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linux_{5_0,5_1,testing}: restore __kernel_fpu_{begin,restore} [19.03] #61187

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merged 2 commits into from May 9, 2019
Merged

linux_{5_0,5_1,testing}: restore __kernel_fpu_{begin,restore} [19.03] #61187

merged 2 commits into from May 9, 2019

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Mic92
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@Mic92 Mic92 commented May 9, 2019 •
edited

Motivation for this change

Backport of #61076

Things done
  • Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
  • Built on platform(s)
    • NixOS
    • macOS
    • other Linux distributions
  • Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
  • Tested compilation of all pkgs that depend on this change using nix-shell -p nix-review --run "nix-review wip"
  • Tested execution of all binary files (usually in ./result/bin/)
  • Determined the impact on package closure size (by running nix path-info -S before and after)
  • Assured whether relevant documentation is up to date
  • Fits CONTRIBUTING.md.

Mic92 added 2 commits May 9, 2019 11:17
@Mic92
linux_5_0: restore __kernel_fpu_{begin,restore}
13062a4 
In 5.0er these function were removed from the public interface also zfs needs
them for AVX/AES-NI support. Without this patch for example throughput on a
encrypted zfs dataset drops to 200 MB/s from 1.2 GB/s. These functions were
removed as their was no user within the linux kernel tree itself.

(cherry picked from commit 7b77c27)
@Mic92
linux_{5_1,testing}: enable kernel fpu functions
797a946 
same motivation as in 7b77c27

(cherry picked from commit 8e1852a)
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Mic92 commented May 9, 2019

Currently building all three kernels...

@Mic92 Mic92 merged commit 2ec36d2 into NixOS:release-19.03 May 9, 2019
@Mic92 Mic92 deleted the linux-fpu branch May 9, 2019 11:54
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