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Re: [dm-devel] [RFC PATCH 0/3] differentiate between I/O errors

From: Malahal Naineni <malahal us ibm com>
To: Mike Snitzer <snitzer redhat com>
Cc: michaelc cs wisc edu, jack suse cz, sshtylyov mvista com, linux-ide vger kernel org, dm-devel redhat com, James Bottomley suse de, konishi ryusuke lab ntt co jp, j-nomura ce jp nec com, hch lst de, k-ueda ct jp nec com, vst vlnb net, linux-scsi vger kernel org, linux-raid vger kernel org, tj kernel org, swhiteho redhat com, chris mason oracle com, tytso mit edu, jaxboe fusionio com, linux-kernel vger kernel org, linux-fsdevel vger kernel org, rwheeler redhat com
Subject: Re: [dm-devel] [RFC PATCH 0/3] differentiate between I/O errors
Date: Fri, 10 Dec 2010 15:40:36 -0800

Mike Snitzer [snitzer redhat com] wrote:
> Refreshed Hannes' initial "scsi: Detailed I/O errors" patch against
> v2.6.37-rc5.  v2 introduces __scsi_error_from_host_byte to avoid
> the duplicate switch statement.  Also a few whitespace and comment
> changes.
> 
> Split DM mpath change out to separate v2 patch; failed discard is now
> retryable in the face of a non-target IO error.
> 
> Added improved block layer's I/O error message (based on the finer
> grained I/O error returns afforded by SCSI).
> 
> Comments/suggestions are welcome.

I did test the Hannes original patch with the latest Linus' git tree! I
used scsi_debug to simulate path failures as well as 'Media' failures
and it did work as expected. I will test your patches soon.

Thanks, Malahal.

References:
- [dm-devel] [RFC PATCH 0/3] differentiate between I/O errors
  - From: Mike Snitzer

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