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UDP memory accounting and limitation (take 8)

From:  Hideo AOKI <haoki@redhat.com>
To:  David Miller <davem@davemloft.net>, netdev <netdev@vger.kernel.org>
Subject:  [PATCH 0/5] UDP memory accounting and limitation (take 8)
Date:  Thu, 15 Nov 2007 16:44:13 -0500
Message-ID:  <473CBDAD.1010708@redhat.com>
Cc:  Satoshi Oshima <satoshi.oshima.fk@hitachi.com>, Herbert Xu <herbert@gondor.apana.org.au>, Bill Fink <billfink@mindspring.com>, Andi Kleen <andi@firstfloor.org>, Evgeniy Polyakov <johnpol@2ka.mipt.ru>, Stephen Hemminger <shemminger@linux-foundation.org>, yoshfuji@linux-ipv6.org, Yumiko Sugita <yumiko.sugita.yf@hitachi.com>, Hideo AOKI <haoki@redhat.com>
Archive-link:  Article

Hello,

This is the latest patch set of UDP memory accounting and limitation.

I modified sk_datagram_pages() to avoid using divide instruction.

In addition, I also fixed memory accounting code in udp_recvmsg(),
since, in previous takes, the accounting code referred released
sk_buff's truesize. The fix can be found in 3rd patch of the patch set.

The patch set is for net-2.6. Please apply.


Changelog take 7 -> take 8:
 * sk_datagram_pages(): avoided using divide instruction
 * udp_recvmsg(): fixed referring released truesize in accounting

Changelog take 6 -> take 7:
 * renamed /proc/sys/net/ipv4/udp_rmem to
   /proc/sys/net/ipv4/udp_rmem_min
 * renamed /proc/sys/net/ipv4/udp_wmem to
   /proc/sys/net/ipv4/udp_wmem_min
 * rebased to net-2.6


Changelog take 5 -> take 6:

 * removed minimal limit of /proc/sys/net/ipv4/udp_mem
 * added udp_init() for default value calculation of parameters
 * added /proc/sys/net/ipv4/udp_rmem and
   /proc/sys/net/ipv4/udp_rmem
 * added limitation code to ip_ufo_append_data()
 * improved accounting for receiving packet
 * fixed typos
 * rebased to 2.6.24-rc1


Changelog take 4 -> take 5:

 * removing unnessesary EXPORT_SYMBOLs
 * adding minimal limit of /proc/sys/net/ipv4/udp_mem
 * bugfix of UDP limit affecting protocol other than UDP
 * introducing __ip_check_max_skb_pages()
 * using CTL_UNNUMBERED
 * adding udp_mem usage to Documentation/networking/ip_sysctl.txt


Best regards,
Hideo Aoki

--
Hitachi Computer Products (America) Inc.
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