- 26 Jun, 2018 22 commits
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Ming Lei authored
It isn't necessary to check the host depth in scsi_queue_rq() any more since it has been respected by blk-mq before calling scsi_queue_rq() via getting driver tag. Lots of LUNs may attach to same host and per-host IOPS may reach millions, so we should avoid expensive atomic operations on the host-wide counter in the IO path. This patch implements scsi_host_busy() via blk_mq_tagset_busy_iter() for reading the count of busy IOs for scsi_mq. It is observed that IOPS is increased by 15% in IO test on scsi_debug (32 LUNs, 32 submit queues, 1024 can_queue, libaio/dio) in a dual-socket system. [mkp: clarified commit message] Cc: Omar Sandoval <osandov@fb.com>, Cc: "Martin K. Petersen" <martin.petersen@oracle.com>, Cc: James Bottomley <james.bottomley@hansenpartnership.com>, Cc: Christoph Hellwig <hch@lst.de>, Cc: Don Brace <don.brace@microsemi.com> Cc: Kashyap Desai <kashyap.desai@broadcom.com> Cc: Mike Snitzer <snitzer@redhat.com> Cc: Hannes Reinecke <hare@suse.de> Cc: Laurence Oberman <loberman@redhat.com> Cc: Bart Van Assche <bart.vanassche@wdc.com> Signed-off-by:
Ming Lei <ming.lei@redhat.com> Reviewed-by:
Bart Van Assche <bart.vanassche@wdc.com> Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com>
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Ming Lei authored
No functional change. Just introduce scsi_host_busy() and replace the direct read of scsi_host->host_busy with this new API. Cc: Omar Sandoval <osandov@fb.com>, Cc: "Martin K. Petersen" <martin.petersen@oracle.com>, Cc: James Bottomley <james.bottomley@hansenpartnership.com>, Cc: Christoph Hellwig <hch@lst.de>, Cc: Don Brace <don.brace@microsemi.com> Cc: Kashyap Desai <kashyap.desai@broadcom.com> Cc: Mike Snitzer <snitzer@redhat.com> Cc: Hannes Reinecke <hare@suse.de> Cc: Laurence Oberman <loberman@redhat.com> Cc: Bart Van Assche <bart.vanassche@wdc.com> Signed-off-by:
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Bart Van Assche authored
Since blk_rq_bytes(req) returns req->__data_len, assigning that value to req->__data_len is superfluous. Hence remove that assignment. See also commit 5db44863 ("[SCSI] sd: Implement support for WRITE SAME"). Signed-off-by:
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Bart Van Assche authored
This patch avoids that smatch reports the following warnings: drivers/scsi/qedi/qedi_fw_api.c:129: init_sqe() warn: inconsistent indenting drivers/scsi/qedi/qedi_fw_api.c:137: init_sqe() warn: inconsistent indenting Signed-off-by:
Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by:
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Johannes Thumshirn authored
Some drivers are ADDing the scsi command's result bytes instead of ORing them. While this can produce correct results it has unexpected side effects. Signed-off-by:
Christoph Hellwig <hch@lst.de> Reviewed-by:
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Johannes Thumshirn authored
When evaluating a SCSI command's result using the field access macros, check for equality of the fields and not if a specific bit is set. This is a preparation patch, for reworking the results field in the SCSI command. Signed-off-by:
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Douglas Gilbert authored
The scsi_io_completion function contains three BUG() and BUG_ON() calls. Replace them with WARN variants. Signed-off-by:
Douglas Gilbert <dgilbert@interlog.com> Reviewed-by:
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Douglas Gilbert authored
Add likely() and unlikely() hints to conditionals on or near the fastpath. Signed-off-by:
Hannes Reinecke <hare@suse.com> Signed-off-by:
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Douglas Gilbert authored
Since the action "reprep" is called from two places, rather than repeat the code, make a new scsi_io_completion helper with "reprep" as its suffix. Signed-off-by:
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Douglas Gilbert authored
Place scsi_io_completion()'s complex error processing associated with a local enumeration into a static helper function. That enumeration's values start with "ACTION_" so use the suffix "_action" in the helper function's name. Signed-off-by:
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Douglas Gilbert authored
Break out several intertwined paths when cmd->result is non zero and place them in the scsi_io_completion_nz_result helper function. The logic is not changed. Signed-off-by:
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Douglas Gilbert authored
Change and add some variable names, adjust some associated comments for clarity. Correct some misleading comments. Signed-off-by:
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Douglas Gilbert authored
scsi_end_request() is called multiple times from scsi_io_completion() which branches on its bool returned value. Add comment before the static definition of scsi_end_request() about the meaning of that return. Signed-off-by:
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Mike Christie authored
target_find_device is no longer used, so remove it. Signed-off-by:
