Richard
On 07/25/2016 04:01 PM, Richard Weinberger wrote:
Rajeev,
Am 25.07.2016 um 11:46 schrieb Rajeev Kumar:
This patch simply moves the verbose status messages associated with
UBI's fastmap feature to debugfs, thereby decreasing UBI
initialization time from 97 mS to 16 mS. Note that the first time
fastmap is invoked, building the fastmap took 146 mS. In order to
reproduce the test conditions, build with CONFIG_MTD_UBI_FASTMAP=y and
CONFIG_DYNAMIC_DEBUG=y and append the following to bootargs:
initcall_debug ubi.mtd=0 ubi.fm_autoconvert=1
ubi.mtd=0 is needed at every boot if you want ubi to be
autoloaded. ubi.fm_autoconvert switch is needed only once, when
fastmap is created.
So, you're working on a system which has to boot as fast as possible
and writing kernel logs hurts the performance. (Slow UART?)
Why do you change logging only in UBI (Fastmap)? Many other subsystems
print during boot and would also hurt the performance.
In such a situation I'd assume that changing the kernel log level or
using the quiet kernel parameter would help more.
Agreed, but the question is do we really need these all values for
UBI(Fastmap) on console every time system is booted ?
Thanks
~Rajeev
Thanks,
//richard
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