Re: [PATCH 4.19] ext4: fix race condition between ext4_ioctl_setflags and ext4_fiemap

Baokun Li
2022-07-20T01:52:32Z

在 2022/7/19 22:06, Theodore Ts'o 写道:
> On Tue, Jul 19, 2022 at 01:26:57PM +0200, Greg KH wrote:
>> On Sat, Jul 16, 2022 at 10:33:30AM +0800, Baokun Li wrote:
>>> This problem persists until the patch d3b6f23f7167("ext4: move ext4_fiemap
>>> to use iomap framework") is incorporated in v5.7-rc1.
>> Then why not ask for that change to be added instead?
> Switching over to use the iomap framework is a quite invasive change,
> which is fraught with danager and potential performance regressions.
> So it's really not something that would be considered safe for an LTS
> kernel.
>
> As an upstream developer I'd ask why are people trying to use a kernel
> as old as 4.19, but RHEL has done more insane things than that. Also,
> I know what the answer is, and it's just too depressing for a nice
> summer day like this. :-)
>
> - Ted
> .

Indeed.

--
With Best Regards,
Baokun Li