On Mon, Jul 09, 2012 at 05:34:18PM -0400, vivek.goyal2008@xxxxxxxxx wrote: > Hi, > > Few people have pinged me in rencent past about status of this patch, hence, > this is V4 of patch which adds support for online resizing of a partition. > This patch is based on previously posted patches by Phillip Susi. > Hi Jens, Can you please consider partition resize patches for inclusion. Thanks Vivek > There are two patches. Out of which one is kernel patch and other one is > util-linux patch to add support of a user space utility "resizepart" to > allow resizing the partition. > > This ioctl only resizes the partition size in kenrel and does not change > the size on disk. A user needs to make sure that corresponding changes > are made to disk data structures also using fdisk(or partx), if changes > are to be retained across reboot. > > Changes since V3 > ---------------- > - Do bdput() in error path as per the Maxim's review comments. > > Changes since V2 > ---------------- > - Do not ignore the "start" parameter in RESIZE ioctl. > - Change resizepart utility to parse sysfs to get to partition start. > > Changes since V1 > ---------------- > Following are changes since the version Phillip posted. > - RESIZE ioctl ignores the partition "start" and does not expect user to > specify one. Caller needs to just specify "device", "partition number" and > "size" of new partition. > > - Got rid of part_nr_sects_write_begin/part_nr_sects_write_end functions > and replaced these with single part_nr_sects_write(). > > - Some sequence counter related changes are simply lifted from i_size_write(). > > - Initialized part->nr_sects_seq using seqcount_init(). > > Phillip, do let me know if I should put your signed-off-by also in the > patch. > > Any review feedback is welcome. > > I did following test. > > - Create a partition of 10MB on a disk using fdisk. > - Add this partition to a volume group > - Use fdisk to increase the partition size to 20MB. (First delete the > partition and then create a new one of 20MB size). > - Use resizepart to extend partition size in kernel. > resizepart /dev/sdc 1 40960 > - Do pvresize on partition so that physical volume can be incrased in > size online. > pvresize /dev/sda1 > > pvresize does recognize the new size. Also lsblk and /proc/partitions > report the new size of partition. > > Thanks > Vivek > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
