On Mon, Jan 16, 2017 at 12:27:55PM +0000, Yao Qi wrote: > On 17-01-12 11:26:06, Dave Martin wrote: > > Currently the vector length is inherited across both fork() and > > exec(). > > > > Inheritance across fork() is desirable both for creating a copy of > > a process (traditional fork) or creating a thread (where we want > > all threads to share the same VL by default). > > > > Inheritance across exec() is less desirable, because of the ABI > > impact of large vector lengths on the size of the signal frame -- > > when running a new binary, there is no guarantee that the new > > binary is compatible with these ABI changes. > > > > This flag makes the vector length non-inherited by default. > > Can we make vector length inherited across fork but non-inherited > across exec by default? That is the behaviour: I always inherit across fork/clone, since you are still running the same binary after those. I could word the commit message a bit more clearly here. Cheers ---Dave -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
