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    SubjectRe: [PATCH] remove no longer use of pdflush interface
    On Mon, Jun 4, 2012 at 9:53 PM, Fengguang Wu <> wrote:
    > Hi Wanpeng,
    > On Mon, Jun 04, 2012 at 08:40:42PM +0800, Wanpeng Li wrote:
    >> From: Wanpeng Li <>
    >> remove no longer use of pdflush interface nr_pdflush_threads.
    > The patch looks good in itself: the nr_pdflush_threads takes no effect
    > for many of the recent kernels. But what's the normal process of
    > interface removal?  Shall we carry some warning printk for some time
    > first or whatever?

    Yes. you have to add printk warning for noticing it deprecated.
    And add descriptoin in Documentation/ABI/obsolete/ and

    I don't know how long we maintain it. Is there any rule for it?
    Maybe 1-year is suitable, IMHO.

    Kind regards,
    Minchan Kim
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