Hi Will On 05/18/21 10:47, Will Deacon wrote: > Hi folks, > > This is the long-awaited v6 of these patches which I last posted at the > end of last year: > > v1: https://lore.kernel.org/r/20201027215118.27003-1-will@xxxxxxxxxx > v2: https://lore.kernel.org/r/20201109213023.15092-1-will@xxxxxxxxxx > v3: https://lore.kernel.org/r/20201113093720.21106-1-will@xxxxxxxxxx > v4: https://lore.kernel.org/r/20201124155039.13804-1-will@xxxxxxxxxx > v5: https://lore.kernel.org/r/20201208132835.6151-1-will@xxxxxxxxxx > > There was also a nice LWN writeup in case you've forgotten what this is > about: > > https://lwn.net/Articles/838339/ > > It's taken me a while to get a v6 of this together, partly due to > addressing the review feedback on v5, but also because this has now seen > testing on real hardware which threw up some surprises in suspend/resume, > SCHED_DEADLINE and compat hwcap reporting. Thanks to Quentin for helping > me to debug those issues. > > The aim of this series is to allow 32-bit ARM applications to run on > arm64 SoCs where not all of the CPUs support the 32-bit instruction set. > Unfortunately, such SoCs are real and will continue to be productised > over the next few years at least. I can assure you that I'm not just > doing this for fun. > > Changes in v6 include: > > * Save/restore the affinity mask across execve() to 32-bit and back to > 64-bit again. > > * Allow 32-bit deadline tasks, but skip straight to fallback path when > determining new affinity mask on execve(). > > * Fixed resume-from-suspend path when the resuming CPU is 64-bit-only > by deferring wake-ups for 32-bit tasks until the secondary CPUs are > back online. > > * Bug fixes (compat hwcaps, memory leak, cpuset fallback path). > > * Documentation for arm64. It's in the divisive .rst format, but please > take a look anyway! > > I'm pretty happy with this now and it seems to do the right thing, > although the new patches in this revision would certainly benefit from > review. Series based on v5.13-rc1. It's late Fri and I'm off next week (I'm starting to sense an omen here, it's the 2nd or 3rd time the post syncs with my holiday), so a bit of a rushed review but the series looks good to me. Feel free to stick my Reviewed-by for the series, except patch 13 where I skipped it, given the few comments I had are addressed. I did test v5, but not this version. I think it had found better victims to test it now :-P Thanks! -- Qais Yousef
