memory reclaiming problem in 2.4.2

memory reclaiming problem in 2.4.2

[Sanjay Kumar]

Hi,

We are running applications on linux2.4.2 on our embedded box; Linux is being
given around 8.25 MB of memory. At run time we are trying to get 
free memory by killing some of the applications. But even after killing the 
process, the free memory is not getting freed completely, instead it is getting 
locked in form of inactive dirty pages and cache.

Following is the dump of meminfo:
# cat /proc/meminfo
        total:    used:    free:  shared: buffers:  cached:
Mem:   6447104  4931584  1515520        0    40960  2486272
Swap:        0        0        0
MemTotal:         6296 kB
MemFree:          1480 kB
MemShared:           0 kB
Buffers:            40 kB
Cached:           2428 kB
Active:           1696 kB
Inact_dirty:       504 kB
Inact_clean:       268 kB
Inact_target:        0 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:         6296 kB
LowFree:          1480 kB
SwapTotal:           0 kB
SwapFree:            0 kB


>From user space we need to allocate a huge memory space of 3.5 MB; however
allocation more than 2.5 MB fails.

We wanted to know is there is some way to reclaim these dirty pages?
There is a page laundering patch by Rik for 2.4.6; will this be useful for us?

Thanks and Regards,
Sanjay

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Re: memory reclaiming problem in 2.4.2

[Arjan van de Ven]

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On Thu, 2002-10-10 at 18:22, Sanjay Kumar wrote:
> Hi,
> 
> We are running applications on linux2.4.2 on our embedded box; Linux is being

2.4.2? I think you need to go to linux-archeology mailinglist for
that... 2.4.2 corrupts data and has shitloads of other problems...


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Re: memory reclaiming problem in 2.4.2

[Sanjay Kumar]

Hi Arjan,

So if we move to linux 2.4.17, this problem will get solved?
Please reply me as we are now planning to use 2.4.17 but still in
dilemma becuase 2.4.2 is working fine except few memory and jffs2 related 
problems.

Thanks & Regards,
Sanjay
--- Arjan van de Ven <arjanv@redhat.com> wrote:
> On Thu, 2002-10-10 at 18:22, Sanjay Kumar wrote:
> > Hi,
> > 
> > We are running applications on linux2.4.2 on our embedded box; Linux is being
> 
> 2.4.2? I think you need to go to linux-archeology mailinglist for
> that... 2.4.2 corrupts data and has shitloads of other problems...
> 
> 

> ATTACHMENT part 2 application/pgp-signature name=signature.asc



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Re: memory reclaiming problem in 2.4.2

[Arjan van de Ven]

On Thu, Oct 10, 2002 at 11:01:38PM -0700, Sanjay Kumar wrote:
> Hi Arjan,
> 
> So if we move to linux 2.4.17, this problem will get solved?
> Please reply me as we are now planning to use 2.4.17 but still in
> dilemma becuase 2.4.2 is working fine except few memory and jffs2 related 
> problems.

2.4.17 is also not a good kernel; you need 2.4.18 as minimum.....

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