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Date: Tue, 16 Oct 2012 21:04:28 +0300 From: Pekka Enberg <penberg@...nel.org> To: Avleen Vig <avleen@...il.com> Cc: linux-kernel@...r.kernel.org, Christoph Lameter <cl@...ux.com>, David Rientjes <rientjes@...gle.com>, Andrew Morton <akpm@...ux-foundation.org> Subject: Re: Reading /proc/slabinfo causes stalls Hi Avleen, On Tue, Oct 16, 2012 at 8:51 PM, Avleen Vig <avleen@...il.com> wrote: > I *think* this is the right place to ask this, and apologies if it's not > (is there a better place?). > > We have checks which read /proc/slabinfo once a minute, and have noticed > that this causes the entire system to stall for a few milliseconds. > It's long enough that it causes noticeable delays in latency-sensitive > applications (between 10ms and 100ms). > > Is this a known condition? Are there work arounds or other ways to get the > slab allocation data which don't cause stalls? What kernel version are you using? What does your .config look like? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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