Bug 13897

Summary: PAT wc & vmap mapping count issue
Product: Platform Specific/Hardware Reporter: Rafael J. Wysocki (rjw)
Component: x86-64Assignee: platform_x86_64 (platform_x86_64)
Status: CLOSED CODE_FIX    
Severity: normal    
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 2.6.30 Subsystem:
Regression: Yes Bisected commit-id:
Bug Depends on:    
Bug Blocks: 13070    

Description Rafael J. Wysocki 2009-08-02 21:09:30 UTC 
Subject    : PAT wc & vmap mapping count issue ?
Submitter  : Jerome Glisse <glisse@freedesktop.org>
Date       : 2009-07-30 13:11
References : http://marc.info/?l=linux-kernel&m=124895237114605&w=4
Handled-By : "Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>
Patch      : http://patchwork.kernel.org/patch/38436/

This entry is being used for tracking a regression from 2.6.29.  Please don't
close it until the problem is fixed in the mainline.

Caused by:

commit 3869c4aa18835c8c61b44bd0f3ace36e9d3b5bd0
Author: venkatesh.pallipadi@intel.com <venkatesh.pallipadi@intel.com>
Date:   Thu Apr 9 14:26:50 2009 -0700

    x86, PAT: Changing memtype to WC ensuring no WB alias

    Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
    Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
    Signed-off-by: Ingo Molnar <mingo@elte.hu>

First-Bad-Commit : 3869c4aa18835c8c61b44bd0f3ace36e9d3b5bd0
Comment 1 Rafael J. Wysocki 2009-08-09 23:42:58 UTC 
Fixed by commit bdc6340f4eb68295b1e7c0ade2356b56dca93d93 .