Messages in this thread | | | Date | Mon, 26 Oct 2009 10:29:36 -0700 | From | Sunil Mushran <> | Subject | Re: [Ocfs2-devel] [PATCH 1/2] fiemap: Add new extent flag FIEMAP_EXTENT_SHARED |
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Jamie Lokier wrote: > It might be better to have a flag FIEMAP_EXTENT_NOT_SHARED. > > Apps which need to know the data is not shared can't safely check > !(flags & FIEMAP_EXTENT_SHARED) because of old kernels which don't set > the flag.
I'm probably not understanding your point. Won't the older kernels not set FIEMAP_EXTENT_NOT_SHARED too.
If this is important, we could always add this flag in the stable kernel trees. Both sharing of extents and fiemap are relatively new to the kernel.
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