From: "Randy.Dunlap" <randy.dunlap@verizon.net>
To: aia21@cantab.net, linux-kernel@vger.kernel.org,
linux-ntfs-dev@lists.sourceforge.net
Subject: [PATCH] reduce large stack usage
Date: Fri, 28 Feb 2003 23:06:23 -0800 [thread overview]
Message-ID: <3E605BEF.89DB801F@verizon.net> (raw)
[-- Attachment #1: Type: text/plain, Size: 279 bytes --]
Hi,
This patch to 2.5.63 reduces stack usage in generate_default_upcase()
from 0x3d4 bytes to just noise (on x86).
The arrays are static so they are still private (hidden), but
now they aren't allocated on the stack and copied there for
temp use.
Please apply.
Thanks,
~Randy
[-- Attachment #2: ntfs_stack_2563.patch --]
[-- Type: text/plain, Size: 1843 bytes --]
patch_name: ntfs_stack_2563.patch
patch_version: 2003-02-28.22:42:57
author: Randy.Dunlap <rddunlap@osdl.org>
description: ntfs: reduce function local stack usage from 0x3d4 bytes to just noise;
product: Linux
product_versions: linux-2563
changelog: _
URL: _
requires: _
conflicts: _
maintainer: Anton Altaparmakov <aia21@cantab.net>
diffstat: =
fs/ntfs/upcase.c | 10 +++++-----
1 files changed, 5 insertions(+), 5 deletions(-)
diff -Naur ./fs/ntfs/upcase.c%NTSTK ./fs/ntfs/upcase.c
--- ./fs/ntfs/upcase.c%NTSTK Mon Feb 24 11:05:05 2003
+++ ./fs/ntfs/upcase.c Fri Feb 28 22:37:32 2003
@@ -26,9 +26,7 @@
#include "ntfs.h"
-uchar_t *generate_default_upcase(void)
-{
- const int uc_run_table[][3] = { /* Start, End, Add */
+static const int uc_run_table[][3] = { /* Start, End, Add */
{0x0061, 0x007B, -32}, {0x0451, 0x045D, -80}, {0x1F70, 0x1F72, 74},
{0x00E0, 0x00F7, -32}, {0x045E, 0x0460, -80}, {0x1F72, 0x1F76, 86},
{0x00F8, 0x00FF, -32}, {0x0561, 0x0587, -48}, {0x1F76, 0x1F78, 100},
@@ -45,7 +43,7 @@
{0}
};
- const int uc_dup_table[][2] = { /* Start, End */
+static const int uc_dup_table[][2] = { /* Start, End */
{0x0100, 0x012F}, {0x01A0, 0x01A6}, {0x03E2, 0x03EF}, {0x04CB, 0x04CC},
{0x0132, 0x0137}, {0x01B3, 0x01B7}, {0x0460, 0x0481}, {0x04D0, 0x04EB},
{0x0139, 0x0149}, {0x01CD, 0x01DD}, {0x0490, 0x04BF}, {0x04EE, 0x04F5},
@@ -55,7 +53,7 @@
{0}
};
- const int uc_word_table[][2] = { /* Offset, Value */
+static const int uc_word_table[][2] = { /* Offset, Value */
{0x00FF, 0x0178}, {0x01AD, 0x01AC}, {0x01F3, 0x01F1}, {0x0269, 0x0196},
{0x0183, 0x0182}, {0x01B0, 0x01AF}, {0x0253, 0x0181}, {0x026F, 0x019C},
{0x0185, 0x0184}, {0x01B9, 0x01B8}, {0x0254, 0x0186}, {0x0272, 0x019D},
@@ -67,6 +65,8 @@
{0}
};
+uchar_t *generate_default_upcase(void)
+{
int i, r;
uchar_t *uc;
next reply other threads:[~2003-03-01 6:58 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-01 7:06 Randy.Dunlap [this message]
2003-03-01 9:44 ` [Linux-NTFS-Dev] [PATCH] reduce large stack usage Andrew Clausen
2003-03-01 17:42 ` Randy.Dunlap
[not found] <20030301071007$18ea@gated-at.bofh.it>
2003-03-02 14:11 ` Arnd Bergmann
2003-03-02 15:38 ` Anders Gustafsson
2003-03-02 17:14 ` Arnd Bergmann
-- strict thread matches above, loose matches on Subject: below --
2003-03-02 15:26 Manfred Spraul
2003-03-02 17:07 ` Arnd Bergmann
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:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=3E605BEF.89DB801F@verizon.net \
--to=randy.dunlap@verizon.net \
--cc=aia21@cantab.net \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-ntfs-dev@lists.sourceforge.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox