From: Eric Dumazet <eric.dumazet@gmail.com>
To: Benjamin LaHaise <bcrl@lhnet.ca>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
Greg KH <greg@kroah.com>, Octavian Purdila <opurdila@ixiacom.com>,
netdev@vger.kernel.org, Cosmin Ratiu <cratiu@ixiacom.com>
Subject: Re: [PATCH 1/3] sysfs directory scaling: rbtree for dirent name lookups
Date: Tue, 03 Nov 2009 23:06:14 +0100 [thread overview]
Message-ID: <4AF0A956.5020600@gmail.com> (raw)
In-Reply-To: <20091103215650.GT8227@kvack.org>
Benjamin LaHaise a écrit :
> On Tue, Nov 03, 2009 at 01:43:43PM -0800, Eric W. Biederman wrote:
>> I guess in particular what I would expect is that if we can do 35000
>> interfaces in 63s with an O(N^2) algorithm. Then we should be able to
>> do 35000 interfaces with an O(NlogN) algorithm in under a second.
>> Which for your application should make the time essentially flat in
>> the number of interfaces.
>
> That's the wrong way to interprete the numbers. The 35000 number of 63s is
> the time that it takes 63s to add 5000 more interfaces in the 30,000 to
> 35,000 range. This includes the time required to add a point to point ip
> route on the interface and bring the interface up.
Speaking of pppol2tp, it seems /proc/net/pppol2tp is not safe,
with a strange two phases locking...
(We keep in struct pppol2tp_seq_data pointers to structures
that might have been freed between to read() syscalls)
next prev parent reply other threads:[~2009-11-03 22:06 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-01 16:31 [PATCH 1/3] sysfs directory scaling: rbtree for dirent name lookups Benjamin LaHaise
2009-11-01 16:32 ` [PATCH 2/3] sysfs directory scaling: doubly linked list for dirents Benjamin LaHaise
2009-11-01 16:33 ` [PATCH 2/3] sysfs directory scaling: count number of children dirs Benjamin LaHaise
2009-11-03 3:50 ` [PATCH 1/3] sysfs directory scaling: rbtree for dirent name lookups Greg KH
2009-11-03 6:14 ` Eric Dumazet
2009-11-03 7:01 ` [PATCH] sysctl: reduce ram usage by 40 % Eric Dumazet
2009-11-03 10:23 ` Eric W. Biederman
2009-11-03 16:07 ` [PATCH 1/3] sysfs directory scaling: rbtree for dirent name lookups Greg KH
2009-11-03 16:38 ` Octavian Purdila
2009-11-03 16:45 ` Benjamin LaHaise
2009-11-03 17:56 ` Greg KH
2009-11-03 22:28 ` Eric W. Biederman
2009-11-03 20:01 ` Benjamin LaHaise
2009-11-03 21:32 ` Eric W. Biederman
2009-11-03 21:43 ` Eric W. Biederman
2009-11-03 21:56 ` Benjamin LaHaise
2009-11-03 22:06 ` Eric Dumazet [this message]
2009-11-03 21:52 ` Benjamin LaHaise
2009-11-03 22:18 ` Eric W. Biederman
2009-11-03 10:41 ` Eric W. Biederman
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