From: Douglas Gilbert <dgilbert@interlog.com>
To: linux-scsi@vger.kernel.org
Cc: martin.petersen@oracle.com, jejb@linux.vnet.ibm.com,
hare@suse.de, kashyap.desai@broadcom.com
Subject: Re: [PATCH v13 44/45] sg: [RFC] add blk_poll support
Date: Wed, 13 Jan 2021 21:58:57 -0500 [thread overview]
Message-ID: <e6f5fda6-9fca-6981-fe67-9b11bbf0bb49@interlog.com> (raw)
In-Reply-To: <20210113224526.861000-45-dgilbert@interlog.com>
On 2021-01-13 5:45 p.m., Douglas Gilbert wrote:
> The support is added via the new SGV4_FLAG_HIPRI command flag which
> causes REQ_HIPRI to be set on the request. Before waiting on an
> inflight request, it is checked to see if it has SGV4_FLAG_HIPRI,
> and if so blk_poll() is called instead of the wait. In situations
> where only the file descriptor is known (e.g. sg_poll() and
> ioctl(SG_GET_NUM_WAITING)) all inflight requests associated with
> the file descriptor that have SGV4_FLAG_HIPRI set, have sg_poll()
s/have sg_poll/have blk_poll/
> called on them.
>
> Note that the implementation of blk_poll() calls mq_poll() in the
> LLD associated with the request. Then for any request found to be
> ready, blk_poll() invokes the scsi_done() callback. So this means
> if blk_poll() returns 1 then sg_rq_end_io() has already been
> called for the polled request.
<snip>
next prev parent reply other threads:[~2021-01-14 2:59 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-13 22:44 [PATCH v13 00/45] sg: add v4 interface Douglas Gilbert
2021-01-13 22:44 ` [PATCH v13 01/45] sg: move functions around Douglas Gilbert
2021-01-13 22:44 ` [PATCH v13 02/45] sg: remove typedefs, type+formatting cleanup Douglas Gilbert
2021-01-13 22:44 ` [PATCH v13 03/45] sg: sg_log and is_enabled Douglas Gilbert
2021-01-13 22:44 ` [PATCH v13 04/45] sg: rework sg_poll(), minor changes Douglas Gilbert
2021-01-13 22:44 ` [PATCH v13 05/45] sg: bitops in sg_device Douglas Gilbert
2021-01-13 22:44 ` [PATCH v13 06/45] sg: make open count an atomic Douglas Gilbert
2021-01-13 22:44 ` [PATCH v13 07/45] sg: move header to uapi section Douglas Gilbert
2021-01-13 22:44 ` [PATCH v13 08/45] sg: speed sg_poll and sg_get_num_waiting Douglas Gilbert
2021-01-13 22:44 ` [PATCH v13 09/45] sg: sg_allow_if_err_recovery and renames Douglas Gilbert
2021-01-13 22:44 ` [PATCH v13 10/45] sg: improve naming Douglas Gilbert
2021-01-13 22:44 ` [PATCH v13 11/45] sg: change rwlock to spinlock Douglas Gilbert
2021-01-13 22:44 ` [PATCH v13 12/45] sg: ioctl handling Douglas Gilbert
2021-01-13 22:44 ` [PATCH v13 13/45] sg: split sg_read Douglas Gilbert
2021-01-13 22:44 ` [PATCH v13 14/45] sg: sg_common_write add structure for arguments Douglas Gilbert
2021-01-13 22:44 ` [PATCH v13 15/45] sg: rework sg_vma_fault Douglas Gilbert
2021-01-13 22:44 ` [PATCH v13 16/45] sg: rework sg_mmap Douglas Gilbert
2021-01-13 22:44 ` [PATCH v13 17/45] sg: replace sg_allow_access Douglas Gilbert
