On Fri, Oct 12, 2007 at 05:50:01PM +0100, Maciej W. Rozycki wrote:
> We currently have infrastructure for discardable text and data, but no
> such thing for strings. This is especially notable for inline strings
> such as ones used by printk() which are left behind resident in the memory
> throughout the life of the system even though code referring to them has
> been removed.
What is the actual benefit here expressed in real numbers?
For the __init/__exit notation that is yet only partially correct
we often see corner cases where one ask if it is really worth it.
Adding the discard functionality for strings seems like a logical extension
but there is a benefit/pain ratio to consider.
So real numbers please.
A few general notes to the patch.
1) We want to consolidate this in include/asm-generic/vmlinux*
somehow and this should be doen as a separate step.
2) If we introduce discardable strings then we shall in parallel
add build time checks so we catch strings marked as discardable
which is used outside a discardable compatible function.
Sam
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