Messages in this thread | | | Date | Mon, 06 Jul 2009 14:21:51 -0700 | From | "H. Peter Anvin" <> | Subject | Re: devpts mounts too slowly |
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Alexey Vlasov wrote: > On Tue, Jun 09, 2009 at 05:02:59PM -0700, H. Peter Anvin wrote: > >> A quick script seems to confirm that the time starts creeping up as the >> number of mount points increase; on my Core i7 system the 10000th mount >> takes around 50 ms whereas the early instances are submillisecond, and >> the increase *seems* to be O(n log n) or thereabouts -- slightly >> superlinear but not a good fit for a power law. > > I have prepared a new machine for testing, and I don't see any slowdown > by mounting devpts. > Total mounts on it: > # wc -l /proc/mounts > 153481 /proc/mounts > # fgrep -c devpts /proc/mounts > 10231 > > On my other servers there're slowdown already by this number of: > # wc -l /proc/mounts > 49889 /proc/mounts > # fgrep -c devpts /proc/mounts > 3323 > > But the first box is totally empty, others are in use, may be this > matters? >
Do you have /selinux mounted on one of them?
-hpa
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