linux-kernel - Re: GFS2: Pre-pull patch posting (merge window)

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Date:	Fri, 23 Mar 2012 13:06:05 -0700
From:	Randy Dunlap <rdunlap@...otime.net>
To:	David Teigland <teigland@...hat.com>
CC:	Steven Whitehouse <swhiteho@...hat.com>,
	linux-kernel@...r.kernel.org, cluster-devel@...hat.com
Subject: Re: GFS2: Pre-pull patch posting (merge window)

On 03/23/2012 12:41 PM, David Teigland wrote:

> 
>> on i386:
>>
>> ERROR: "sctp_do_peeloff" [fs/dlm/dlm.ko] undefined!
>>
>>
>> GFS2_FS selects DLM (if GFS2_FS_LOCKING_DLM, which is enabled).
>> GFS2_FS selects IP_SCTP if DLM_SCTP, which is not enabled and not
>> used anywhere else in the kernel tree AFAICT.
>> DLM just always selects IP_SCTP.
> 
> Here's what we have now:
> 
> config GFS2_FS
>         tristate "GFS2 file system support"
>         depends on (64BIT || LBDAF)
>         select DLM if GFS2_FS_LOCKING_DLM
>         select CONFIGFS_FS if GFS2_FS_LOCKING_DLM
>         select SYSFS if GFS2_FS_LOCKING_DLM
>         select IP_SCTP if DLM_SCTP
>         select FS_POSIX_ACL
>         select CRC32
>         select QUOTACTL
> 
> menuconfig DLM
>         tristate "Distributed Lock Manager (DLM)"
>         depends on EXPERIMENTAL && INET
>         depends on SYSFS && CONFIGFS_FS && (IPV6 || IPV6=n)
>         select IP_SCTP
> 
> Why does gfs2 Kconfig bother with SCTP at all?  It seems that line should
> just be removed.  I'll also remove EXPERIMENTAL.  I don't understand the
> vagaries of Kconfig, so a dumb question, how could sctp_do_peeloff
> possibly be undefined if we're selecting SCTP.

What is selecting SCTP?  DLM?  so GFS2 selects DLM, but selects
don't follow dependency chains.  Also, the "select IP_SCTP if DLM_SCTP"
in GFS2 is meaningless since there is no DLM_SCTP.

I just verified that the (posted) failing config still fails with
today's linux-next.

-- 
~Randy
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