Re: [Ext2-devel] [RFC] Adding multiple block allocation

[Suparna Bhattacharya <suparna@in.ibm.com>]

On Sat, Apr 30, 2005 at 09:40:43PM +0530, Suparna Bhattacharya wrote:
> On Fri, Apr 29, 2005 at 04:22:59PM -0700, Mingming Cao wrote:
> > On Fri, 2005-04-29 at 11:45 -0700, Badari Pulavarty wrote:
> > > I touch tested your patch earlier and seems to work fine. Lets integrate
> > > Mingming's getblocks() patches with this and see if we get any benifit
> > > from the whole effort.
> > > 
> > 
> > I tried Suparna's mpage_writepages_getblocks patch with my
> > ext3_get_blocks patch, seems to work fine,  except that still only one
> > block is allocated at a time. I got a little confused.... 
> > 
> > I did not see any delayed allocation code in your patch, I assume you
> > have to update ext3_prepare_write to not call ext3_get_block, so that
> > block allocation will be defered at ext3_writepages time. So without the
> > delayed allocation part, the get_blocks in mpage_writepages is doing
> > multiple blocks look up only, right?
> 
> That's right - so you could try it with mmapped writes (which don't
> go through a prepare write) or with Badari's patch to not call
> ext3_get_block in prepare write.

BTW, I hope you are running with NOBH.

Regards
Suparna

> 
> Regards
> Suparna
> > 
> > 
> > Mingming
> > 
> > 
> > 
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> -- 
> Suparna Bhattacharya (suparna@in.ibm.com)
> Linux Technology Center
> IBM Software Lab, India
> 
> 
> 
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-- 
Suparna Bhattacharya (suparna@in.ibm.com)
Linux Technology Center
IBM Software Lab, India

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