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    SubjectRe: [PATCH v2 0/2] bitmap_parselist: support 'all' semantics
    On Wed, Apr 21, 2021 at 10:30:08AM -0700, Paul E. McKenney wrote:
    > On Tue, Apr 20, 2021 at 08:13:24PM -0700, Yury Norov wrote:
    > > RCU code supports a special group 'all' which selects all bits in a bitmap.
    > > We have recently added 'N' extension for bitmap parse, so that '0-N' would
    > > have exactly the same meaning as 'all'. But because the 'all' is already
    > > used by RCU, it would be reasonable to support it in core bitmap code as a
    > > common and easy-readable alias for '0-N'.
    > >
    > > Moving the 'all' support to core bitmap code adds another level of
    > > flexibility for system configuration by supporting patterns. For example,
    > > every second bit in cpumask may be selected like this:
    > > isolcpus=all:1/2
    > >
    > > v2:
    > > - cleanup patch 1;
    > > - in patch 2 explain why dropping legacy comment.
    >
    > Nice!
    >
    > I have pulled this into -rcu with some minor updates, including replacing
    > the "isolcpus=all" with "rcu_nocbs=all:1/2" per Steve Rostedt's feedback.

    Thank you Paul and Steven for fixing this 'isolcpus=all'.
    'rcu_nocbs=all:1/2' would look better in the documentation.

    > Could you please check to make sure that I didn't mess anything up?

    Everything is OK. Thank you for fixing this.

    > If tests go well, this will go into -next later today or tomorrow.
    > Although I cannot prove that this will not make the upcoming merge window,
    > but Murphy insists that it will instead be the v5.14 merge window.
    >
    > Thanx, Paul
    >
    > > Yury Norov (2):
    > > bitmap_parse: support 'all' semantics
    > > rcu/tree_plugin: don't handle the case of 'all' CPU range
    > >
    > > Documentation/admin-guide/kernel-parameters.rst | 5 +++++
    > > kernel/rcu/tree_plugin.h | 9 +++------
    > > lib/bitmap.c | 9 +++++++++
    > > lib/test_bitmap.c | 7 +++++++
    > > 4 files changed, 24 insertions(+), 6 deletions(-)
    > >
    > > --
    > > 2.25.1
    > >

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