Messages in this thread | | | Date | Fri, 11 Jun 2010 12:46:44 -0400 | Subject | Re: fiemap is broken for sparse file in ext4? | From | Greg Freemyer <> |
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On Fri, Jun 11, 2010 at 11:46 AM, Eric Sandeen <sandeen@redhat.com> wrote: > Tao Ma wrote: > >>> What are you using to call fiemap? Here it seems to be working: >> I just wrote a simple test program by calling ioctl. It is attached. >> btw, you need to call it immediately after dd so that we have a chance >> that ext4 don't have time to allocate extents. ;) > > OK I take it back, I do see it. *cough* too many different filesystems > on this box ... ;) > > Yes, it does look like a bug. > > -Eric
I'm not clear how this is supposed to work.
Is this just a userspace bug in that FIEMAP_FLAG_SYNC is needed in the fiemap call, or is there a kernel bug as well?
If fiemap is called with the FIEMAP_FLAG_SYNC flag is there currently a problem?
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