On Tue, Jun 08, 2021 at 04:18:42PM +0300, Andrey Semashev wrote:
On 6/8/21 3:35 PM, Greg KH wrote:
On Tue, Jun 08, 2021 at 03:06:48PM +0300, Andrey Semashev wrote:
On 6/8/21 2:13 PM, Greg KH wrote:
So what's keeping the futex2 code from doing all that futex1 does so that the futex1 code can be deleted internally?
I think, André will answer this, but my guess is, as stated above, this is a lot of work and time while the intermediate version is already useful.
useful to who? I still do not understand what users will be needing this. All I can tell is a single userspace program wants to use it, and that is a fork from the real project it was based on and that the maintainers have no plan to merge it back.
So who does need/want this?
I mentioned C++ std::atomic and Boost.Atomic before. Those need variable sized futexes.
And has anyone converted them to use this new api to see if it works well or not?
As was pointed out to me numerous times when I tried to propose readfile(), you need a real user that can show and prove it is needed before we can take new syscalls, especially complex beasts like this one.
thanks,
greg k-h