Hi I did this already some times ago. I'm sending my patches in the next mail.
Basically, my and Guangliang's patches have the following differences: my patch: uses per-module throttle settings Guangliang's patch: uses per-device settings (my patch could be changed to use per-device throttle too, but without userspace support it isn't much useful because userspace lvm can reload the mirror and per-device settings would be lost) my patch: uses fine grained throttling of the individual IOs in kcopyd - it measures active/inactive ratio and if the disk is active more than the specified percentage of time, sleep is inserted. Guangliang's patch: throttles on segment granularity, it waits when starting new segment, but segment is copied unthrottled. my patch: the user selects a percentage value (0 - 100) in "/sys/module/dm_mirror/parameters/raid1_resync_throttle", the device is kept active the specified percent of time Guangliang's patch: limits the number of segments per a specified interval My patch is noticeably bigger. Mikulas On Mon, 7 Jan 2013, Guangliang Zhao wrote: > Hi, > > These patches are used to add resync speed control for dm-raid1. The > second and third patch provide support for user-space tool dmsetup. > I have made some modifications by the comments. This is the third > version. > > Guangliang Zhao (3): > dm raid1: add resync speed control for dm-raid1 > dm raid1: add interface to set resync speed > dm raid1: add interface to get resync speed > > drivers/md/dm-raid1.c | 90 > ++++++++++++++++++++++++++++++++++++++++++++++++- > 1 file changed, 89 insertions(+), 1 deletion(-) > > -- > 1.7.10.4 > > -- > dm-devel mailing list > dm-de...@redhat.com > https://www.redhat.com/mailman/listinfo/dm-devel > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