Mike Christie <mchristi@redhat.com> Tested-by:
Xiubo Li <xiubli@redhat.com> Signed-off-by:
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Mike Christie authored
This patch based on Xiubo's patches adds 2 tcmu attr to block and reset the netlink interface. It's used during userspace daemon reinitialization after the daemon has crashed while there is outstanding nl requests. The daemon can block the nl interface, kill outstanding requests in the kernel and then reopen the netlink socket and unblock it to allow new requests. [mkp: typo] Signed-off-by:
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Mike Christie authored
Some misc cleanup of the nl rework patches. 1. Fix space instead of tabs use and extra newline 2. Drop initializing variables to 0 when not needed 3. Just pass the skb_buff and msg_header pointers to tcmu_netlink_event_send. Signed-off-by:
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Mike Christie authored
Just return EBUSY if a nl request comes in while processing one. The upper layers do not support sending multiple create/remove requests at the same time (you cannot have a create and remove at the same time or do multiple creates or removes at the same time) and doing a reconfig while a create/remove is still executing does not make sense. Signed-off-by:
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Mike Christie authored
The next patch is going to fix the hung nl command issue so this adds a list of outstanding nl commands that we can later abort when the daemon is restarted. Signed-off-by:
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Mike Christie authored
When this code changed, this was never cleaned up. Signed-off-by:
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Arnd Bergmann authored
The get_seconds() function suffers from a possible overflow in 2038 or 2106, as well as jitter due to settimeofday or leap second updates, and is deprecated. As we are interested in elapsed time only, using ktime_get_seconds() to read the CLOCK_MONOTONIC timebase is ideal here. This also lets us remove the hack that tries to deal with get_seconds() going slightly backwards, which cannot happen with montonic timestamps. Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Reviewed-by:
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Arnd Bergmann authored
The get_seconds() helper returns an 'unsigned long' value, which can overflow on 32-bit architectures. Since the interface we pass it into already uses a 64-bit type, we can just use ktime_get_real_seconds() instead. While we generally prefer local timestamps in CLOCK_MONOTONIC format (ktime_get_seconds), this keeps using the CLOCK_REALTIME version in order to maintain compatibility with existing code. Signed-off-by:
Tyrel Datwyler <tyreld@linux.vnet.ibm.com> Reviewed-by:
James Smart <james.smart@broadcom.com> Signed-off-by:
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Arnd Bergmann authored
get_seconds() can overflow on 32-bit architectures and is deprecated because of that. The use in the aacraid driver has the same problem due to a limited firmware interface, it also overflows in the year 2106. This changes all calls to get_seconds() to the non-deprecated ktime_get_real_seconds(), which unfortunately doesn't solve that problem but gets rid of one user of the deprecated interface. [mkp: checkpatch] Signed-off-by:
Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com> Signed-off-by:
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- 22 Jun, 2018 1 commit
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Souptick Joarder authored
Use new return type vm_fault_t for fault handler. For now, this is just documenting that the function returns a VM_FAULT value rather than an errno. Once all instances are converted, vm_fault_t will become a distinct type. Ref-> commit 1c8f4220 ("mm: change return type to vm_fault_t") Previously, VM_FAULT_NOPAGE was returned without verifying return value of vm_insert_pfn. The new inline vmf_insert_pfn() will address this issue by returning correct VM_FAULT_* type from fault handler. Signed-off-by:
Souptick Joarder <jrdr.linux@gmail.com> Acked-by:
Matthew R. Ochs <mrochs@linux.vnet.ibm.com> Signed-off-by:
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- 20 Jun, 2018 17 commits
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Don Brace authored
Reviewed-by:
Scott Benesh <scott.benesh@microsemi.com> Signed-off-by:
Kevin Barnett <kevin.barnett@microsemi.com> Signed-off-by:
Don Brace <don.brace@microsemi.com> Signed-off-by:
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Kevin Barnett authored
Use the readl() kernel function to read all index registers. For ARM systems, this function includes a read memory barrier that eliminates ci/pi corruption. Reviewed-by:
Scott Teel <scott.teel@microsemi.com> Tested-by:
Shunyong Yang <shunyong.yang@hxt-semitech.com> Signed-off-by:
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Kevin Barnett authored
Add support for these new device IDs: Advantech MIC-8312BridgeB INSPUR PM8204-2GB INSPUR PM8204-4GB INSPUR PM8222-SHBA Reviewed-by:
