On Mon, Oct 11, 2010 at 8:54 AM, sumeet gandhare
<[email protected]> wrote:
> Hi All,
>   Could you please let me know why Big Kernel lock is needed in some kernel
> code paths?
> Thanks
> Sumeet

I assume you know there has been a enduring movement to eliminate the
BKL in favor of more fine grained locks.

Thus the answer to your question is:

There is no need for the BKL specifically, but there is still legacy
code which has not yet been converted to a use a more fine-grained
lock approach.  Some of the BKL users such as ioctl() will be very
difficult to fix.

Greg

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