostay) - Make TI J721E Kconfig depend on ARCH_K3 since the hardware is specific to those TI SoC parts (Peter Robinson) TI Keystone PCIe controller driver: - Hold power management references to all PHYs while enabling them to avoid a race when one provides clocks to others (Siddharth Vadapalli) Xilinx XDMA PCIe controller driver: - Remove redundant dev_err(), since platform_get_irq() and platform_get_irq_byname() already log errors (Yang Li) - Fix uninitialized symbols in xilinx_pl_dma_pcie_setup_irq() (Krzysztof Wilczyński) - Fix xilinx_pl_dma_pcie_init_irq_domain() error return when irq_domain_add_linear() fails (Harshit Mogalapalli) MicroSemi Switchtec management driver: - Do dma_mrpc cleanup during switchtec_pci_remove() to match its devm ioremapping in switchtec_pci_probe(). Previously the cleanup was done in stdev_release(), which used stale pointers if stdev->cdev happened to be open when the PCI device was removed (Daniel Stodden) Miscellaneous: - Convert interrupt terminology from "legacy" to "INTx" to be more specific and match spec terminology (Damien Le Moal) - In dw-xdata-pcie, pci_endpoint_test, and vmd, replace usage of deprecated ida_simple_*() API with ida_alloc() and ida_free() (Christophe JAILLET)" * tag 'pci-v6.8-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: (97 commits) PCI: Fix kernel-doc issues PCI: brcmstb: Configure HW CLKREQ# mode appropriate for downstream device dt-bindings: PCI: brcmstb: Add property "brcm,clkreq-mode" PCI: mediatek-gen3: Fix translation window size calculation PCI: mediatek: Clear interrupt status before dispatching handler PCI: keystone: Fix race condition when initializing PHYs PCI: xilinx-xdma: Fix error code in xilinx_pl_dma_pcie_init_irq_domain() PCI: xilinx-xdma: Fix uninitialized symbols in xilinx_pl_dma_pcie_setup_irq() PCI: rcar-gen4: Fix -Wvoid-pointer-to-enum-cast error PCI: iproc: Fix -Wvoid-pointer-to-enum-cast warning PCI: dwc: Add dw_pcie_ep_{read,write}_dbi[2] helpers PCI: dwc: Rename .func_conf_select to .get_dbi_offset in struct dw_pcie_ep_ops PCI: dwc: Rename .ep_init to .init in struct dw_pcie_ep_ops PCI: dwc: Drop host prefix from struct dw_pcie_host_ops members misc: pci_endpoint_test: Use a unique test pattern for each BAR PCI: j721e: Make TI J721E depend on ARCH_K3 PCI: j721e: Add TI J784S4 PCIe configuration PCI/AER: Use explicit register sizes for struct members PCI/AER: Decode Requester ID when no error info found PCI/AER: Use 'Correctable' and 'Uncorrectable' spec terms for errors ... 2024-01-12T02:37:43+00:00 Niklas Cassel cassel@kernel.org 2024-01-11T12:05:32+00:00 urn:sha1:6df0e077d76bd144c533b61d6182676aae6b0a85 When libata calls ata_link_abort() to abort all ata queued commands, it calls blk_abort_request() on the SCSI command representing each QC. This causes scsi_timeout() to be called, which calls scsi_eh_scmd_add() for each SCSI command. scsi_eh_scmd_add() sets the SCSI host to state recovery, and then adds the command to shost->eh_cmd_q. This will wake up the SCSI EH, and eventually the libata EH strategy handler will be called, which calls scsi_eh_flush_done_q() to either flush retry or flush finish each failed command. The commands that are flush retried by scsi_eh_flush_done_q() are done so using scsi_queue_insert(). Before commit 8b566edbdbfb ("scsi: core: Only kick the requeue list if necessary"), __scsi_queue_insert() called blk_mq_requeue_request() with the second argument set to true, indicating that it should always kick/run the requeue list after inserting. After commit 8b566edbdbfb ("scsi: core: Only kick the requeue list if necessary"), __scsi_queue_insert() does not kick/run the requeue list after inserting, if