Messages in this thread | | | Date | Mon, 29 Oct 2007 10:15:19 +0100 (CET) | From | Jiri Kosina <> | Subject | Re: [RFC, PATCH] locks: remove posix deadlock detection |
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On Sun, 28 Oct 2007, J. Bruce Fields wrote:
> But, OK, if we can identify unshared current->files at the time we put a > task to sleep, then a slight modification of our current algorithm might > be sufficient to detect any deadlock that involves purely posix file > locks and processes. And we can tell people that avoiding deadlock is > their problem as soon as any task with a shared current->files is > involved. (Ditto, I assume, if nfsd/lockd acquires a lock.)
Don't forget that comparing file_lock->fl_owner (i.e. current->files) is not the only way how lock ownership could be computed (there could be specific file_lock->fl_lmops->fl_compare_owner() and all of them should be teached this new semantics, right?).
-- Jiri Kosina - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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