Eric Lee / smarc-fsl-linux-kernel

29 Jul, 2015

1 commit

  • 4246a0b63   block: add a bi_error field to struct bio ... Browse Code »

    Currently we have two different ways to signal an I/O error on a BIO:

    (1) by clearing the BIO_UPTODATE flag
    (2) by returning a Linux errno value to the bi_end_io callback

    The first one has the drawback of only communicating a single possible
    error (-EIO), and the second one has the drawback of not beeing persistent
    when bios are queued up, and are not passed along from child to parent
    bio in the ever more popular chaining scenario. Having both mechanisms
    available has the additional drawback of utterly confusing driver authors
    and introducing bugs where various I/O submitters only deal with one of
    them, and the others have to add boilerplate code to deal with both kinds
    of error returns.

    So add a new bi_error field to store an errno value directly in struct
    bio and remove the existing mechanisms to clean all this up.

    Signed-off-by: Christoph Hellwig
    Reviewed-by: Hannes Reinecke
    Reviewed-by: NeilBrown
    Signed-off-by: Jens Axboe

    Christoph Hellwig
     

20 Mar, 2015

1 commit

14 Dec, 2014

1 commit

  • caf292ae5   Merge branch 'for-3.19/core' of git://git.kernel.dk/linux-block ... Browse Code »

    Pull block driver core update from Jens Axboe:
    "This is the pull request for the core block IO changes for 3.19. Not
    a huge round this time, mostly lots of little good fixes:

    - Fix a bug in sysfs blktrace interface causing a NULL pointer
    dereference, when enabled/disabled through that API. From Arianna
    Avanzini.

    - Various updates/fixes/improvements for blk-mq:

    - A set of updates from Bart, mostly fixing buts in the tag
    handling.

    - Cleanup/code consolidation from Christoph.

    - Extend queue_rq API to be able to handle batching issues of IO
    requests. NVMe will utilize this shortly. From me.

    - A few tag and request handling updates from me.

    - Cleanup of the preempt handling for running queues from Paolo.

    - Prevent running of unmapped hardware queues from Ming Lei.

    - Move the kdump memory limiting check to be in the correct
    location, from Shaohua.

    - Initialize all software queues at init time from Takashi. This
    prevents a kobject warning when CPUs are brought online that
    weren't online when a queue was registered.

    - Single writeback fix for I_DIRTY clearing from Tejun. Queued with
    the core IO changes, since it's just a single fix.

    - Version X of the __bio_add_page() segment addition retry from
    Maurizio. Hope the Xth time is the charm.

    - Documentation fixup for IO scheduler merging from Jan.

    - Introduce (and use) generic IO stat accounting helpers for non-rq
    drivers, from Gu Zheng.

    - Kill off artificial limiting of max sectors in a request from
    Christoph"

    * 'for-3.19/core' of git://git.kernel.dk/linux-block: (26 commits)
    bio: modify __bio_add_page() to accept pages that don't start a new segment
    blk-mq: Fix uninitialized kobject at CPU hotplugging
    blktrace: don't let the sysfs interface remove trace from running list
    blk-mq: Use all available hardware queues
    blk-mq: Micro-optimize bt_get()
    blk-mq: Fix a race between bt_clear_tag() and bt_get()
    blk-mq: Avoid that __bt_get_word() wraps multiple times
    blk-mq: Fix a use-after-free
    blk-mq: prevent unmapped hw queue from being scheduled
    blk-mq: re-check for available tags after running the hardware queue
    blk-mq: fix hang in bt_get()
    blk-mq: move the kdump check to blk_mq_alloc_tag_set
    blk-mq: cleanup tag free handling
    blk-mq: use 'nr_cpu_ids' as highest CPU ID count for hwq cpu map
    blk: introduce generic io stat accounting help function
    blk-mq: handle the single queue case in blk_mq_hctx_next_cpu
    genhd: check for int overflow in disk_expand_part_tbl()
    blk-mq: add blk_mq_free_hctx_request()
    blk-mq: export blk_mq_free_request()
    blk-mq: use get_cpu/put_cpu instead of preempt_disable/preempt_enable
    ...

