o32_ret_from_sys_call

o32_ret_from_sys_call

[Alexander Sirotkin]

I have noticed that somewhere around 2.4.17 sys_sysmips() function from 
sysmips.c
was rewritten and call to o32_ret_from_sys_call disappear. This function 
(o32_ret_from_sys_call)
was responsible for calling do_softirq() after each system call. I'm 
curious, what is the
current mechanism in mips 2.4.x that ensures that do_softirq is called 
after system call ?

10x.

-- 
Alexander Sirotkin
SW Engineer

Texas Instruments
Broadband Communications Israel (BCIL)
Tel:  +972-9-9706587
________________________________________________________________________
"Those who do not understand Unix are condemned to reinvent it, poorly."
      -- Henry Spencer 

Re:o32_ret_from_sys_call

[Philippe De Swert]

Hi Alexander,

Do you happen to work with a clean kernel or a montavista one?
Montavista made a lot of changes which do not necessarely reflect in the
normal kernel code (especially on irq, pre-emptiveness and PCI)

> I have noticed that somewhere around 2.4.17 sys_sysmips() function from 
> sysmips.c
> was rewritten and call to o32_ret_from_sys_call disappear. This function 
> (o32_ret_from_sys_call)
> was responsible for calling do_softirq() after each system call. I'm 
> curious, what is the
> current mechanism in mips 2.4.x that ensures that do_softirq is called 
> after system call ?

regards,

Philippe
 
| Philippe De Swert -GNU/linux - uClinux freak-      
|      
| Stag developer http://stag.mind.be/  
| Emdebian developer: http://www.emdebian.org  
|   
| Please do not send me documents in a closed format. (*.doc,*.xls,*.ppt)    
| Use the open alternatives. (*.pdf,*.ps,*.html,*.txt)    
| Why? http://pallieter.is-a-geek.org:7832/~johan/word/english/    

-------------------------------------------------------
NOTE! My email address is changing to ... @scarlet.be
Please make the necessary changes in your address book. 

Re: o32_ret_from_sys_call

[Alexander Sirotkin]

[-- Attachment #1: Type: text/plain, Size: 1790 bytes --]

Hi.

I do work with montavista kernel, but regarding this particular change - 
I can see it in all kernels
(montavista, kernel.org and linux-mips). In kernel.org this change 
happened between 2.4.18 and
2.4.19, don't know when exatcly it was introduced into other kernels.

10x.


Philippe De Swert wrote:

>Hi Alexander,
>
>Do you happen to work with a clean kernel or a montavista one?
>Montavista made a lot of changes which do not necessarely reflect in the
>normal kernel code (especially on irq, pre-emptiveness and PCI)
>
>  
>
>>I have noticed that somewhere around 2.4.17 sys_sysmips() function from 
>>sysmips.c
>>was rewritten and call to o32_ret_from_sys_call disappear. This function 
>>(o32_ret_from_sys_call)
>>was responsible for calling do_softirq() after each system call. I'm 
>>curious, what is the
>>current mechanism in mips 2.4.x that ensures that do_softirq is called 
>>after system call ?
>>    
>>
>
>regards,
>
>Philippe
> 
>| Philippe De Swert -GNU/linux - uClinux freak-      
>|      
>| Stag developer http://stag.mind.be/  
>| Emdebian developer: http://www.emdebian.org  
>|   
>| Please do not send me documents in a closed format. (*.doc,*.xls,*.ppt)    
>| Use the open alternatives. (*.pdf,*.ps,*.html,*.txt)    
>| Why? http://pallieter.is-a-geek.org:7832/~johan/word/english/    
>
>-------------------------------------------------------
>NOTE! My email address is changing to ... @scarlet.be
>Please make the necessary changes in your address book. 
>
>
>
>  
>

-- 
Alexander Sirotkin
SW Engineer

Texas Instruments
Broadband Communications Israel (BCIL)
Tel:  +972-9-9706587
________________________________________________________________________
"Those who do not understand Unix are condemned to reinvent it, poorly."
      -- Henry Spencer 


[-- Attachment #2: Type: text/html, Size: 2502 bytes --]