In the original source code, READ_ONCE(xxx) is in if test. In your
commit, you move READ_ONCE out of this if test.
So the time slot exists between fetching and using. In the original
source code, it does not exist. And the fetching and using are not
protected by locks. As is suggested by Leon.
This will introduce risks.
The binary is based on optimization level and architectures. It is very
complicated.
Zhu Yanjun
On 11.03.24 03:57, linke li wrote:
This is not a smp problem. Compared with the original source, your
commit introduces a time slot.
I don't know what do you mean by a time slot. In the binary level, they
have the same code.