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Kevin Barnett authored
Detect rare error cases for synchronous requests down the RAID path. Also retry INQUIRY of VPD page 0 sent to an HBA drive if the command failed due to an abort. Reviewed-by:
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Kevin Barnett authored
Decrement the active thread count after the synchronous request was submitted to the controller but before the driver blocks to wait for the request to complete. Reviewed-by:
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Bart Van Assche authored
Avoids that warnings about the kernel headers appear when building with W=1. Remove useless "@Returns - Nothing" clauses. Change "@Return - " into "Return: ". Signed-off-by:
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Bart Van Assche authored
scsi: mpt3sas: Split _base_reset_handler(), mpt3sas_scsih_reset_handler() and mpt3sas_ctl_reset_handler() Split each of these functions in three functions - one function per reset phase. This patch does not change any functionality but makes the code easier to read. Note: it is much easier to review the git diff -w output after having applied this patch than by reviewing the patch itself. Signed-off-by:
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Bart Van Assche authored
Since ioc->shost_recovery is set after ioc->reset_in_progress_mutex is obtained, if concurrent resets are issued there is a short time during which ioc->reset_in_progress_mutex is locked and ioc->shost_recovery == 0. Avoid that this can cause trouble by unconditionally locking ioc->shost_recovery. Signed-off-by:
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Bart Van Assche authored
This patch avoids that smatch complains about a double unlock on ioc->transport_cmds.mutex. Fixes: 651a0136 ("scsi: scsi_transport_sas: switch to bsg-lib for SMP passthrough") Signed-off-by:
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Bart Van Assche authored
Make _base_build_nvme_prp() easier to read by introducing a structure to access NVMe command fields. Signed-off-by:
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Bart Van Assche authored
This patch avoids that gcc complains about switch/case fall-through when building with W=1. Signed-off-by:
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Bart Van Assche authored
This patch does not change any functionality. Signed-off-by:
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Bart Van Assche authored
Modify the indentation such that smatch no longer complains about inconsistent indenting. Signed-off-by:
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Jason Yan authored
Commit 2623c7a5 ("libata: add refcounting to ata_host") v4.17+ introduced refcounting to ata_host and will increase or decrease the refcount when adding or deleting transport ATA port. Now the ata host for libsas is embedded in domain_device, and the ->kref member is not initialized. Afer we add ata transport class, ata_host_get() will be called when adding transport ATA port and a warning will be triggered as below: refcount_t: increment on 0; use-after-free. WARNING: CPU: 2 PID: 103 at lib/refcount.c:153 refcount_inc+0x40/0x48 ...... Call trace: refcount_inc+0x40/0x48 ata_host_get+0x10/0x18 ata_tport_add+0x40/0x120 ata_sas_tport_add+0xc/0x14 sas_ata_init+0x7c/0xc8 sas_discover_domain+0x380/0x53c process_one_work+0x12c/0x288 worker_thread+0x58/0x3f0 kthread+0xfc/0x128 ret_from_fork+0x10/0x18 And also when removing transport ATA port ata_host_put() will be called and another similar warning will be triggered. If the refcount decreased to zero, the ata host will be freed. But this ata host is only part of domain_device, it cannot be freed directly. So we have to change this embedded static ata host to a dynamically allocated ata host and initialize the ->kref member. To use ata_host_get() and ata_host_put() in libsas, we need to move the declaration of these functions to the public libata.h and export them. Fixes: b6240a4d ("scsi: libsas: add transport class for ATA devices") Signed-off-by:
Jason Yan <yanaijie@huawei.com> CC: John Garry <john.garry@huawei.com> CC: Taras Kondratiuk <takondra@cisco.com> CC: Tejun Heo <tj@kernel.org> Acked-by:
Tejun Heo <tj@kernel.org> Signed-off-by:
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Matthew Wilcox authored
With its one user gone, remove the library code. Signed-off-by:
Matthew Wilcox <willy@infradead.org> Reviewed-by:
Jens Axboe <axboe@kernel.dk> Signed-off-by:
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Matthew Wilcox authored
The sbitmap and the percpu_ida perform essentially the same task, allocating tags for commands. The sbitmap outperforms the percpu_ida as documented here: https://lkml.org/lkml/2014/4/22/553 The sbitmap interface is a little harder to use, but being able to remove the percpu_ida code and getting better performance justifies the additional complexity. Signed-off-by:
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Matthew Wilcox authored
Introduce target_free_tag() and convert all drivers to use it. Signed-off-by:
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