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Date: Mon, 26 Mar 2012 15:26:28 -0700 From: Vivek Haldar <haldar@...gle.com> To: Andi Kleen <ak@...ux.intel.com> Cc: Andreas Dilger <adilger@...ger.ca>, tytso@....edu, linux-ext4@...r.kernel.org, tim.c.chen@...ux.intel.com Subject: Re: [RFC, PATCH] Avoid hot statistics cache line in ext4 extent cache Andi -- I realized the problem soon after the original patch, and submitted another patch to make these per cpu counters. http://patchwork.ozlabs.org/patch/124213/ However, looks like that fell through the cracks. Andreas, Ted -- could you please take a look at that patch? Andi -- perhaps you could patch it in and check if you still see the hot cache line? On Fri, Mar 23, 2012 at 8:13 PM, Andi Kleen <ak@...ux.intel.com> wrote: >> The patch only disables the statistics counting, but not the sysfs >> files that will now report bogus statistics. I don't disagree with >> disabling these stats, but if you are disabling the accounting you >> should also comment out the functions in fs/ext4/super.c that are >> printing out these statistics. > > Aware of that -- that is why it was just a RFC. > The choice is between per cpu counters or completely removing them. > I would prefer the later. > > -Andi > > -- > 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 -- Regards, Vivek -- 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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