Change Details

Kernel dump Zstd compression can be enabled by adding '-Z' to dumpon_flags in rc.conf(5). savecore(8) will automatically save kernel zstd dumps with a .zst extension. Zstd compression level can be configured with the sysctl/tunable kern.kerneldump_zstdlevel. Note that setting the sysctl at runtime does not immediately change the compression level that will be used at dump time. To update that, run "service dumpon restart". Support is also added for user core dumps compressed with Zstd. User Zstd-compressed cores can be enabled via the sysctl/tunable kern.compress_user_cores. If your kernel is configured with both GZIO and ZSTDIO options, set sysctl/tunable kern.compress_user_cores_zstd to "1" to preferentially compress userspace cores with Zstd instead of gzip. The Zstd compression level can be configured with the sysctl/tunable kern.compress_user_cores_zstdlevel. For both kernel and userspace core dump compression, the default Zstd level is arbitrarily chosen as 6. This revision adds the ZSTDIO option to AMD64 GENERIC by default. GZIO is still a non-default option.

Kernel dump Zstd compression can be enabled by adding '-Z' to dumpon_flags in rc.conf(5). savecore(8) will automatically save kernel zstd dumps with a .zst extension. Zstd compression level can be configured with the sysctl/tunable kern.kerneldump_zstdlevel. Note that setting the sysctl at runtime does not immediately change the compression level that will be used at dump time. To update that, run "service dumpon restart". Support is also added for user core dumps compressed with Zstd. User Zstd-compressed cores can be enabled via the sysctl/tunable kern.compress_user_cores. If your kernel is configured with both GZIO and ZSTDIO options, set sysctl/tunable kern.compress_user_cores_zstd to "1" to preferentially compress userspace cores with Zstd instead of gzip. The Zstd compression level can be configured with the sysctl/tunable kern.compress_user_cores_zstdlevel. For both kernel and userspace core dump compression, the default Zstd level is arbitrarily chosen as 6. This revision adds the ZSTDIO option to AMD64 GENERIC by default. GZIO is still a non-default option.

Kernel dump Zstd compression can be enabled by adding '-Z' to dumpon_flags in rc.conf(5). savecore(8) will automatically save kernel zstd dumps with a .zst extension. Zstd compression level can be configured with the sysctl/tunable kern.kerneldump_zstdlevel. Note that setting the sysctl at runtime does not immediately change the compression level that will be used at dump time. To update that, run "service dumpon restart". Support is also added for user core dumps compressed with Zstd. User Zstd-compressed cores can be enabled via the sysctl/tunable kern.compress_user_cores. If your kernel is configured with both GZIO and ZSTDIO options, set sysctl/tunable kern.compress_user_cores_zstd to "1" to preferentially compress userspace cores with Zstd instead of gzip. The Zstd compression level can be configured with the sysctl/tunable kern.compress_user_cores_zstdlevel. For both kernel and userspace core dump compression, the default Zstd level is arbitrarily chosen as 6. This revision adds the ZSTDIO option to AMD64 GENERIC by default. GZIO is still a non-default option.