Eric Lee / smarc-fsl-linux-kernel

22 Jan, 2013

1 commit

  • b7e17a10e   fs/ufs: remove depends on CONFIG_EXPERIMENTAL ... Browse Code »

    The CONFIG_EXPERIMENTAL config item has not carried much meaning for a
    while now and is almost always enabled by default. As agreed during the
    Linux kernel summit, remove it from any "depends on" lines in Kconfigs.

    CC: Evgeniy Dushistov
    Cc: Al Viro
    Signed-off-by: Kees Cook
    Signed-off-by: Greg Kroah-Hartman

    Kees Cook
     

03 Mar, 2011

1 commit

  • 788257d61   ufs: remove the BKL ... Browse Code »

    This introduces a new per-superblock mutex in UFS to replace
    the big kernel lock. I have been careful to avoid nested
    calls to lock_ufs and to get the lock order right with
    respect to other mutexes, in particular lock_super.

    I did not make any attempt to prove that the big kernel
    lock is not needed in a particular place in the code,
    which is very possible.

    The mutex has a significant performance impact, so it is only
    used on SMP or PREEMPT configurations.

    As Nick Piggin noticed, any allocation inside of the lock
    may end up deadlocking when we get to ufs_getfrag_block
    in the reclaim task, so we now use GFP_NOFS.

    Signed-off-by: Arnd Bergmann
    Tested-by: Nick Bowler
    Cc: Evgeniy Dushistov
    Cc: Nick Piggin

    Arnd Bergmann
     

21 Oct, 2010

1 commit

  • 6de5bd128   BKL: introduce CONFIG_BKL. ... Browse Code »

    With all the patches we have queued in the BKL removal tree, only a
    few dozen modules are left that actually rely on the BKL, and even
    there are lots of low-hanging fruit. We need to decide what to do
    about them, this patch illustrates one of the options:

    Every user of the BKL is marked as 'depends on BKL' in Kconfig,
    and the CONFIG_BKL becomes a user-visible option. If it gets
    disabled, no BKL using module can be built any more and the BKL
    code itself is compiled out.

    The one exception is file locking, which is practically always
    enabled and does a 'select BKL' instead. This effectively forces
    CONFIG_BKL to be enabled until we have solved the fs/lockd
    mess and can apply the patch that removes the BKL from fs/locks.c.

    Signed-off-by: Arnd Bergmann

    Arnd Bergmann
     

22 Jan, 2009

1 commit