On 1/15/2011 12:40 AM, Dirk Behme wrote:
There are some reports [1] [2] looking at the boot time of embedded
(ARM?) systems using initcall debug [3]. Both reports seem to show
that they have issues with the start up sequence of the kernel being
completely single-threaded. In [2] Greg mentions that on a x86 box
multi-threads are happening and that there he doesn't see this issue.
On the other hand, both reports mention Arjan's async initcall patches
[4] to help against the issue. I.e. introducing some parallelization
(on ARM) does help, too.
With this, I wonder
- if anybody faces similar issues with single-threaded only kernel
start on embedded (ARM?) systems? Or if this is known? Or if there are
fixes for this?
- if we somehow should try to 're-activate' Arjan's async initcall
patches?
those patches are obsoleted by the merged async_schedule() calls.
what kernel are you seeing issues on?
if it's something ancient, you should update first.
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