Messages in this thread |  | | | Date | Fri, 12 Oct 2007 19:45:07 +0200 | | From | Sam Ravnborg <> | | Subject | Re: [PATCH] Discardable strings for init and exit sections |
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.
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