the current SCSI host state is recovery (which is the case in the libata example above). This optimization is probably fine in most cases, as I can only assume that most often someone will eventually kick/run the queues. However, that is not the case for scsi_eh_flush_done_q(), where we can see that the request gets inserted to the requeue list, but the queue is never started after the request has been inserted, leading to the block layer waiting for the completion of command that never gets to run. Since scsi_eh_flush_done_q() is called by SCSI EH context, the SCSI host state is most likely always in recovery when this function is called. Thus, let scsi_eh_flush_done_q() explicitly kick the requeue list after inserting a flush retry command, so that scsi_eh_flush_done_q() keeps the same behavior as before commit 8b566edbdbfb ("scsi: core: Only kick the requeue list if necessary"). Simple reproducer for the libata example above: $ hdparm -Y /dev/sda $ echo 1 > /sys/class/scsi_device/0\:0\:0\:0/device/delete Fixes: 8b566edbdbfb ("scsi: core: Only kick the requeue list if necessary") Reported-by: Kevin Locke <kevin@kevinlocke.name> Closes: https://lore.kernel.org/linux-scsi/ZZw3Th70wUUvCiCY@kevinlocke.name/ Signed-off-by: Niklas Cassel <cassel@kernel.org> Link: https://lore.kernel.org/r/20240111120533.3612509-1-cassel@kernel.org Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> 2024-01-12T02:35:28+00:00 Dan Carpenter dan.carpenter@linaro.org 2024-01-10T18:41:55+00:00 urn:sha1:38945c2b006b23a1a7a0c88d76e3294c6199891c Call spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags) before returning. Fixes: c81df08cd294 ("scsi: fnic: Add support for multiqueue (MQ) in fnic driver") Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org> Link: https://lore.kernel.org/r/5360fa20-74bc-4c22-a78e-ea8b18c5410d@moroto.mountain Reviewed-by: Karan Tilak Kumar <kartilak@cisco.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> 2024-01-12T02:26:26+00:00 Harshit Mogalapalli harshit.m.mogalapalli@oracle.com 2024-01-02T08:52:45+00:00 urn:sha1:567a1e852e872e702b18d271a3dbce2a75efbaff ctlr->mode is of unsigned type, it is never less than zero. Fix this by using an extra variable called 'res', to store return value from sysfs_match_string() and assign that to ctlr->mode on the success path. Fixes: edc22a7c8688 ("scsi: fcoe: Use sysfs_match_string() over fcoe_parse_mode()") Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com> Link: https://lore.kernel.org/r/20240102085245.600570-1-harshit.m.mogalapalli@oracle.com Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> 2024-01-11T22:24:32+00:00 Linus Torvalds torvalds@linux-foundation.org 2024-01-11T22:24:32+00:00 urn:sha1:22d29f1112c85c1ad519a8c0403f7f7289cf060c Pull SCSI updates from James Bottomley: "Updates to the usual drivers (ufs, mpi3mr, mpt3sas, lpfc, fnic, hisi_sas, arcmsr, ) plus the usual assorted minor fixes and updates. This time around there's only a single line update to the core, so nothing major and barely anything minor" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (135 commits) scsi: ufs: core: Simplify ufshcd_auto_hibern8_update() scsi: ufs: core: Rename ufshcd_auto_hibern8_enable() and make it static scsi: ufs: qcom: Fix ESI vector mask scsi: ufs: host: Fix kernel-doc warning scsi: hisi_sas: Correct the number of global debugfs registers scsi: hisi_sas: Rollback some operations if FLR failed scsi: hisi_sas: Check before using pointer variables scsi: hisi_sas: Replace with standard error code return value scsi: hisi_sas: Set .phy_attached before notifing phyup event HISI_PHYE_PHY_UP_PM scsi: ufs: core: Add sysfs node for UFS RTC update scsi: ufs: