On Tue, Jun 2, 2020 at 10:21 AM Greentime Hu <[email protected]> wrote: > > Guo Ren <[email protected]> 於 2020年5月31日 週日 下午11:52寫道： > > > > Hi Greentime & Vincent, > > > > Thx for the dynamic vlen implementation. I've two suggestions: > > - Please give out glibc patches mail URL, we need to review them together. > > - We need to consider that not all processes need vectors. Most > > system processes do not have vector features, and we should not force > > save/restore vector for every process. > > > > Hi Guo, > > Thanks for reviewing the patch. We are still cooking the glibc patch, > we will add the glibc link address once we post it. > For the save/restore mechanism in signal, it is basically the same > with FPU porting, we can optimize it when setup_sigcontext() for both > FPU and VECTOR in the future. > > /* Save the floating-point state. */ > if (has_fpu) > err |= save_fp_state(regs, &sc->sc_fpregs); > /* Save the vector state. */ > if (has_vector) > err |= save_v_state(regs, sc); > > There should be a better way to detect whether this task use > fpu/vector or not. Might be elf attributes or something else. Ok, we could improve it in future patches.
-- Best Regards Guo Ren ML: https://lore.kernel.org/linux-csky/
