Bug 594868 - mvsas driver needs updating
Summary: mvsas driver needs updating
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel
Version: 5.5
Hardware: All
OS: Linux
low
medium
Target Milestone: rc
: ---
Assignee: Rob Evers
QA Contact: Red Hat Kernel QE team
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-05-21 20:01 UTC by lindahl
Modified: 2010-12-23 00:32 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2010-07-22 15:09:55 UTC
Target Upstream Version:


Attachments (Terms of Use)

Description lindahl 2010-05-21 20:01:29 UTC
The 5.5 kernel includes a mvsas driver backported from 2.6.25, so I hear.

In 2.6.31, Marvell contributed a new driver. It has novel features like error handling.

On my cluster of 160 machines, the driver shipped in 5.5 dies about once per day in this code:

        case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:{
                dev_printk(KERN_DEBUG, &pdev->dev, "STP Abort! \n");
                spin_lock_irqsave(&task->task_state_lock, flags);
                if (task->task_state_flags & SAS_TASK_NEED_DEV_RESET) {
                        /* TODO */
                        ;
                }

Could you please backport the new driver with error handling? I'd be happy to be a tester.

Comment 2 Rob Evers 2010-07-22 17:31:47 UTC
(In reply to comment #0)
> The 5.5 kernel includes a mvsas driver backported from 2.6.25, so I hear.
> 
> In 2.6.31, Marvell contributed a new driver. It has novel features like error
> handling.
> 
> On my cluster of 160 machines, the driver shipped in 5.5 dies about once per
> day in this code:
> 
>         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:{
>                 dev_printk(KERN_DEBUG, &pdev->dev, "STP Abort! \n");
>                 spin_lock_irqsave(&task->task_state_lock, flags);
>                 if (task->task_state_flags & SAS_TASK_NEED_DEV_RESET) {
>                         /* TODO */
>                         ;
>                 }
> 
> Could you please backport the new driver with error handling? I'd be happy to
> be a tester.    

Unfortunately there has been irregular and incomplete maintenance of the mvsas driver upstream by Marvell.  This leads to lack of confidence in any updates.  I have followed the mvsas driver on linux-scsi and many issues have gone unanswered by Marvell.  Should Marvell start maintaining the mvsas driver more dilligently, such updates will be more likely.

Rob

Comment 3 Orion Poplawski 2010-12-22 23:47:01 UTC
Some recent posts on lkml seem to indicate some promise with the latest mvsas as of 2.6.37-rc4 or so.  Any chance this might appear in RHEL 5 or 6?

Comment 4 Rob Evers 2010-12-23 00:32:33 UTC
(In reply to comment #3)
> Some recent posts on lkml seem to indicate some promise with the latest mvsas
> as of 2.6.37-rc4 or so.  Any chance this might appear in RHEL 5 or 6?

Unlikely, unfortunately.


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