On 09/15/2011 03:24 PM, Seth Jennings wrote:

On 09/15/2011 12:29 PM, Dan Magenheimer wrote:

quoted

quoted

From: Seth Jennings [mailto:sjenning@linux.vnet.ibm.com]
Subject: Re: [PATCH v2 0/3] staging: zcache: xcfmalloc support

quoted

Seth, I am still not clear why it is not possible to support
either allocation algorithm, selectable at runtime.  Or even
dynamically... use xvmalloc to store well-compressible pages
and xcfmalloc for poorly-compressible pages.  I understand
it might require some additional coding, perhaps even an
ugly hack or two, but it seems possible.

But why do an ugly hack if we can just use a single allocator
that has the best overall performance for the allocation range
the zcache requires.  Why make it more complicated that it
needs to be?

quoted

I agree with Seth here: a mix of different allocators for the (small)
range of sizes which zcache requires, looks like a bad idea to me.
Maintaining two allocators is a pain and this will also complicate
future plans like compaction etc.

Thanks,
Nitin

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