When running reaim7 on a 12-way IA64 on an ext2 filesystem on a ram disc, I see very heavy contention on inode_lock.
lockstat output shows: SPINLOCKS HOLD WAIT UTIL CON MEAN( MAX ) MEAN( MAX )(% CPU) TOTAL NOWAIT SPIN RJECT NAME 46.8% 52.4% 1.9us( 130us) 20us(8073us)(21.5%) 5072151 47.6% 52.4% 0% inode_lock 15.9% 59.5% 3.8us( 61us) 18us(7067us)( 3.9%) 852983 40.5% 59.5% 0% __sync_single_inode+0xf0 9.2% 59.0% 1.2us( 25us) 20us(8073us)( 7.8%) 1596487 41.0% 59.0% 0% generic_osync_inode+0xe0 (etc). Is anyone else seeing this on more realistic workloads? -- Dr Peter Chubb http://www.gelato.unsw.edu.au peterc AT gelato.unsw.edu.au The technical we do immediately, the political takes *forever* - 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/
