Hi, This is a redesign of the patch series that fixes various interface problems with the existing "zero out this part of a block device" code. BLKZEROOUT2 is gone. The first patch is still a fix to the existing BLKZEROOUT ioctl to invalidate the page cache if the zeroing command to the underlying device succeeds. The second patch changes the internal block device functions to reject attempts to discard or zeroout that are not aligned to the logical block size. Previously, we only checked that the start/len parameters were 512-byte aligned, which caused kernel BUG_ONs for unaligned IOs to 4k-LBA devices. The third patch creates an fallocate handler for block devices, wires up the FALLOC_FL_PUNCH_HOLE flag to zeroing-discard, and connects FALLOC_FL_ZERO_RANGE to write-same so that we can have a consistent fallocate interface between files and block devices. Test cases for the new block device fallocate have been submitted to the xfstests list as generic/70[5-7], though the numbering will change to a lower number when the API and the tests are accepted upstream. Look for the v2 testcase patch, which reflects v7 of this patchset. Comments and questions are, as always, welcome. Patches are against 4.5. v7: Strengthen parameter checking and fix various code issues pointed out by Linus and Christoph. --D -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
