Here is an updated meta_bg online resize patches. This set of patches needs to be paired with a set of e2fsprogs patches to enable online resize. With this set of patches, we can start with a file system which uses the resize_inode scheme of reserved gdt blocks, but after we have consumed all of the reserved gdt blocks, the kernel will switch over to using the meta_bg scheme of online growth. This works both with traditional 32-bit filesystems as well newer 64-bit file systems. As an example of the sort of on-line resizes that will work, my testing included: * mke2fs -t ext4 /dev/vdc 2M ; mount /dev/vdc; resize2fs /dev/vdc 8G * mke2fs -t ext2 /dev/vdc 2M ; mount /dev/vdc; resize2fs /dev/vdc 8G * mke2fs -t ext4 -O 64bit /dev/vdc 12T ; mount /dev/vdc; resize2fs /dev/vdc 18T Theodore Ts'o (6): ext4: grow the s_flex_groups array as needed when resizing ext4: grow the s_group_info array as needed ext4: set bg_itable_unused when resizing ext4: convert file system to meta_bg if needed during resizing ext4: log a resize update to the console every 10 seconds ext4: advertise the fact that the kernel supports meta_bg resizing Yongqiang Yang (3): ext4: don't copy non-existent gdt blocks when resizing ext4: avoid duplicate writes of the backup bg descriptor blocks ext4: add online resizing support for meta_bg and 64-bit file systems fs/ext4/ext4.h | 6 + fs/ext4/ioctl.c | 15 --- fs/ext4/mballoc.c | 79 ++++++----- fs/ext4/resize.c | 386 +++++++++++++++++++++++++++++++++++++++++++++--------- fs/ext4/super.c | 50 +++++-- 5 files changed, 405 insertions(+), 131 deletions(-) -- 1.7.12.rc0.22.gcdd159b -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
