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Date: Wed, 25 Jun 2014 15:52:30 -0700 (PDT) From: David Rientjes <rientjes@...gle.com> To: Stefan Bader <stefan.bader@...onical.com> cc: Heiko Carstens <heiko.carstens@...ibm.com>, linux-kernel@...r.kernel.org, Eric Dumazet <eric.dumazet@...il.com>, Andrew Morton <akpm@...ux-foundation.org>, Peter Zijlstra <a.p.zijlstra@...llo.nl> Subject: Re: fs/stat: Reduce memory requirements for stat_open On Wed, 25 Jun 2014, Stefan Bader wrote: > Heiko and I both had the same issue. Since some x86 hardware also reaches a lot > of CPUs (hyperthreads included), we bumped the possible number of CPUs to 256 at > least for the 64bit kernel. And that resulted in failed accesses to /proc/stat > when memory became fragmented. > So the first patch will avoid this on most systems. I have not seen this myself, > but I would expect him to be happy with 1/2 already. For really excessive > hardware 2/2 will close the gap. > Since this is no critical bug, I am fine with 3.17, too. I have not done so, > yet, but I could let our reporter try the patches (again, probably not verifying > the second part). Just waited to do so to see whether the code settles down to > these changes. > Ok, thanks. Looks like proc-stat-convert-to-single_open_size.patch fs-seq_file-fallback-to-vmalloc-allocation.patch are destined for 3.17. -- 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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