So the 1-2 threads case is the standard case on a small system, isn't it? This may well cause regressions.
> In the extremely unlikely case that all the queue node entries are > used up, the current code will fall back to busy spinning without > waiting in a queue with warning message. Traditionally we had some code which could take thousands of locks in rare cases (e.g. all locks in a hash table or all locks of a big reader lock) The biggest offender was the mm for changing mmu notifiers, but I believe that's a mutex now. lglocks presumably still can do it on large enough systems. I wouldn't be surprised if there is other code which e.g. make take all locks in a table. I don't think the warning is valid and will likely trigger in some obscure cases. -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
