[parted-devel] [PATCH] parted: fix the resizepart command logic

[Wang Dong]

On 04/19/2017 08:47 PM, Phil Susi wrote:
> On 4/18/2017 11:28 PM, Wang Dong wrote:
>> The user offers an end, and if it is smaller than the partition end,
>> it is a shrinking.  And this exception will only be raised when a shrinking
>> happens. I think we can check if it is a shrinking earlier. I mean
>> before to
>> change the disk layout.
> The user may specify to add 1 sector to the end, but after applying it,
> the partition table code may decide to snap it down to a cylinder
> boundary, resulting it in now shrinking the partition.
>
OK.
>> "Your discard" can not be done without a device re-reading. User has to
>> re-read
>> the device to get the real disk layout. This is not good I think. It
>> will confuse
>> user.
> You don't have to re-read.  As I said before, you just have to make a
> copy of the PedDisk, modify the copy, leaving the original alone, and
> then pick which to keep and which to discard.
>
Ah, I got you now.
-- 
Best regards. Wang Dong