Eric Lee / smarc-ti-linux-kernel

11 Feb, 2014

1 commit

  • 3cf8ca1c2   Documentation/: update 00-INDEX files ... Browse Code »

    Some of the 00-INDEX files are somewhat outdated and some folders does
    not contain 00-INDEX at all. Only outdated (with the notably exception
    of spi) indexes are touched here, the 169 folders without 00-INDEX has
    not been touched.

    New 00-INDEX
    - spi/* was added in a series of commits dating back to 2006

    Added files (missing in (*/)00-INDEX)
    - dmatest.txt was added by commit 851b7e16a07d ("dmatest: run test via
    debugfs")
    - this_cpu_ops.txt was added by commit a1b2a555d637 ("percpu: add
    documentation on this_cpu operations")
    - ww-mutex-design.txt was added by commit 040a0a371005 ("mutex: Add
    support for wound/wait style locks")
    - bcache.txt was added by commit cafe56359144 ("bcache: A block layer
    cache")
    - kernel-per-CPU-kthreads.txt was added by commit 49717cb40410
    ("kthread: Document ways of reducing OS jitter due to per-CPU
    kthreads")
    - phy.txt was added by commit ff764963479a ("drivers: phy: add generic
    PHY framework")
    - block/null_blk was added by commit 12f8f4fc0314 ("null_blk:
    documentation")
    - module-signing.txt was added by commit 3cafea307642 ("Add
    Documentation/module-signing.txt file")
    - assoc_array.txt was added by commit 3cb989501c26 ("Add a generic
    associative array implementation.")
    - arm/IXP4xx was part of the initial repo
    - arm/cluster-pm-race-avoidance.txt was added by commit 7fe31d28e839
    ("ARM: mcpm: introduce helpers for platform coherency exit/setup")
    - arm/firmware.txt was added by commit 7366b92a77fc ("ARM: Add
    interface for registering and calling firmware-specific operations")
    - arm/kernel_mode_neon.txt was added by commit 2afd0a05241d ("ARM:
    7825/1: document the use of NEON in kernel mode")
    - arm/tcm.txt was added by commit bc581770cfdd ("ARM: 5580/2: ARM TCM
    (Tightly-Coupled Memory) support v3")
    - arm/vlocks.txt was added by commit 9762f12d3e05 ("ARM: mcpm: Add
    baremetal voting mutexes")
    - blackfin/gptimers-example.c, Makefile was added by commit
    4b60779d5ea7 ("Blackfin: add an example showing how to use the
    gptimers API")
    - devicetree/usage-model.txt was added by commit 31134efc681a ("dt:
    Linux DT usage model documentation")
    - fb/api.txt was added by commit fb21c2f42879 ("fbdev: Add FOURCC-based
    format configuration API")
    - fb/sm501.txt was added by commit e6a049807105 ("video, sm501: add
    edid and commandline support")
    - fb/udlfb.txt was added by commit 96f8d864afd6 ("fbdev: move udlfb out
    of staging.")
    - filesystems/Makefile was added by commit 1e0051ae48a2
    ("Documentation/fs/: split txt and source files")
    - filesystems/nfs/nfsd-admin-interfaces.txt was added by commit
    8a4c6e19cfed ("nfsd: document kernel interfaces for nfsd
    configuration")
    - ide/warm-plug-howto.txt was added by commit f74c91413ec6 ("ide: add
    warm-plug support for IDE devices (take 2)")
    - laptops/Makefile was added by commit d49129accc21
    ("Documentation/laptop/: split txt and source files")
    - leds/leds-blinkm.txt was added by commit b54cf35a7f65 ("LEDS: add
    BlinkM RGB LED driver, documentation and update MAINTAINERS")
    - leds/ledtrig-oneshot.txt was added by commit 5e417281cde2 ("leds: add
    oneshot trigger")
    - leds/ledtrig-transient.txt was added by commit 44e1e9f8e705 ("leds:
    add new transient trigger for one shot timer activation")
    - m68k/README.buddha was part of the initial repo
    - networking/LICENSE.(qla3xxx|qlcnic|qlge) was added by commits
