Messages in this thread |  | | Date | Tue, 13 Jun 2006 14:32:31 +1000 | | From | Nathan Scott <> | | Subject | Re: [RFC] Slimming down struct inode |
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On Sat, Jun 10, 2006 at 12:48:27PM +0200, Jan Engelhardt wrote: > > >1) Move i_blksize (optimal size for I/O, reported by the stat system > > call). Is there any reason why this needs to be per-inode, instead > > of per-filesystem?
Sorry, missed this on the first reading - yes, there are reasons for doing this per inode, as Jan points out...
> I do not know much about XFS's realtime feature, but from what I have read > about it so far, it sounds to be a potential source where i_blksize might > differ from the regular filesystem. A guess, though.
Such a change would would indeed break XFS, in exactly the way you suggest Jan - the realtime subvolume does typically use a different blocksize from the data subvolume (the realtime extent size is used, and this can be set per-inode too), and there would now be no way to distinguish this preferred IO size difference.
cheers.
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