Re: OpenSSI preview on Debian Lenny (on x86_64)

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Also support for 4-level page table is not yet there in vproc/as_xscribe.c.
It currently skips the PUD table.  That is probably why process migration
isn't working properly in x86_64.  I'm adding code to traverse the PUD table
as we speak.

On Sat, Apr 17, 2010 at 4:29 PM, Roger Tsang <[email protected]> wrote:

> Further it appears as_do_pg() is just a dupe of Linux install_arg_page().
> To avoid this duplication it is better to modify as_do_pg() to call
> something like ssi_install_arg_page() which is install_arg_page() without
> force_sig() in error path.
>
> On Sat, Apr 17, 2010 at 2:36 PM, John Hughes <[email protected]> wrote:
>
>> John Hughes wrote:
>>
>>  John Hughes wrote:
>>>
>>>>
>>>>       pud = pud_offset(pgd, apip->api_addr);
>>>>
>>> It seems than when we get here "pgd_none (pgd)" is true, so maybe we
>>> should be doing a pud_alloc instead of just "pud = pud_offset(...)".
>>>
>>> But it doesn't seem to work, that just makes us hang.
>>>
>> Because I screwed up.
>>
>> Yes, we should be doing pud_alloc, not just pud_offset.
>>
>> This patch makes migration work.
>>
>> Well, almost.  The migrated process seems not to be able to access its
>> terminal.
>>
>>
>>
>>
>>
>> ------------------------------------------------------------------------------
>> Download Intel&#174; Parallel Studio Eval
>> Try the new software tools for yourself. Speed compiling, find bugs
>> proactively, and fine-tune applications for parallel performance.
>> See why Intel Parallel Studio got high marks during beta.
>> http://p.sf.net/sfu/intel-sw-dev
>> _______________________________________________
>> ssic-linux-devel mailing list
>> [email protected]
>> https://lists.sourceforge.net/lists/listinfo/ssic-linux-devel
>>
>>
>

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Also support for 4-level page table is not yet there in vproc/as_xscribe.c.=
 It currently skips the PUD table.=A0 That is probably why process migratio=
n isn&#39;t working properly in x86_64.=A0 I&#39;m adding code to traverse =
the PUD table as we speak.<br>
<br><div class=3D"gmail_quote">On Sat, Apr 17, 2010 at 4:29 PM, Roger Tsang=
 <span dir=3D"ltr">&lt;<a href=3D"mailto:[email protected]">roger.tsang=
@gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=
=3D"border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; p=
adding-left: 1ex;">
Further it appears as_do_pg() is just a dupe of Linux install_arg_page().=
=A0
To avoid this duplication it is better to modify as_do_pg() to call somethi=
ng like ssi_install_arg_page() which is install_arg_page() without force_si=
g() in error path.<br><br><div class=3D"gmail_quote"><div><div></div><div c=
lass=3D"h5">
On Sat, Apr 17, 2010 at 2:36 PM, John Hughes <span dir=3D"ltr">&lt;<a href=
=3D"mailto:[email protected]" target=3D"_blank">[email protected]</a>&gt;</span> =
wrote:<br>
</div></div><blockquote class=3D"gmail_quote" style=3D"border-left: 1px sol=
id rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div>=
<div></div><div class=3D"h5">John Hughes wrote:<div><br>
<blockquote class=3D"gmail_quote" style=3D"border-left: 1px solid rgb(204, =
204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
John Hughes wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"border-left: 1px solid rgb(204, =
204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
 =A0 =A0 =A0 pud =3D pud_offset(pgd, apip-&gt;api_addr);<br>
</blockquote>
It seems than when we get here &quot;pgd_none (pgd)&quot; is true, so maybe=
 we should be doing a pud_alloc instead of just &quot;pud =3D pud_offset(..=
.)&quot;.<br>
<br>
But it doesn&#39;t seem to work, that just makes us hang.<br>
</blockquote></div>
Because I screwed up.<br>
<br>
Yes, we should be doing pud_alloc, not just pud_offset.<br>
<br>
This patch makes migration work.<br>
<br>
Well, almost. =A0The migrated process seems not to be able to access its te=
rminal.<br>
<br>
<br>
<br>
<br></div></div><div class=3D"im">-----------------------------------------=
-------------------------------------<br>
Download Intel&amp;#174; Parallel Studio Eval<br>
Try the new software tools for yourself. Speed compiling, find bugs<br>
proactively, and fine-tune applications for parallel performance.<br>
See why Intel Parallel Studio got high marks during beta.<br>
<a href=3D"http://p.sf.net/sfu/intel-sw-dev" target=3D"_blank">http://p.sf.=
net/sfu/intel-sw-dev</a><br>_______________________________________________=
<br>
ssic-linux-devel mailing list<br>
<a href=3D"mailto:[email protected]" target=3D"_blank"=
>[email protected]</a><br>
<a href=3D"https://lists.sourceforge.net/lists/listinfo/ssic-linux-devel" t=
arget=3D"_blank">https://lists.sourceforge.net/lists/listinfo/ssic-linux-de=
vel</a><br>
<br></div></blockquote></div><br>
</blockquote></div><br>

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------------------------------------------------------------------------------
Download Intel&#174; Parallel Studio Eval
Try the new software tools for yourself. Speed compiling, find bugs
proactively, and fine-tune applications for parallel performance.
See why Intel Parallel Studio got high marks during beta.
http://p.sf.net/sfu/intel-sw-dev
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