    40839129f779, c4e84bde1d59, 5a4faa873782
    - networking/Makefile was added by commit 3794f3e812ef ("docsrc: build
    Documentation/ sources")
    - networking/i40evf.txt was added by commit 105bf2fe6b32 ("i40evf: add
    driver to kernel build system")
    - networking/ipsec.txt was added by commit b3c6efbc36e2 ("xfrm: Add
    file to document IPsec corner case")
    - networking/mac80211-auth-assoc-deauth.txt was added by commit
    3cd7920a2be8 ("mac80211: add auth/assoc/deauth flow diagram")
    - networking/netlink_mmap.txt was added by commit 5683264c3981
    ("netlink: add documentation for memory mapped I/O")
    - networking/nf_conntrack-sysctl.txt was added by commit c9f9e0e1597f
    ("netfilter: doc: add nf_conntrack sysctl api documentation") lan)
    - networking/team.txt was added by commit 3d249d4ca7d0 ("net: introduce
    ethernet teaming device")
    - networking/vxlan.txt was added by commit d342894c5d2f ("vxlan:
    virtual extensible lan")
    - power/runtime_pm.txt was added by commit 5e928f77a09a ("PM: Introduce
    core framework for run-time PM of I/O devices (rev. 17)")
    - power/charger-manager.txt was added by commit 3bb3dbbd56ea
    ("power_supply: Add initial Charger-Manager driver")
    - RCU/lockdep-splat.txt was added by commit d7bd2d68aa2e ("rcu:
    Document interpretation of RCU-lockdep splats")
    - s390/kvm.txt was added by 5ecee4b (KVM: s390: API documentation)
    - s390/qeth.txt was added by commit b4d72c08b358 ("qeth: bridgeport
    support - basic control")
    - scheduler/sched-bwc.txt was added by commit 88ebc08ea9f7 ("sched: Add
    documentation for bandwidth control")
    - scsi/advansys.txt was added by commit 4bd6d7f35661 ("[SCSI] advansys:
    Move documentation to Documentation/scsi")
    - scsi/bfa.txt was added by commit 1ec90174bdb4 ("[SCSI] bfa: add
    readme file")
    - scsi/bnx2fc.txt was added by commit 12b8fc10eaf4 ("[SCSI] bnx2fc: Add
    driver documentation")
    - scsi/cxgb3i.txt was added by commit c3673464ebc0 ("[SCSI] cxgb3i: Add
    cxgb3i iSCSI driver.")
    - scsi/hpsa.txt was added by commit 992ebcf14f3c ("[SCSI] hpsa: Add
    hpsa.txt to Documentation/scsi")
    - scsi/link_power_management_policy.txt was added by commit
    ca77329fb713 ("[libata] Link power management infrastructure")
    - scsi/osd.txt was added by commit 78e0c621deca ("[SCSI] osd:
    Documentation for OSD library")
    - scsi/scsi-parameter.txt was created/moved by commit 163475fb111c
    ("Documentation: move SCSI parameters to their own text file")
    - serial/driver was part of the initial repo
    - serial/n_gsm.txt was added by commit 323e84122ec6 ("n_gsm: add a
    documentation")
    - timers/Makefile was added by commit 3794f3e812ef ("docsrc: build
    Documentation/ sources")
    - virt/kvm/s390.txt was added by commit d9101fca3d57 ("KVM: s390:
    diagnose call documentation")
    - vm/split_page_table_lock was added by commit 49076ec2ccaf ("mm:
    dynamically allocate page->ptl if it cannot be embedded to struct
    page")
    - w1/slaves/w1_ds28e04 was added by commit fbf7f7b4e2ae ("w1: Add
    1-wire slave device driver for DS28E04-100")
    - w1/masters/omap-hdq was added by commit e0a29382c6f5 ("hdq:
    documentation for OMAP HDQ")
    - x86/early-microcode.txt was added by commit 0d91ea86a895 ("x86, doc:
    Documentation for early microcode loading")
    - x86/earlyprintk.txt was added by commit a1aade478862 ("x86/doc:
    mini-howto for using earlyprintk=dbgp")
    - x86/entry_64.txt was added by commit 8b4777a4b50c ("x86-64: Document
    some of entry_64.S")
    - x86/pat.txt was added by commit d27554d874c7 ("x86: PAT
    documentation")

