Bug 5426

Summary:	Unnecessary memory allocation for CreateField should be eliminated
Product:	ACPI	Reporter:	Valery A Podrezov (Valery.A.Podrezov)
Component:	ACPICA-Core	Assignee:	Valery A Podrezov (Valery.A.Podrezov)
Status:	CLOSED PATCH_ALREADY_AVAILABLE
Severity:	normal	CC:	acpi-bugzilla
Priority:	P2
Hardware:	i386
OS:	Linux
Kernel Version:	2.6	Subsystem:
Regression:	---	Bisected commit-id:
Attachments:	ASL code applying CreateField operator. Bug-fixing patch

Description Valery A Podrezov 2005-10-12 10:31:48 UTC

Most recent kernel where this bug did not occur:
Distribution:
Hardware Environment:
Software Environment:
Problem Description:

The "memory leak" bug.
The issue has been revealed by PMEMCV, is not seen by OAS (see bug 5422).
Investigation shows that the Linux kernel ACPI interpreter
allocates Result-structure for processing CreateField() ASL
operator, but doesn't use it anyhow. Unnecessary memory
allocation should be eliminated.

Steps to reproduce:

Doesn't require.

Comment 1 Valery A Podrezov 2005-10-12 10:33:06 UTC

Created attachment 6290 [details]
ASL code applying CreateField operator.

The attached demo program applies in different manner
the CreateField operator.

INTERNAL BUG NUMBER

   165

Comment 2 Valery A Podrezov 2005-12-02 04:52:03 UTC

Created attachment 6749 [details]
Bug-fixing patch

The update was tested by the ASLTS test suite runs
(all the test cases) on the following systems:
- CYGWIN_NT-5.1 1.5.18(0.132/4/2) 2005-07-02 20:30 i686 unknown unknown Cygwin
- Linux 2.6.5-7.191-smp #1 SMP Tue Jun 28 14:58:56 UTC 2005 i686 i686 i386
GNU/Linux
for the following (all) modes supported by the ASLTS test suite:
- 32-bit norm mode
- 64-bit norm mode
- 32-bit slack mode
- 32-bit slack mode

The tests were run (on the systems described above) before update,
then the tests were run on those systems after update. Then results
of two runs were compared. All is Ok (no new errors).

Comment 3 Robert Moore 2006-05-18 14:23:02 UTC

This was integrated in ACPICA version 20060113

Comment 4 Robert Moore 2006-07-07 13:51:12 UTC

Integrated generic fix for all CreateXxxxField operators in ACPICA version 
20060707

Comment 5 Len Brown 2006-07-25 09:57:13 UTC

ACPICA 20060707 shipped in Linux-2.6.18-rc2

closed.