hi
i try to modify code of xc_domain_save.c
and there is error, comes out from ERROR("Error when writing to state
file (5)" " (errno %d)", errno);
i am confused about where is the errno defined ,and what does variable
num mean? say errno=104 or errno=26 or some else
Thanks
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Daniel Stodden
2008-Mar-19 04:09 UTC
Re: [Xen-devel] how does variable num define for errno in libxc
On Wed, 2008-03-19 at 11:48 +0800, tgh wrote:> hi > i try to modify code of xc_domain_save.c > and there is error, comes out from ERROR("Error when writing to state > file (5)" " (errno %d)", errno); > i am confused about where is the errno defined ,and what does variable > num mean? say errno=104 or errno=26 or some elseError numbers are a C library feature. If you''re running Linux, check whether you have installed the base development manual pages and try ''man errno''. Or see a good book on C programming. good luck, Daniel -- Daniel Stodden LRR - Lehrstuhl für Rechnertechnik und Rechnerorganisation Institut für Informatik der TU München D-85748 Garching http://www.lrr.in.tum.de/~stodden mailto:stodden@cs.tum.edu PGP Fingerprint: F5A4 1575 4C56 E26A 0B33 3D80 457E 82AE B0D8 735B _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Thank you
and man errno ,there is no match or map between num,say 104 and
consist ,say EBADMSG, or maybe some book more helpful
another question
i am confused about how to use shadow mechanism ,that is, when live
migration, after shutdown VM,and XEN_DOMCTL_SHADOW_OP_CLEAN, how to make VM
remain in shadow mode XEN_DOMCTL_SHADOW_OP_ENABLE_LOGDIRTY? i have
modified the code to try to make it as follows
if ( !(xc_shadow_control(xc_handle, dom,
XEN_DOMCTL_SHADOW_OP_OFF,
NULL, 0, NULL, 0, NULL) >= 0 &&
xc_shadow_control(xc_handle, dom,
XEN_DOMCTL_SHADOW_OP_ENABLE_LOGDIRTY,
NULL, 0, NULL, 0, NULL) >= 0) )
but it seems not to work , and how to do it ,or any help
Thanks
Daniel Stodden 写道:> On Wed, 2008-03-19 at 11:48 +0800, tgh wrote:
>
>> hi
>> i try to modify code of xc_domain_save.c
>> and there is error, comes out from ERROR("Error when writing to
state
>> file (5)" " (errno %d)", errno);
>> i am confused about where is the errno defined ,and what does variable
>> num mean? say errno=104 or errno=26 or some else
>>
>
> Error numbers are a C library feature. If you''re running Linux,
check
> whether you have installed the base development manual pages and try
> ''man errno''. Or see a good book on C programming.
>
> good luck,
> Daniel
>
>
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Daniel Stodden
2008-Mar-19 11:11 UTC
Re: [Xen-devel] how does variable num define for errno in libxc
On Wed, 2008-03-19 at 16:06 +0800, tgh wrote:> Thank you > and man errno ,there is no match or map between num,say 104 and > consist ,say EBADMSG, or maybe some book more helpfulfind /usr/include -name errno.h | xargs grep 104> another question > i am confused about how to use shadow mechanism ,that is, when live > migration, after shutdown VM,and XEN_DOMCTL_SHADOW_OP_CLEAN, how to make VM > > remain in shadow mode XEN_DOMCTL_SHADOW_OP_ENABLE_LOGDIRTY? i have > modified the code to try to make it as follows > if ( !(xc_shadow_control(xc_handle, dom, > XEN_DOMCTL_SHADOW_OP_OFF, > NULL, 0, NULL, 0, NULL) >= 0 && > xc_shadow_control(xc_handle, dom, > XEN_DOMCTL_SHADOW_OP_ENABLE_LOGDIRTY, > NULL, 0, NULL, 0, NULL) >= 0) ) > > but it seems not to work , and how to do it ,or any helpDidn''t look at this code for a while. no immediate idea, sorry. regards, Daniel -- Daniel Stodden LRR - Lehrstuhl für Rechnertechnik und Rechnerorganisation Institut für Informatik der TU München D-85748 Garching http://www.lrr.in.tum.de/~stodden mailto:stodden@cs.tum.edu PGP Fingerprint: F5A4 1575 4C56 E26A 0B33 3D80 457E 82AE B0D8 735B _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Tim Deegan
2008-Mar-19 11:57 UTC
Re: [Xen-devel] how does variable num define for errno in libxc
At 12:11 +0100 on 19 Mar (1205928715), Daniel Stodden wrote:> > another question > > i am confused about how to use shadow mechanism ,that is, when live > > migration, after shutdown VM,and XEN_DOMCTL_SHADOW_OP_CLEAN, how to make VM > > remain in shadow mode XEN_DOMCTL_SHADOW_OP_ENABLE_LOGDIRTY? i have > > modified the code to try to make it as follows > > if ( !(xc_shadow_control(xc_handle, dom, > > XEN_DOMCTL_SHADOW_OP_OFF, > > NULL, 0, NULL, 0, NULL) >= 0 && > > xc_shadow_control(xc_handle, dom, > > XEN_DOMCTL_SHADOW_OP_ENABLE_LOGDIRTY, > > NULL, 0, NULL, 0, NULL) >= 0) )If the domain is already in shadow log-dirty mode, and you want it to remain in shadow log-dirty mode, surely you don''t need to do anything at all? Cheers, Tim. -- Tim Deegan <Tim.Deegan@citrix.com> Principal Software Engineer, Citrix Systems (R&D) Ltd. [Company #02300071, SL9 0DZ, UK.] _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
hi i try to hg clone parallax from http://dsg.cs.ubc.ca/parallax/hg/parallax-devel ,but failed, how could i get it? did someone succeed in hg clonning it? where else could i get it? Thanks _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel