On Fri, 2011-02-25 at 04:58 +0000, Ben Hutchings wrote: > Package: linux-2.6 > Version: 2.6.32-30 > Severity: grave > > The FIEMAP ioctl allows userland to query how file extents are mapped > to disk blocks. Some filesystems that implement delayed allocation > (at least btrfs and ext4) will wrongly report that the file extents > for which blocks have not been allocated are holes in the file > (i.e. that no data has been written to them and they are treated as > all-zeroes). Any program that relies on this information to optimise > file copying may fail to copy data that was recently appended to a > file on these types of filesystem. > > See <http://lwn.net/Articles/429345/>.
Please do not upload coreutils 8.10 until this bug is fixed in the kernel in all suites. Ben. -- Ben Hutchings Once a job is fouled up, anything done to improve it makes it worse.
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