Messages in this thread | | | Date | Tue, 28 Aug 2001 19:36:01 +0200 (CEST) | From | Roy Sigurd Karlsbakk <> | Subject | Re: Error 3c900 driver in 2.2.19? |
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On Tue, 28 Aug 2001, Andrew Morton wrote:
> Roy Sigurd Karlsbakk wrote: > > > > On Tue, 28 Aug 2001, Andrew Morton wrote: > > > > > Possibly, VM system changes have taken you over some threshold. > > > Are you putting a lot of traffic through that machine? > > > > There's <= 2500 messages (sendmail - usually <5 concurrently) going > > through per day, some 10.000 pop connections per day (mostly at working > > hours). The server's got some 256 megs of RAM, and is doing some small > > databases with postgresql and mysql in addition to the apache server. The > > server does not have any problems with swapping, as the text below should > > show. > > > > As far as I can see from linux/mm/swap.c, it shouldn't have anything to do > > with freepages... Am I wrong? > > > > roy > > > > [root@server log]# free > > total used free shared buffers cached > > Mem: 257876 252976 4900 64120 65156 147368 > > -/+ buffers/cache: 40452 217424 > > Swap: 136512 268 136244 > > > > Networking needs to allocate memory at interrupt time. This is > referred to as "atomic allocation". The only way in which this > can be successful is for the VM system to ensure that there is > a pool of immediately-allocatable memory lying around. > > The 2.2 kernel uses the tunables in /proc/sys/vm/freepages to > decide how large that pool should be. Machines which sustain > a high network load commonly require more memory than the > default freepages setting provides. People who encounter network > Rx allocation failures with 2.2 kernels do report that increasing > the freepages tunables fixes the problem. > > - >
Thanks
But... Should the server hang after experiencing problems with this? On 2.2.19?
ory
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