    Moved files
    - arm/kernel_user_helpers.txt was moved out of arch/arm/kernel by
    commit 37b8304642c7 ("ARM: kuser: move interface documentation out of
    the source code")
    - efi-stub.txt was moved out of x86/ and down into Documentation/ in
    commit 4172fe2f8a47 ("EFI stub documentation updates")
    - laptops/hpfall.c was moved out of hwmon/ and into laptops/ in commit
    efcfed9bad88 ("Move hp_accel to drivers/platform/x86")
    - commit 5616c23ad9cd ("x86: doc: move x86-generic documentation from
    Doc/x86/i386"):
    * x86/usb-legacy-support.txt
    * x86/boot.txt
    * x86/zero_page.txt
    - power/video_extension.txt was moved to acpi in commit 70e66e4df191
    ("ACPI / video: move video_extension.txt to Documentation/acpi")

    Removed files (left in 00-INDEX)
    - memory.txt was removed by commit 00ea8990aadf ("memory.txt: remove
    stray information")
    - gpio.txt was moved to gpio/ in commit fd8e198cfcaa ("Documentation:
    gpiolib: document new interface")
    - networking/DLINK.txt was removed by commit 168e06ae26dd
    ("drivers/net: delete old parallel port de600/de620 drivers")
    - serial/hayes-esp.txt was removed by commit f53a2ade0bb9 ("tty: esp:
    remove broken driver")
    - s390/TAPE was removed by commit 9e280f669308 ("[S390] remove tape
    block docu")
    - vm/locking was removed by commit 57ea8171d2bc ("mm: documentation:
    remove hopelessly out-of-date locking doc")
    - laptops/acer-wmi.txt was remvoed by commit 020036678e81 ("acer-wmi:
    Delete out-of-date documentation")

    Typos/misc issues
    - rpc-server-gss.txt was added as knfsd-rpcgss.txt in commit
    030d794bf498 ("SUNRPC: Use gssproxy upcall for server RPCGSS
    authentication.")
    - commit b88cf73d9278 ("net: add missing entries to
    Documentation/networking/00-INDEX")
    * generic-hdlc.txt was added as generic_hdlc.txt
    * spider_net.txt was added as spider-net.txt
    - w1/master/mxc-w1 was added as mxc_w1 by commit a5fd9139f74c ("w1: add
    1-wire master driver for i.MX27 / i.MX31")
    - s390/zfcpdump.txt was added as zfcpdump by commit 6920c12a407e
    ("[S390] Add Documentation/s390/00-INDEX.")

    Signed-off-by: Henrik Austad
    Reviewed-by: Paul E. McKenney [rcu bits]
    Acked-by: Rob Landley
    Cc: Jiri Kosina
    Cc: Thomas Gleixner
    Cc: Rob Herring
    Cc: David S. Miller
    Cc: Mark Brown
    Cc: "H. Peter Anvin"
    Cc: Ingo Molnar
    Cc: Gleb Natapov
    Cc: Linus Torvalds
    Cc: Len Brown
    Cc: James Bottomley
    Cc: Jean-Christophe Plagniol-Villard
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Henrik Austad
     

01 Jan, 2014

1 commit

  • b28bc9b38   Merge tag 'v3.13-rc6' into for-3.14/core ... Browse Code »

    Needed to bring blk-mq uptodate, since changes have been going in
    since for-3.14/core was established.

    Fixup merge issues related to the immutable biovec changes.

    Signed-off-by: Jens Axboe

    Conflicts:
    block/blk-flush.c
    fs/btrfs/check-integrity.c
    fs/btrfs/extent_io.c
    fs/btrfs/scrub.c
    fs/logfs/dev_bdev.c

    Jens Axboe
     

22 Dec, 2013

2 commits

19 Dec, 2013

1 commit

24 Nov, 2013

2 commits

  • 4550dd6c6   block: Immutable bio vecs ... Browse Code »
    5

    This adds a mechanism by which we can advance a bio by an arbitrary
    number of bytes without modifying the biovec: bio->bi_iter.bi_bvec_done
    indicates the number of bytes completed in the current bvec.

    Various driver code still needs to be updated to not refer to the bvec
    directly before we can use this for interesting things, like efficient
    bio splitting.

    Signed-off-by: Kent Overstreet
    Cc: Jens Axboe
    Cc: Lars Ellenberg
    Cc: Paul Clements
    Cc: drbd-user@lists.linbit.com
    Cc: nbd-general@lists.sourceforge.net

    Kent Overstreet
     
  • 4f024f379   block: Abstract out bvec iterator ... Browse Code »
    13

    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
     

01 Oct, 2013

1 commit

  • 080506ad0   block: change config option name for cmdline partition parsing ... Browse Code »

    Recently commit bab55417b10c ("block: support embedded device command
    line partition") introduced CONFIG_CMDLINE_PARSER. However, that name
    is too generic and sounds like it enables/disables generic kernel boot
    arg processing, when it really is block specific.

