Messages in this thread | | | Date | Fri, 11 Jul 2014 07:55:50 -0700 (PDT) | From | Hugh Dickins <> | Subject | Re: + shmem-fix-faulting-into-a-hole-while-its-punched-take-2.patch added to -mm tree |
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On Fri, 11 Jul 2014, Sasha Levin wrote: > > There's no easy way to see whether a given task is actually holding a lock or > is just blocking on it without going through all those tasks one by one and > looking at their trace. > > I agree with you that "The call trace is very clear on it that its not", but > when you have 500 call traces you really want something better than going > through it one call trace at a time.
Points well made, and I strongly agree with Vlastimil and Sasha. There is a world of difference between a lock wanted and a lock held, and for the display of locks "held" to conceal that difference is unhelpful. It just needs one greppable word to distinguish the cases.
(Though I didn't find "The call trace is very clear on it that its not", I thought it too was telling me that the lock was already held somehow.)
Hugh
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