2021-01-13 22:44 ` [PATCH v13 18/45] sg: rework scatter gather handling Douglas Gilbert
2021-01-13 22:45 ` [PATCH v13 19/45] sg: introduce request state machine Douglas Gilbert
2021-01-13 22:45 ` [PATCH v13 20/45] sg: sg_find_srp_by_id Douglas Gilbert
2021-01-13 22:45 ` [PATCH v13 21/45] sg: sg_fill_request_element Douglas Gilbert
2021-01-13 22:45 ` [PATCH v13 22/45] sg: printk change %p to %pK Douglas Gilbert
2021-01-13 22:45 ` [PATCH v13 23/45] sg: xarray for fds in device Douglas Gilbert
2021-01-13 22:45 ` [PATCH v13 24/45] sg: xarray for reqs in fd Douglas Gilbert
2021-01-13 22:45 ` [PATCH v13 25/45] sg: replace rq array with xarray Douglas Gilbert
2021-01-13 22:45 ` [PATCH v13 26/45] sg: sense buffer rework Douglas Gilbert
2021-01-13 22:45 ` [PATCH v13 27/45] sg: add sg v4 interface support Douglas Gilbert
2021-01-13 22:45 ` [PATCH v13 28/45] sg: rework debug info Douglas Gilbert
2021-01-14 7:12 ` Hannes Reinecke
2021-01-14 20:21 ` Douglas Gilbert
2021-01-13 22:45 ` [PATCH v13 29/45] sg: add 8 byte SCSI LUN to sg_scsi_id Douglas Gilbert
2021-01-13 22:45 ` [PATCH v13 30/45] sg: expand sg_comm_wr_t Douglas Gilbert
2021-01-13 22:45 ` [PATCH v13 31/45] sg: add sg_iosubmit_v3 and sg_ioreceive_v3 ioctls Douglas Gilbert
2021-01-13 22:45 ` [PATCH v13 32/45] sg: add some __must_hold macros Douglas Gilbert
2021-01-13 22:45 ` [PATCH v13 33/45] sg: move procfs objects to avoid forward decls Douglas Gilbert
2021-01-13 22:45 ` [PATCH v13 34/45] sg: protect multiple receivers Douglas Gilbert
2021-01-13 22:45 ` [PATCH v13 35/45] sg: first debugfs support Douglas Gilbert
2021-01-13 22:45 ` [PATCH v13 36/45] sg: rework mmap support Douglas Gilbert
2021-01-13 22:45 ` [PATCH v13 37/45] sg: defang allow_dio Douglas Gilbert
2021-01-14 7:15 ` Hannes Reinecke
2021-01-13 22:45 ` [PATCH v13 38/45] sg: warn v3 write system call users Douglas Gilbert
2021-01-13 22:45 ` [PATCH v13 39/45] sg: add mmap_sz tracking Douglas Gilbert
2021-01-14 7:18 ` Hannes Reinecke
2021-01-14 21:40 ` Douglas Gilbert
2021-01-13 22:45 ` [PATCH v13 40/45] sg: remove rcv_done request state Douglas Gilbert
2021-01-14 7:20 ` Hannes Reinecke
2021-01-13 22:45 ` [PATCH v13 41/45] sg: track lowest inactive and await indexes Douglas Gilbert
2021-01-14 7:25 ` Hannes Reinecke
2021-01-13 22:45 ` [PATCH v13 42/45] sg: remove unit attention check for device changed Douglas Gilbert
2021-01-14 7:26 ` Hannes Reinecke
2021-01-13 22:45 ` [PATCH v13 43/45] sg: no_dxfer: move to/from kernel buffers Douglas Gilbert
2021-01-14 7:30 ` Hannes Reinecke
2021-01-14 17:11 ` Douglas Gilbert
2021-01-15 16:17 ` Hannes Reinecke
2021-01-13 22:45 ` [PATCH v13 44/45] sg: [RFC] add blk_poll support Douglas Gilbert
2021-01-14 2:58 ` Douglas Gilbert [this message]
2021-01-14 7:35 ` Hannes Reinecke
2021-01-14 16:05 ` Douglas Gilbert
2021-01-15 16:25 ` Hannes Reinecke
2021-01-13 22:45 ` [PATCH v13 45/45] sg: bump version to 4.0.12 Douglas Gilbert
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