    Before this option becomes a part of a full/final release, add the BLK_
    prefix to it so that it is clear in absence of any other context that it
    is block specific.

    In addition, fix up the following less critical items:
    - help text was not really at all helpful.
    - index file for Documentation was not updated
    - add the new arg to Documentation/kernel-parameters.txt
    - clarify wording in source comments

    Signed-off-by: Paul Gortmaker
    Cc: Jens Axboe
    Cc: Cai Zhiyong
    Cc: Wei Yongjun
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Paul Gortmaker
     

12 Sep, 2013

1 commit

  • bab55417b   block: support embedded device command line partition ... Browse Code »

    Read block device partition table from command line. The partition used
    for fixed block device (eMMC) embedded device. It is no MBR, save
    storage space. Bootloader can be easily accessed by absolute address of
    data on the block device. Users can easily change the partition.

    This code reference MTD partition, source "drivers/mtd/cmdlinepart.c"
    About the partition verbose reference
    "Documentation/block/cmdline-partition.txt"

    [akpm@linux-foundation.org: fix printk text]
    [yongjun_wei@trendmicro.com.cn: fix error return code in parse_parts()]
    Signed-off-by: Cai Zhiyong
    Cc: Karel Zak
    Cc: "Wanglin (Albert)"
    Cc: Marius Groeger
    Cc: David Woodhouse
    Cc: Jens Axboe
    Cc: Brian Norris
    Cc: Artem Bityutskiy
    Signed-off-by: Wei Yongjun
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Cai Zhiyong
     

25 Jul, 2013

1 commit

28 May, 2013

1 commit

09 Apr, 2013

1 commit

10 Jan, 2013

1 commit

  • d02f7aa8d   cfq-iosched: enable full blkcg hierarchy support ... Browse Code »

    With the previous two patches, all cfqg scheduling decisions are based
    on vfraction and ready for hierarchy support. The only thing which
    keeps the behavior flat is cfqg_flat_parent() which makes vfraction
    calculation consider all non-root cfqgs children of the root cfqg.

    Replace it with cfqg_parent() which returns the real parent. This
    enables full blkcg hierarchy support for cfq-iosched. For example,
    consider the following hierarchy.

    root
    / \
    A:500 B:250
    / \
    AA:500 AB:1000

    For simplicity, let's say all the leaf nodes have active tasks and are
    on service tree. For each leaf node, vfraction would be

    AA: (500 / 1500) * (500 / 750) =~ 0.2222
    AB: (1000 / 1500) * (500 / 750) =~ 0.4444
    B: (250 / 750) =~ 0.3333

    and vdisktime will be distributed accordingly. For more detail,
    please refer to Documentation/block/cfq-iosched.txt.

    v2: cfq-iosched.txt updated to describe group scheduling as suggested
    by Vivek.

    v3: blkio-controller.txt updated.

    Signed-off-by: Tejun Heo
    Acked-by: Vivek Goyal

    Tejun Heo
     

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
     

09 Aug, 2012

3 commits

27 Jun, 2012

1 commit

  • a051661ca   blkcg: implement per-blkg request allocation ... Browse Code »

    Currently, request_queue has one request_list to allocate requests
    from regardless of blkcg of the IO being issued. When the unified
    request pool is used up, cfq proportional IO limits become meaningless
    - whoever grabs the next request being freed wins the race regardless
    of the configured weights.

    This can be easily demonstrated by creating a blkio cgroup w/ very low
    weight, put a program which can issue a lot of random direct IOs there
    and running a sequential IO from a different cgroup. As soon as the
    request pool is used up, the sequential IO bandwidth crashes.

    This patch implements per-blkg request_list. Each blkg has its own
    request_list and any IO allocates its request from the matching blkg
    making blkcgs completely isolated in terms of request allocation.

    * Root blkcg uses the request_list embedded in each request_queue,
    which was renamed to @q->root_rl from @q->rq. While making blkcg rl
    handling a bit harier, this enables avoiding most overhead for root
    blkcg.

    * Queue fullness is properly per request_list but bdi isn't blkcg
    aware yet, so congestion state currently just follows the root
    blkcg. As writeback isn't aware of blkcg yet, this works okay for
    async congestion but readahead may get the wrong signals. It's
    better than blkcg completely collapsing with shared request_list but
    needs to be improved with future changes.

