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Diffstat (limited to 'poky/documentation/ref-manual/ref-variables.rst')
| -rw-r--r-- | poky/documentation/ref-manual/ref-variables.rst | 30 |
1 files changed, 24 insertions, 6 deletions
diff --git a/poky/documentation/ref-manual/ref-variables.rst b/poky/documentation/ref-manual/ref-variables.rst index db0cc2d66e..b8d56a082b 100644 --- a/poky/documentation/ref-manual/ref-variables.rst +++ b/poky/documentation/ref-manual/ref-variables.rst @@ -3846,10 +3846,10 @@ system and gives an overview of their function and contents. :: KERNEL_EXTRA_FEATURES ?= "features/netfilter/netfilter.scc features/taskstats/taskstats.scc" - KERNEL_FEATURES_append = "${KERNEL_EXTRA_FEATURES}" - KERNEL_FEATURES_append_qemuall = "cfg/virtio.scc" + KERNEL_FEATURES_append = " ${KERNEL_EXTRA_FEATURES}" + KERNEL_FEATURES_append_qemuall = " cfg/virtio.scc" KERNEL_FEATURES_append_qemux86 = " cfg/sound.scc cfg/paravirt_kvm.scc" - KERNEL_FEATURES_append_qemux86-64 = "cfg/sound.scc" + KERNEL_FEATURES_append_qemux86-64 = " cfg/sound.scc" :term:`KERNEL_FIT_LINK_NAME` The link name of the kernel flattened image tree (FIT) image. This @@ -4048,7 +4048,7 @@ system and gives an overview of their function and contents. SRCREV_machine_core2-32-intel-common = "43b9eced9ba8a57add36af07736344dcc383f711" KMACHINE_core2-32-intel-common = "intel-core2-32" KBRANCH_core2-32-intel-common = "standard/base" - KERNEL_FEATURES_append_core2-32-intel-common = "${KERNEL_FEATURES_INTEL_COMMON}" + KERNEL_FEATURES_append_core2-32-intel-common = " ${KERNEL_FEATURES_INTEL_COMMON}" The ``KMACHINE`` statement says that the kernel understands the machine name as "intel-core2-32". @@ -7542,7 +7542,7 @@ system and gives an overview of their function and contents. ``SYSTEMD_BOOT_CFG`` as follows: :: - SYSTEMD_BOOT_CFG ?= "${:term:`S`}/loader.conf" + SYSTEMD_BOOT_CFG ?= "${S}/loader.conf" For information on Systemd-boot, see the `Systemd-boot documentation <http://www.freedesktop.org/wiki/Software/systemd/systemd-boot/>`__. @@ -8745,4 +8745,22 @@ system and gives an overview of their function and contents. The default value of ``XSERVER``, if not specified in the machine configuration, is "xserver-xorg xf86-video-fbdev xf86-input-evdev". - + + :term:`XZ_THREADS` + Specifies the number of parallel threads that should be used when + using xz compression. + + By default this scales with core count, but is never set less than 2 + to ensure that multi-threaded mode is always used so that the output + file contents are deterministic. Builds will work with a value of 1 + but the output will differ compared to the output from the compression + generated when more than one thread is used. + + On systems where many tasks run in parallel, setting a limit to this + can be helpful in controlling system resource usage. + + :term:`XZ_MEMLIMIT` + Specifies the maximum memory the xz compression should use as a percentage + of system memory. If unconstrained the xz compressor can use large amounts of + memory and become problematic with parallelism elsewhere in the build. + "50%" has been found to be a good value. |