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Message-Id: <1212373825.4368.74.camel@localhost.localdomain> Date: Sun, 01 Jun 2008 19:30:25 -0700 From: Mingming Cao <cmm@...ibm.com> To: Akira Fujita <a-fujita@...jp.nec.com> Cc: linux-ext4@...r.kernel.org Subject: Re: [RFC][PATCH 6/6] delalloc ENOSPC: improve percpu counter accounting accurate 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. Mingming > Thanks, > 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 -- 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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