RE: Linux 3.1-rc1 (nfs/pnfs and drivers/md)

[tao.peng]

> -----Original Message-----
> From: Christoph Hellwig [mailto:hch@xxxxxxxxxxxxx]
> Sent: Thursday, August 11, 2011 2:07 PM
> To: Peng, Tao
> Cc: torvalds@xxxxxxxxxxxxxxxxxxxx; rdunlap@xxxxxxxxxxxx; bergwolf@xxxxxxxxx;
> Trond.Myklebust@xxxxxxxxxx; linux-raid@xxxxxxxxxxxxxxx;
> linux-kernel@xxxxxxxxxxxxxxx; linux-nfs@xxxxxxxxxxxxxxx
> Subject: Re: Linux 3.1-rc1 (nfs/pnfs and drivers/md)
> 
> Note that the object layout also effectively needs the block layer.
> 
That is taken care of by PNFS_OBJLAYOUT depending on SCSI_OSD_ULD.

The dependency chain for PNFS_OBJLAYOUT on BLOCK is:
PNFS_OBJLAYOUT-> SCSI_OSD_ULD -> SCSI_OSD_INITIATOR -> SCSI-> BLOCK

With the patch, if CONFIG_BLOCK is not set, pnfs file layout can still be built.

Thanks,
Tao

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