On 11/23/2011 12:59 AM, Anders Darander wrote:
* Saul Wold<[email protected]> [111122 21:36]:
On 11/22/2011 06:34 AM, Anders Darander wrote:
This updates busybox to the latest stable, 1.19.3.
Among other things, there should be rudimentary support in syslogd for
systemd, by enabling CONFIG_FEATURE_SYSTEMD.
How much size does this add to busybox by having it enabled by default?
Enabling FEATURE_SYSTEMD in busybox costs 192 bytes in my tests in
qemux86.
Is it possible to conditional add a config fragment if systemd is
enabled ad the DISTRO/IMAGE_FEATURE level?
More info is required.
It has been tested and verified on qemux86 and on our local arm-based system.
However, the patch busybox-udhcpc-no_deconfig.patch has been modified to
apply, but hasn't really been tested. As we're currently mostly running static
configurations, we've only verified that udhcpc works to the extent that we
get the network up and running, not how it behaves during dhcp renewal.
Thus I'm starting this as an RFC.
Changes:
v2: * Checked the new defconfig (removed settings implying CFLAGS and
ARCH). The new defconfig should be as close as possible to the old one,
with the exception of some new utils/options.
Can you clearly enumerate what new utils and options and what their size
impact on the busybox image is.
Apart from the FEATURE_SYSTEMD discussed above, these are the other new
options that I kept the new busybox default on (i.e. these are enabled,
while I turned of quite a few other options that automatically got
enabled). All costs are evaluted using qemux86, and the busybox binary
size is checked in the packages-split/busybox/bin directory.
I don't mind disabling any of these feature in a v3, if
desired/requested. Anyway, I'm running a completely custom config for my
normal uses...
FEATURE_RTMINMAX, support RTMIN[+n] RTMAX[-n] signals, claimed to cost
~250 bytes
I can see these being useful
FEATURE_REVERSE_SEARCH claimed to cost ~0.5k
Why is this needed?
FEATURE_SKIP_ROOTFS ignore rootfs entry in mount table (tools like df
etc will ignore it).
OK
FEATURE_AR_CREATE, enable ar to create files, ~2.5k
FEATURE_SEAMLESS_XZ enable xz compression in tar, no measured cost.
XZ and UNXZ, enable xz compression, 8k
This is the one and the ar create above that sticks out, are these
needed in the general case or just for your config?
FGCONSOLE, print active console number, 128 bytes
FEATURE_LOADFONT_PSF2, FEATURE_LOADFONT_RAW, cost 576 bytes
Seems resonable, but why did we not need this before, what changed?
FEATURE_VI_ASK_TERMINAL, last resort to find terminal size, 352 bytes
Not sure about this and the FGCONSOLE above.
BLOCKDEV, perform some ioctls with block devices, cost 480 bytes
Again is this useful in the general case?
FDISK_SUPPORT_LARGE_DISKS, is disabled, it no longer wants to play with
LFS (both were enabled previously).
OK
FEATURE_MOUNT_LOOP_CREATE, create new loopback devices if needed,
couldn't see any cost
OK
FEATURE_WGET_TIMEOUT, no visible cost
OK
FEATURE_SH_HISTFILESIZE, use $HISTFILESIZE (still max limited by
config), no visible cost
OK
FEATURE_SYSLOGD_CFG, support syslog.conf, no visible cost
OK
FEATURE_SYSLOGD_READ_BUFFER_SIZE, defines the size of the read buffer,
not measured
OK
FEATURE_KLOGD_KLOGCTL, let klogd use the klogctl() interface, no visible
cost
OK
Cheers,
Anders
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