LKML Archive on
help / color / mirror / Atom feed
From: Sam Ravnborg <>
To: "Maciej W. Rozycki" <>
Cc: Franck Bui-Huu <>,
	Ralf Baechle <>,,,
	Andrew Morton <>,
Subject: Re: [PATCH] Discardable strings for init and exit sections
Date: Fri, 12 Oct 2007 19:45:07 +0200	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

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.


  parent reply	other threads:[~2007-10-12 17:43 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-10-12 16:50 Maciej W. Rozycki
2007-10-12 17:19 ` Adrian Bunk
2007-10-12 17:52   ` Ralf Baechle
2007-10-12 18:15     ` Adrian Bunk
2007-10-23 16:57       ` Maciej W. Rozycki
2007-10-23 17:12         ` Adrian Bunk
2007-10-23 17:25           ` Sam Ravnborg
2007-10-12 17:45 ` Sam Ravnborg [this message]
2007-10-23 17:23   ` Maciej W. Rozycki
2007-10-23 17:27     ` Sam Ravnborg

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \ \ \ \ \ \ \ \ \ \
    --subject='Re: [PATCH] Discardable strings for init and exit sections' \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).