3.15.4 runs *significantly* slower than 3.15.3 on iMX233 CPU

3.15.4 runs *significantly* slower than 3.15.3 on iMX233 CPU

[Manuel Reimer]

Hello,

maybe someone can help me to find the reason for this problem:

If I run my iMX233 development board with an 3.15.3 kernel, then the 
performance is much better as with an 3.15.4 kernel.

I have the first significant "hanging" here:

[    7.910000] sd 0:0:0:0: [sda] Attached SCSI removable disk
[   10.810000] random: nonblocking pool is initialized
[   24.310000] systemd[1]: systemd 214 running in system mode. (+PAM 
-AUDIT -SELINUX -IMA -SYSVINIT +LIBCRYPTSETUP +GCRYPT +ACL +XZ +SECCOMP 
-APPARMOR)

After booting up it takes several seconds between entering the username 
and the password while with version 3.15.3 the password prompt appears 
almost immediately after entering the username.

Please tell me if some additional information is needed.

Thank you very much in advance.

Greetings,

Manuel

Re: 3.15.4 runs *significantly* slower than 3.15.3 on iMX233 CPU

[Marcelo Ricardo Leitner]

Em 07-07-2014 15:13, Manuel Reimer escreveu:
> Hello,

Hi,

> maybe someone can help me to find the reason for this problem:
>
> If I run my iMX233 development board with an 3.15.3 kernel, then the
> performance is much better as with an 3.15.4 kernel.
>
> I have the first significant "hanging" here:
>
> [    7.910000] sd 0:0:0:0: [sda] Attached SCSI removable disk
> [   10.810000] random: nonblocking pool is initialized
> [   24.310000] systemd[1]: systemd 214 running in system mode. (+PAM
> -AUDIT -SELINUX -IMA -SYSVINIT +LIBCRYPTSETUP +GCRYPT +ACL +XZ +SECCOMP
> -APPARMOR)
>
> After booting up it takes several seconds between entering the username
> and the password while with version 3.15.3 the password prompt appears
> almost immediately after entering the username.
>
> Please tell me if some additional information is needed.

Did you try some git bisecting between these two versions, right? It's 
only 67 commits to go and it will probably give you the culprit right away.

Marcelo

> Thank you very much in advance.
>
> Greetings,
>
> Manuel
>
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