    Linus Torvalds
     

12 Nov, 2014

1 commit

  • 125c99bc8   scsi: add new scsi-command flag for tagged commands ... Browse Code »

    Currently scsi piggy backs on the block layer to define the concept
    of a tagged command. But we want to be able to have block-level host-wide
    tags assigned even for untagged commands like the initial INQUIRY, so add
    a new SCSI-level flag for commands that are tagged at the scsi level, so
    that even commands without that set can have tags assigned to them. Note
    that this alredy is the case for the blk-mq code path, and this just lets
    the old path catch up with it.

    We also set this flag based upon sdev->simple_tags instead of the block
    queue flag, so that it is entirely independent of the block layer tagging,
    and thus always correct even if a driver doesn't use block level tagging
    yet.

    Also remove the old blk_rq_tagged; it was only used by SCSI drivers, and
    removing it forces them to look for the proper replacement.

    Signed-off-by: Christoph Hellwig
    Reviewed-by: Mike Christie
    Reviewed-by: Martin K. Petersen
    Reviewed-by: Hannes Reinecke

    Christoph Hellwig
     

04 Nov, 2014

1 commit

24 Nov, 2013

1 commit

  • 4f024f379   block: Abstract out bvec iterator ... Browse Code »

    Immutable biovecs are going to require an explicit iterator. To
    implement immutable bvecs, a later patch is going to add a bi_bvec_done
    member to this struct; for now, this patch effectively just renames
    things.

    Signed-off-by: Kent Overstreet
    Cc: Jens Axboe
    Cc: Geert Uytterhoeven
    Cc: Benjamin Herrenschmidt
    Cc: Paul Mackerras
    Cc: "Ed L. Cashin"
    Cc: Nick Piggin
    Cc: Lars Ellenberg
    Cc: Jiri Kosina
    Cc: Matthew Wilcox
    Cc: Geoff Levand
    Cc: Yehuda Sadeh
    Cc: Sage Weil
    Cc: Alex Elder
    Cc: ceph-devel@vger.kernel.org
    Cc: Joshua Morris
    Cc: Philip Kelleher
    Cc: Rusty Russell
    Cc: "Michael S. Tsirkin"
    Cc: Konrad Rzeszutek Wilk
    Cc: Jeremy Fitzhardinge
    Cc: Neil Brown
    Cc: Alasdair Kergon
    Cc: Mike Snitzer
    Cc: dm-devel@redhat.com
    Cc: Martin Schwidefsky
    Cc: Heiko Carstens
    Cc: linux390@de.ibm.com
    Cc: Boaz Harrosh
    Cc: Benny Halevy
    Cc: "James E.J. Bottomley"
    Cc: Greg Kroah-Hartman
    Cc: "Nicholas A. Bellinger"
    Cc: Alexander Viro
    Cc: Chris Mason
    Cc: "Theodore Ts'o"
    Cc: Andreas Dilger
    Cc: Jaegeuk Kim
    Cc: Steven Whitehouse
    Cc: Dave Kleikamp
    Cc: Joern Engel
    Cc: Prasad Joshi
    Cc: Trond Myklebust
    Cc: KONISHI Ryusuke
    Cc: Mark Fasheh
    Cc: Joel Becker
    Cc: Ben Myers
    Cc: xfs@oss.sgi.com
    Cc: Steven Rostedt
    Cc: Frederic Weisbecker
    Cc: Ingo Molnar
    Cc: Len Brown
    Cc: Pavel Machek
    Cc: "Rafael J. Wysocki"
    Cc: Herton Ronaldo Krzesinski
    Cc: Ben Hutchings
    Cc: Andrew Morton
    Cc: Guo Chao
    Cc: Tejun Heo
    Cc: Asai Thambi S P
    Cc: Selvan Mani
    Cc: Sam Bradshaw
    Cc: Wei Yongjun
    Cc: "Roger Pau Monné"
    Cc: Jan Beulich
    Cc: Stefano Stabellini
    Cc: Ian Campbell
    Cc: Sebastian Ott
    Cc: Christian Borntraeger
    Cc: Minchan Kim
    Cc: Jiang Liu
    Cc: Nitin Gupta
    Cc: Jerome Marchand
    Cc: Joe Perches
    Cc: Peng Tao
    Cc: Andy Adamson
    Cc: fanchaoting
    Cc: Jie Liu
    Cc: Sunil Mushran
    Cc: "Martin K. Petersen"
    Cc: Namjae Jeon
    Cc: Pankaj Kumar
    Cc: Dan Magenheimer
    Cc: Mel Gorman 6

