Hi, > Mingming Cao wrote: > percpu counter: update center counter when sum per-cpu counter > > From: Mingming cao <cmm@xxxxxxxxxx> > > Delayed allocation need to check free blocks at every write time. > percpu_counter_read_positive() is not quit accurate > but using percpu_counter_sum_positive() for every write > frequently is quite expensive. I couldn't compile the latest ext4 patch qeueu. LD fs/ext3/ext3.o LD fs/ext3/built-in.o CC fs/ext4/balloc.o fs/ext4/balloc.c: In function ‘ext4_has_free_blocks’: fs/ext4/balloc.c:1629: error: implicit declaration of function ‘percpu_counter_sum_positive_set’ > + percpu_counter_sum_positive_set(&sbi->s_freeblocks_counter); Maybe the above line which in percpucounter-add-sum-and-set-function.patch is percpu_counter_sum_and_set(&sbi->s_freeblocks_couter). Thanks, Akira Fujita -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
