| commit | 98f9435f336cbee5d57a1a16373331ca1bc648db | |
| author | Adhemerval Zanella Netto <adhemerval.zanella@linaro.org> | |
| Thu, 12 Jan 2023 13:58:53 +0000 (12 10:58 -0300) | ||
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | |
| Wed, 1 Feb 2023 11:42:11 +0000 (1 08:42 -0300) | ||
| tree | f6e57c478194afb2323db3cba00db96e7582164b | treesnapshot (tar.gz zip) |
| parent | 1e442efd57f231bf76030d7a30f2095d1261db20 | commitdiff |
Linux: optimize clone3 internal usage
Add an optimization to avoid calling clone3 when glibc detects that
there is no kernel support. It also adds __ASSUME_CLONE3, which allows
skipping this optimization and issuing the clone3 syscall directly.
It does not handle the the small window between 5.3 and 5.5 for
posix_spawn (CLONE_CLEAR_SIGHAND was added in 5.5).
Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Add an optimization to avoid calling clone3 when glibc detects that
there is no kernel support. It also adds __ASSUME_CLONE3, which allows
skipping this optimization and issuing the clone3 syscall directly.
It does not handle the the small window between 5.3 and 5.5 for
posix_spawn (CLONE_CLEAR_SIGHAND was added in 5.5).
Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
| include/clone_internal.h | diffblobblamehistory | |
| sysdeps/unix/sysv/linux/clone-internal.c | diffblobblamehistory | |
| sysdeps/unix/sysv/linux/kernel-features.h | diffblobblamehistory |