I have a question regarding the priority of the md_thread() function (defined in md.c). I have seen that the priority of this thread is set to -20 (parameter current->nice), which means that this thread takes the highest priority. The problem I have is that this thread blocks some other task that is answering keep alive network pings from another (sibling) node. Because the keep alive answers are blocked the other node decides to take-over the RAID. This situation leeds to the fact that two nodes try to start the RAID. MD don't like this. The RAID is considered to be faulty and both nodes try to repair it, that is a problem. I figuered out that the cause of this problem is the high priority of the md_thread() function. I feel tempted to decrease this priority, but I feel some upcoming ache in my belly because I don't know the exact reason why the priority had been set to -20. I hope that somebody can explain me why! The comments in the sources seem to regard to RAID-5 personality. If so that would be no problem, I intend only to use RAID-1. Thanks in advance, Kay ###################################################### # Kay Potthoff Senior Software Engineer # # FORCE Computers GmbH Tel.: +49-89-60814-356 # Prof.-Messerschmitt-Str. 1 FAX : +49-89-6097793 # 85579 Neubiberg/München # Deutschland/Germany # # mailto:Kay.Potthoff@force.de ###################################################### - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
