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Date: Fri, 26 Aug 2011 10:39:43 +0200 From: Eric Dumazet <eric.dumazet@...il.com> To: Anton Blanchard <anton@...ba.org> Cc: tytso@....edu, adilger.kernel@...ger.ca, tj@...nel.org, linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH 2/2] percpu_counter: Put a reasonable upper bound on percpu_counter_batch Le vendredi 26 août 2011 à 07:29 +1000, Anton Blanchard a écrit : > +/* > + * We set the batch at 2 * num_online_cpus(), with a minimum of 32 and > + * a maximum of 1024. > + */ > static void compute_batch_value(void) > { > int nr = num_online_cpus(); > > - percpu_counter_batch = max(32, nr*2); > + percpu_counter_batch = min(1024, max(32, nr*2)); > } > > static int __cpuinit percpu_counter_hotcpu_callback(struct notifier_block *nb, Or use the following : percpu_counter_batch = clamp(nr*2, 32, 1024); -- 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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