Comment 32 for bug 1368815

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Alexei Sheplyakov (asheplyakov) wrote :

> - 501-block-raw-posix-fix-disk-corruption-in-try-fiemap
> - (note - 502-block-raw-posic-use-seek-hole-ahead-of-fiemap (which was
> also needed in utopic) appears to be unneeded here as the code being
> changed has not yet been switched to using try_fiemap)

Actually such a enforces fsync and drastically reduces the performance of conversion.
I propose to use seek_hole instead of FIEMAP (which is basically what
 502-block-raw-posic-use-seek-hole-ahead-of-fiemap does).