    Kent Overstreet
     

09 Sep, 2012

1 commit

  • 4254bba17   block: Kill bi_destructor ... Browse Code »

    Now that we've got generic code for freeing bios allocated from bio
    pools, this isn't needed anymore.

    This patch also makes bio_free() static, since without bi_destructor
    there should be no need for it to be called anywhere else.

    bio_free() is now only called from bio_put, so we can refactor those a
    bit - move some code from bio_put() to bio_free() and kill the redundant
    bio->bi_next = NULL.

    v5: Switch to BIO_KMALLOC_POOL ((void *)~0), per Boaz
    v6: BIO_KMALLOC_POOL now NULL, drop bio_free's EXPORT_SYMBOL
    v7: No #define BIO_KMALLOC_POOL anymore

    Signed-off-by: Kent Overstreet
    CC: Jens Axboe
    Signed-off-by: Jens Axboe

    Kent Overstreet
     

28 Sep, 2011

1 commit

  • 395cf9691   doc: fix broken references ... Browse Code »

    There are numerous broken references to Documentation files (in other
    Documentation files, in comments, etc.). These broken references are
    caused by typo's in the references, and by renames or removals of the
    Documentation files. Some broken references are simply odd.

    Fix these broken references, sometimes by dropping the irrelevant text
    they were part of.

    Signed-off-by: Paul Bolle
    Signed-off-by: Jiri Kosina

    Paul Bolle
     

31 Mar, 2011

1 commit

10 Mar, 2011

1 commit

  • 7eaceacca   block: remove per-queue plugging ... Browse Code »
    86

    Code has been converted over to the new explicit on-stack plugging,
    and delay users have been converted to use the new API for that.
    So lets kill off the old plugging along with aops->sync_page().

    Signed-off-by: Jens Axboe

    Jens Axboe
     

05 Aug, 2010

1 commit

08 Mar, 2010

1 commit

03 Jan, 2010

1 commit

02 Jun, 2009

1 commit

15 Apr, 2009

1 commit

30 Jan, 2009

2 commits

  • 7598909e3   Mark mandatory elevator functions in the biodoc.txt ... Browse Code »

    biodoc.txt mentions that elevator functions marked with * are mandatory, but
    no function is marked with *. Mark the 3 functions which should be
    implemented by any io scheduler.

    Signed-off-by: Nikanth Karthikesan
    Signed-off-by: Jens Axboe

    Nikanth Karthikesan
     
  • 5872fb94f   Documentation: move DMA-mapping.txt to Doc/PCI/ ... Browse Code »

    Move DMA-mapping.txt to Documentation/PCI/.

    DMA-mapping.txt was supposed to be moved from Documentation/ to
    Documentation/PCI/. The 00-INDEX files in those two directories
    were updated, along with a few other text files, but the file
    itself somehow escaped being moved, so move it and update more
    text files and source files with its new location.

    Signed-off-by: Randy Dunlap
    Acked-by: Greg Kroah-Hartman
    cc: Jesse Barnes
    Signed-off-by: Linus Torvalds

    Randy Dunlap
     

29 Dec, 2008

1 commit

22 Apr, 2008

1 commit