Bug 11848

Summary: 2.6.28-rc1: NCQ devices connected to PMP are still dead
Product: IO/Storage Reporter: Rafael J. Wysocki (rjw)
Component: Serial ATAAssignee: Jeff Garzik (jgarzik)
Status: CLOSED CODE_FIX    
Severity: normal CC: axboe
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 2.6.28-rc1 Subsystem:
Regression: Yes Bisected commit-id:
Bug Depends on:    
Bug Blocks: 11808    
Attachments: PMP NCQ fix

Description Rafael J. Wysocki 2008-10-25 13:01:32 UTC 
Subject    : Re: 2.6.27-rc1 (2fca5c): libata: kernel cant boot
Submitter  : Petr Vandrovec <vandrove@vc.cvut.cz>
Date       : 2008-10-25 11:17
References : http://marc.info/?l=linux-kernel&m=122493470907259&w=4
Handled-By : Jens Axboe <jens.axboe@oracle.com>

This entry is being used for tracking a regression from 2.6.27.  Please don't
close it until the problem is fixed in the mainline.
Comment 1 Rafael J. Wysocki 2008-10-25 13:01:58 UTC 
Caused by:

commit 2fca5ccf97d2c28bcfce44f5b07d85e74e3cd18e
Author: Jens Axboe <jens.axboe@oracle.com>
Date:   Wed Oct 22 09:34:49 2008 +0200

    libata: switch to using block layer tagging support
Comment 2 Jens Axboe 2008-10-27 02:16:37 UTC 
Created attachment 18463 [details]
PMP NCQ fix

Please try this patch.