On Saturday 10 March 2007 08:57, Willy Tarreau wrote: > On Fri, Mar 09, 2007 at 03:39:59PM -0600, Matt Mackall wrote: > > On Sat, Mar 10, 2007 at 08:19:18AM +1100, Con Kolivas wrote: > > > On Saturday 10 March 2007 08:07, Con Kolivas wrote: > > > > On Saturday 10 March 2007 07:46, Matt Mackall wrote: > > > > > My suspicion is the problem lies in giving too much quanta to > > > > > newly-started processes. > > > > > > > > Ah that's some nice detective work there. Mainline does some rather > > > > complex accounting on sched_fork including (possibly) a whole timer > > > > tick which rsdl does not do. make forks off continuously so what you > > > > say may well be correct. I'll see if I can try to revert to the > > > > mainline behaviour in sched_fork (which was obviously there for a > > > > reason). > > > > > > Wow! Thanks Matt. You've found a real bug too. This seems to fix the > > > qemu misbehaviour and bitmap errors so far too! Now can you please try > > > this to see if it fixes your problem? > > > > Sorry, it's about the same. I now suspect an accounting glitch involving > > pipe wake-ups. > > > > 5x memload: good > > 5x execload: good > > 5x forkload: good > > 5 parallel makes: mostly good > > make -j 5: bad > > > > So what's different between makes in parallel and make -j 5? Make's > > job server uses pipe I/O to control how many jobs are running. > > Matt, could you check with plain 2.6.20 + Con's patch ? It is possible > that he added bugs when porting to -mm, or that someting in -mm causes > the trouble. Your experience with -mm seems so much different from mine > with mainline, there must be a difference somewhere !
Good idea. > Con, is your patch necessary for mainline patch too ? I see that it > should apply, but sometimes -mm may justify changes. Yes it will be necessary for the mainline patch too. > Best regards, > Willy -- -ck - 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/