    * After this change, each block cgroup gets a full request pool making
    resource consumption of each cgroup higher. This makes allowing
    non-root users to create cgroups less desirable; however, note that
    allowing non-root users to directly manage cgroups is already
    severely broken regardless of this patch - each block cgroup
    consumes kernel memory and skews IO weight (IO weights are not
    hierarchical).

    v2: queue-sysfs.txt updated and patch description udpated as suggested
    by Vivek.

    v3: blk_get_rl() wasn't checking error return from
    blkg_lookup_create() and may cause oops on lookup failure. Fix it
    by falling back to root_rl on blkg lookup failures. This problem
    was spotted by Rakesh Iyer .

    v4: Updated to accomodate 458f27a982 "block: Avoid missed wakeup in
    request waitqueue". blk_drain_queue() now wakes up waiters on all
    blkg->rl on the target queue.

    Signed-off-by: Tejun Heo
    Acked-by: Vivek Goyal
    Cc: Wu Fengguang
    Signed-off-by: Jens Axboe

    Tejun Heo
     

05 Nov, 2011

1 commit

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
     

05 Aug, 2011

1 commit

  • 4931402a9   cfq-iosched: Add documentation about idling ... Browse Code »

    There are always questions about why CFQ is idling on various conditions.
    Recent ones is Christoph asking again why to idle on REQ_NOIDLE. His
    assertion is that XFS is relying more and more on workqueues and is
    concerned that CFQ idling on IO from every workqueue will impact
    XFS badly.

    So he suggested that I add some more documentation about CFQ idling
    and that can provide more clarity on the topic and also gives an
    opprotunity to poke a hole in theory and lead to improvements.

    So here is my attempt at that. Any comments are welcome.

    Signed-off-by: Vivek Goyal
    Signed-off-by: Jens Axboe

    Vivek Goyal
     

24 Jul, 2011

1 commit

  • 5757a6d76   block: strict rq_affinity ... Browse Code »

    Some systems benefit from completions always being steered to the strict
    requester cpu rather than the looser "per-socket" steering that
    blk_cpu_to_group() attempts by default. This is because the first
    CPU in the group mask ends up being completely overloaded with work,
    while the others (including the original submitter) has power left
    to spare.

    Allow the strict mode to be set by writing '2' to the sysfs control
    file. This is identical to the scheme used for the nomerges file,
    where '2' is a more aggressive setting than just being turned on.

    echo 2 > /sys/block//queue/rq_affinity

    Cc: Christoph Hellwig
    Cc: Roland Dreier
    Tested-by: Dave Jiang
    Signed-off-by: Dan Williams
    Signed-off-by: Jens Axboe

    Dan Williams
     

31 Mar, 2011

1 commit

10 Mar, 2011

1 commit

  • 7eaceacca   block: remove per-queue plugging ... Browse Code »
    30

    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
     

11 Nov, 2010

1 commit

19 Oct, 2010

1 commit

10 Sep, 2010

1 commit

23 Aug, 2010

1 commit

05 Aug, 2010

1 commit

08 Mar, 2010

1 commit

22 Feb, 2010

1 commit

29 Jan, 2010

1 commit

  • 488991e28   block: Added in stricter no merge semantics for block I/O ... Browse Code »

    Updated 'nomerges' tunable to accept a value of '2' - indicating that _no_
    merges at all are to be attempted (not even the simple one-hit cache).

    The following table illustrates the additional benefit - 5 minute runs of
    a random I/O load were applied to a dozen devices on a 16-way x86_64 system.

    nomerges Throughput %System Improvement (tput / %sys)
    -------- ------------ ----------- -------------------------
    0 12.45 MB/sec 0.669365609
    1 12.50 MB/sec 0.641519199 0.40% / 2.71%
    2 12.52 MB/sec 0.639849750 0.56% / 2.96%

    Signed-off-by: Alan D. Brunelle
    Signed-off-by: Jens Axboe

    Alan D. Brunelle
     

03 Jan, 2010

1 commit

18 Dec, 2009

1 commit

01 Jul, 2009

1 commit

13 Jun, 2009

1 commit

02 Jun, 2009

1 commit

15 Apr, 2009

1 commit

26 Mar, 2009

1 commit

02 Feb, 2009

1 commit