Re: [PATCH 0 of 3] [RFC] I/O Hints

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>>>>> "Dave" == Dave Chinner <david@xxxxxxxxxxxxx> writes:

Dave> Sure it could, but xfs_growfs is currently just a wrapper around
Dave> an ioctl that tells the kernel to grow the filesystem by N bytes
Dave> and the kernel does all the changes transactionally. So changing
Dave> xfs_growfs to provide this information to the kernel will
Dave> require a new userspace API for XFS to push this information
Dave> straight back down into the kernel....

Dave> Also, it would be good to verify that stored filesystem
Dave> parameters are still optimal at mount time by querying the block
Dave> device(s) when internal structures are first initialised from
Dave> disk.  Hence even a simple kernel API to this info would be
Dave> handy.

Ok, I'll see if I can come up with a reasonable interface for this.

-- 
Martin K. Petersen	Oracle Linux Engineering

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