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Date: Mon, 02 Jun 2008 11:45:12 +0900 From: Akira Fujita <a-fujita@...jp.nec.com> To: Mingming Cao <cmm@...ibm.com> CC: linux-ext4@...r.kernel.org Subject: Re: [RFC][PATCH 6/6] delalloc ENOSPC: improve percpu counter accounting accurate Mingming Cao wrote: > On Mon, 2008-06-02 at 09:19 +0900, Akira Fujita wrote: >> Hi, >> >>> Mingming Cao wrote: >>> percpu counter: update center counter when sum per-cpu counter >>> >>> From: Mingming cao <cmm@...ibm.com> >>> >>> 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). >> > > oops. Updated patch queue, please check again. I confirmed that I could compile the latest ext4 patch queue correctly. Thanks. :-) Regards, Akira Fujita -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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