2008-11-11 07:43:32     pdflush

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2008-11-11 07:43:32     pdflush

Linux Newbie (INDIA)

Message: 65020   

 

Hi,

 

We are using 2007R1 distribution build for BF533 processor.

 

In our system we observe that on doing specific functinality, more number of pdflush demeons are created and at this time, our system is very slow to user response.

 

How to control pdflush deamons parameters i.e number of deamons created or its scheduling?

 

Our understanding is that pdflush demeon moves dirty pages to hard disk, but we dont have hard disk. In this case how pdflush behave?

 

Is there any documentation regarding pdflush behaviour with uClinux(BF533)?

 

Thanks in Advance

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2008-11-11 07:47:20     Re: pdflush

Mike Frysinger (UNITED STATES)

Message: 65021   

 

pdflush manages any storage system, not just hard disks.  if you're using flash, then you'll need a pdflush daemon.

 

all tunables can be found in the Documentation/ directory.

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2008-11-12 04:37:46     Re: pdflush

Linux Newbie (INDIA)

Message: 65139   

 

Hi,

pdflush manages any storage system, not just hard disks.  if you're using flash, then you'll need a pdflush daemon.

 

We do have Flash. In that case does pdflush access it? If yes, is there any pre-defined address that it has to access?

all tunables can be found in the Documentation/ directory

 

Can you please mention me the exact path. I couldnt find it.

 

 

 

Thanks in Advance

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2008-11-12 06:30:02     Re: pdflush

Mike Frysinger (UNITED STATES)

Message: 65146   

 

the pdflush daemon knows nothing about underlying technologies.  it only knows about block devices because that is how it handles them.  if you're using a root filesystem on flash, then there is no way to get rid of pdflush.  control your writing to it.

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