core: Add UFS RTC support scsi: ufs: core: Add ufshcd_is_ufs_dev_busy() scsi: ufs: qcom: Remove unused definitions scsi: ufs: qcom: Use ufshcd_rmwl() where applicable scsi: ufs: qcom: Remove support for host controllers older than v2.0 scsi: ufs: qcom: Simplify ufs_qcom_{assert/deassert}_reset scsi: ufs: qcom: Initialize cycles_in_1us variable in ufs_qcom_set_core_clk_ctrl() scsi: ufs: qcom: Sort includes alphabetically scsi: ufs: qcom: Remove unused ufs_qcom_hosts struct array scsi: ufs: qcom: Use dev_err_probe() to simplify error handling of devm_gpiod_get_optional() ... 2024-01-11T21:58:04+00:00 Linus Torvalds torvalds@linux-foundation.org 2024-01-11T21:58:04+00:00 urn:sha1:01d550f0fcc06c7292f79a6f1453aac122d1d2c8 Pull block updates from Jens Axboe: "Pretty quiet round this time around. This contains: - NVMe updates via Keith: - nvme fabrics spec updates (Guixin, Max) - nvme target udpates (Guixin, Evan) - nvme attribute refactoring (Daniel) - nvme-fc numa fix (Keith) - MD updates via Song: - Fix/Cleanup RCU usage from conf->disks[i].rdev (Yu Kuai) - Fix raid5 hang issue (Junxiao Bi) - Add Yu Kuai as Reviewer of the md subsystem - Remove deprecated flavors (Song Liu) - raid1 read error check support (Li Nan) - Better handle events off-by-1 case (Alex Lyakas) - Efficiency improvements for passthrough (Kundan) - Support for mapping integrity data directly (Keith) - Zoned write fix (Damien) - rnbd fixes (Kees, Santosh, Supriti) - Default to a sane discard size granularity (Christoph) - Make the default max transfer size naming less confusing (Christoph) - Remove support for deprecated host aware zoned model (Christoph) - Misc fixes (me, Li, Matthew, Min, Ming, Randy, liyouhong, Daniel, Bart, Christoph)" * tag 'for-6.8/block-2024-01-08' of git://git.kernel.dk/linux: (78 commits) block: Treat sequential write preferred zone type as invalid block: remove disk_clear_zoned sd: remove the !ZBC && blk_queue_is_zoned case in sd_read_block_characteristics drivers/block/xen-blkback/common.h: Fix spelling typo in comment blk-cgroup: fix rcu lockdep warning in blkg_lookup() blk-cgroup: don't use removal safe list iterators block: floor the discard granularity to the physical block size mtd_blkdevs: use the default discard granularity bcache: use the default discard granularity zram: use the default discard granularity null_blk: use the default discard granularity nbd: use the default discard granularity ubd: use the default discard granularity block: default the discard granularity to sector size bcache: discard_granularity should not be smaller than a sector block: remove two comments in bio_split_discard block: rename and document BLK_DEF_MAX_SECTORS loop: don't abuse BLK_DEF_MAX_SECTORS aoe: don't abuse BLK_DEF_MAX_SECTORS null_blk: don't cap max_hw_sectors to BLK_DEF_MAX_SECTORS ... 2024-01-10T18:01:37+00:00 Mike Christie michael.christie@oracle.com 2023-12-14T05:26:49+00:00 urn:sha1:95e7249691f082a5178d4d6f60fcdee91da458ab This adds polling support to virtio-scsi. It's based on and works similar to virtblk support where we add a module param to specify the number of poll queues then subtract to calculate the IO queues. When using 8 poll queues and a vhost worker per queue we see 4K IOPs with fio: fio --filename=/dev/sda --direct=1 --rw=randread --bs=4k \ --ioengine=io_uring --hipri --iodepth=128 --numjobs=$NUM_JOBS increase like: jobs base poll 1 207K 296K 2 392K 552K 3 581K 860K 4 765K 1235K 5 936K 1598K 6 1104K 1880K 7 1253K 2095K 8 1311k 2187K Signed-off-by: Mike Christie <michael.christie@oracle.com> Message-Id: <20231214052649.57743-1-michael.christie@oracle.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>