[systemd-devel] Fwd: systemd / udev / kernel 3.3 / vmware

[Reindl Harald]

sorry for off-list reply :-(

Am 22.04.2012 13:01, schrieb Lennart Poettering:
> On Sat, 21.04.12 13:25, Reindl Harald (h.reindl at thelounge.net) wrote:
> 
>> can someone please take a look at this F16 report?
>> https://bugzilla.redhat.com/show_bug.cgi?id=806548
>>
>> * boot sometimes terrible slow
>> * randomly boot fails with udev crashing / timeout
>> * shutdown terrible slow
>> * partly also on physical machines but not sooo slow
>>
>> since most of the boot time is consumed by udev and
>> the terrible slow shutdown of > 30 seconds happens
>> while unmounting "old..." i guess this is not only
>> the kernel
>>
>> feels like interaction between kernel/udev/systemd
>>
>> on shutdown / reboot i can randomly see each single
>> unmounting line for 1-2 seconds, this is odd
>>
>> i have virtual machines which booted in 5-6 seconds
>> and are now degraded up to 1 minute
> 
> The bug report suggests this was about a kernel feature
> (CONFIG_RCU_FAST_NO_HZ=y) and not related to systemd, no?

my knowledge is not big enough on internals

but "CONFIG_RCU_FAST_NO_HZ=y" exlains also the 1-2 seconds
of each unmount message at shutdown?

on the other hand, even if: this degraded boot/shutdown should
not happen, especially not in combination of systemd/udev/kernel
as shipped with F16 in a stable release and at least generally
not onlöy because a official kernel config param is set

if you really say "CONFIG_RCU_FAST_NO_HZ" must be "no" please
add a clear statement to the bugreport - before this change
all worked fine and now i have to pray on each boot :-(



-- 

Mit besten Grüßen, Reindl Harald
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