1. 06 Mar, 2012 1 commit
    • Tejun Heo's avatar
      blkcg: make CONFIG_BLK_CGROUP bool · 32e380ae
      Tejun Heo authored
      Block cgroup core can be built as module; however, it isn't too useful
      as blk-throttle can only be built-in and cfq-iosched is usually the
      default built-in scheduler.  Scheduled blkcg cleanup requires calling
      into blkcg from block core.  To simplify that, disallow building blkcg
      as module by making CONFIG_BLK_CGROUP bool.
      
      If building blkcg core as module really matters, which I doubt, we can
      revisit it after blkcg API cleanup.
      
      -v2: Vivek pointed out that IOSCHED_CFQ was incorrectly updated to
           depend on BLK_CGROUP.  Fixed.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Cc: Vivek Goyal <vgoyal@redhat.com>
      Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
      32e380ae
  2. 26 Apr, 2010 1 commit
    • Vivek Goyal's avatar
      blk-cgroup: config options re-arrangement · afc24d49
      Vivek Goyal authored
      This patch fixes few usability and configurability issues.
      
      o All the cgroup based controller options are configurable from
        "Genral Setup/Control Group Support/" menu. blkio is the only exception.
        Hence make this option visible in above menu and make it configurable from
        there to bring it inline with rest of the cgroup based controllers.
      
      o Get rid of CONFIG_DEBUG_CFQ_IOSCHED.
      
        This option currently does two things.
      
        - Enable printing of cgroup paths in blktrace
        - Enables CONFIG_DEBUG_BLK_CGROUP, which in turn displays additional stat
          files in cgroup.
      
        If we are using group scheduling, blktrace data is of not really much use
        if cgroup information is not present. To get this data, currently one has to
        also enable CONFIG_DEBUG_CFQ_IOSCHED, which in turn brings the overhead of
        all the additional debug stat files which is not desired.
      
        Hence, this patch moves printing of cgroup paths under
        CONFIG_CFQ_GROUP_IOSCHED.
      
        This allows us to get rid of CONFIG_DEBUG_CFQ_IOSCHED completely. Now all
        the debug stat files are controlled only by CONFIG_DEBUG_BLK_CGROUP which
        can be enabled through config menu.
      Signed-off-by: default avatarVivek Goyal <vgoyal@redhat.com>
      Acked-by: default avatarDivyesh Shah <dpshah@google.com>
      Reviewed-by: default avatarGui Jianfeng <guijianfeng@cn.fujitsu.com>
      Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
      afc24d49
  3. 12 Mar, 2010 1 commit
    • Ben Blum's avatar
      cgroups: blkio subsystem as module · 67523c48
      Ben Blum authored
      Modify the Block I/O cgroup subsystem to be able to be built as a module.
      As the CFQ disk scheduler optionally depends on blk-cgroup, config options
      in block/Kconfig, block/Kconfig.iosched, and block/blk-cgroup.h are
      enhanced to support the new module dependency.
      Signed-off-by: default avatarBen Blum <bblum@andrew.cmu.edu>
      Cc: Li Zefan <lizf@cn.fujitsu.com>
      Cc: Paul Menage <menage@google.com>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
      Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
      Cc: Vivek Goyal <vgoyal@redhat.com>
      Cc: Jens Axboe <jens.axboe@oracle.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      67523c48
  4. 04 Dec, 2009 2 commits
  5. 03 Dec, 2009 3 commits
  6. 03 Oct, 2009 2 commits
  7. 17 Feb, 2007 1 commit
  8. 30 Sep, 2006 1 commit
    • David Howells's avatar
      [PATCH] BLOCK: Make it possible to disable the block layer [try #6] · 9361401e
      David Howells authored
      Make it possible to disable the block layer.  Not all embedded devices require
      it, some can make do with just JFFS2, NFS, ramfs, etc - none of which require
      the block layer to be present.
      
      This patch does the following:
      
       (*) Introduces CONFIG_BLOCK to disable the block layer, buffering and blockdev
           support.
      
       (*) Adds dependencies on CONFIG_BLOCK to any configuration item that controls
           an item that uses the block layer.  This includes:
      
           (*) Block I/O tracing.
      
           (*) Disk partition code.
      
           (*) All filesystems that are block based, eg: Ext3, ReiserFS, ISOFS.
      
           (*) The SCSI layer.  As far as I can tell, even SCSI chardevs use the
           	 block layer to do scheduling.  Some drivers that use SCSI facilities -
           	 such as USB storage - end up disabled indirectly from this.
      
           (*) Various block-based device drivers, such as IDE and the old CDROM
           	 drivers.
      
           (*) MTD blockdev handling and FTL.
      
           (*) JFFS - which uses set_bdev_super(), something it could avoid doing by
           	 taking a leaf out of JFFS2's book.
      
       (*) Makes most of the contents of linux/blkdev.h, linux/buffer_head.h and
           linux/elevator.h contingent on CONFIG_BLOCK being set.  sector_div() is,
           however, still used in places, and so is still available.
      
       (*) Also made contingent are the contents of linux/mpage.h, linux/genhd.h and
           parts of linux/fs.h.
      
       (*) Makes a number of files in fs/ contingent on CONFIG_BLOCK.
      
       (*) Makes mm/bounce.c (bounce buffering) contingent on CONFIG_BLOCK.
      
       (*) set_page_dirty() doesn't call __set_page_dirty_buffers() if CONFIG_BLOCK
           is not enabled.
      
       (*) fs/no-block.c is created to hold out-of-line stubs and things that are
           required when CONFIG_BLOCK is not set:
      
           (*) Default blockdev file operations (to give error ENODEV on opening).
      
       (*) Makes some /proc changes:
      
           (*) /proc/devices does not list any blockdevs.
      
           (*) /proc/diskstats and /proc/partitions are contingent on CONFIG_BLOCK.
      
       (*) Makes some compat ioctl handling contingent on CONFIG_BLOCK.
      
       (*) If CONFIG_BLOCK is not defined, makes sys_quotactl() return -ENODEV if
           given command other than Q_SYNC or if a special device is specified.
      
       (*) In init/do_mounts.c, no reference is made to the blockdev routines if
           CONFIG_BLOCK is not defined.  This does not prohibit NFS roots or JFFS2.
      
       (*) The bdflush, ioprio_set and ioprio_get syscalls can now be absent (return
           error ENOSYS by way of cond_syscall if so).
      
       (*) The seclvl_bd_claim() and seclvl_bd_release() security calls do nothing if
           CONFIG_BLOCK is not set, since they can't then happen.
      Signed-Off-By: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
      9361401e
  9. 23 Jun, 2006 1 commit
  10. 04 Nov, 2005 2 commits
  11. 31 Oct, 2005 1 commit
  12. 16 Apr, 2005 1 commit
    • Linus Torvalds's avatar
      Linux-2.6.12-rc2 · 1da177e4
      Linus Torvalds authored
      Initial git repository build. I'm not bothering with the full history,
      even though we have it. We can create a separate "historical" git
      archive of that later if we want to, and in the meantime it's about
      3.2GB when imported into git - space that would just make the early
      git days unnecessarily complicated, when we don't have a lot of good
      infrastructure for it.
      
      Let it rip!
      1da177e4