linux-kernel - Re: [PATCH 1/1] target:separate tx/rx cmd

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Date:   Fri, 6 Apr 2018 14:09:34 +0200
From:   David Disseldorp <ddiss@...e.de>
To:     Zhang Zhuoyu <zhangzhuoyu@...s.chinamobile.com>
Cc:     nab@...ux-iscsi.org, linux-scsi@...r.kernel.org,
        target-devel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] target:separate tx/rx cmd_puds

On Thu, 5 Apr 2018 13:12:12 +0200, David Disseldorp wrote:

> > -CONFIGFS_ATTR_RO(target_stat_tgt_port_, in_cmds);
> > +CONFIGFS_ATTR_RO(target_stat_tgt_port_, tx_cmds);
> > +CONFIGFS_ATTR_RO(target_stat_tgt_port_, rx_cmds);  
> 
> I don't think the in_cmds metric should be deleted here. It could be
> calculated on the fly via tx_cmds + rx_cmds + nodata_cmds.

@Zhang Zhuoyu: How about something like the following?
https://git.samba.org/?p=ddiss/linux.git;a=commitdiff;h=73723ccf433424721830797d70cfb88d4596e0fc

...this keeps the in_cmds metric, and renames tx/rx_cmds read/write_cmds
respectively. read/write_cmds is still a bit ambiguous, as it refers to
the command data direction rather than SCSI READ/WRITE CDBs, but IMO
it's clearer, and more consistent with the read/write_mbytes metrics.

Cheers, David