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    SubjectRe: [PATCH 2/6: v4] lockdep: Make MAX_STACK_TRACE_ENTRIES configurable.


    On Wed, 16 Jun 2010, Peter Zijlstra wrote:

    > On Wed, 2010-06-16 at 22:37 +0200, John Kacur wrote:
    > >
    > > On Wed, 16 Jun 2010, Peter Zijlstra wrote:
    > >
    > > > On Tue, 2010-06-15 at 00:21 +0200, John Kacur wrote:
    > > > > Certain debug configurations that have LOCKDEP turned on, run into the limit
    > > > > where the MAX_STACK_TRACE_ENTRIES are too small. Rather than simply turning
    > > > > off the locking correctness validator, let the user configure this value
    > > > > to something reasonable for their system.
    > > > >
    > > > > This patch was generated against 2.6.33.5-rt23 but is also intended to be
    > > > > picked-up for mainline.
    > > >
    > > > NACK
    > > >
    > > > patches like 4726f2a617ebd868a4fdeb5679613b897e5f1676 are the way to go.
    > >
    > > I've been testing 4726f2a617ebd868a4fdeb5679613b897e5f1676 in rt
    > > (Thomas has it in tip/rt/2.6.33 now) and so far it is doing the trick for
    > > me, at least on my laptop. I still need to test it on larger machines.
    > > However, this problem seems to continuably come up, and I'm not the only
    > > one who has expessed the wish / need to have this tunable.
    >
    > And simply increasing the number without thought is the worst approach
    > ever and I'm simply not going to merge it.
    >
    > Also, google doesn't seem to index msg-ids, so I've no idea what you're
    > referring to.
    > --

    The first mail in which Gregory also expressed desire to make this tunable
    is here
    http://lkml.org/lkml/2010/4/21/123

    The second in which Sven said in certain configurations they might even
    tune it down (decrease) is here.
    http://lkml.org/lkml/2010/4/21/183


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