Hi, I''m trying to investigate the dom0 early boot hang on my 4-core Nehalem system. Up to now I have not been able to get any keypress via the serial line into the hypervisor. With xen 3.3.1 everything (serial in- and output) works with the following xen parameters: kernel /boot/xen.gz console=com1 com1=38400 sync_console debug=yes loglvl=all guest_loglvl=all crashkernel=256M@16M With xen-unstable and the following parameters only the xen messages are seen via the serial line, input is not possible: kernel /boot/xen.gz console=com1 com1=38400 sync_console debug=yes loglvl=all guest_loglvl=all crashkernel=256M-:128M@16M What could be the reason? Any idea what I could try? Juergen -- Juergen Gross Principal Developer Operating Systems TSP ES&S SWE OS6 Telephone: +49 (0) 89 3222 2967 Fujitsu Technolgy Solutions e-mail: juergen.gross@ts.fujitsu.com Domagkstr. 28 Internet: ts.fujitsu.com D-80807 Muenchen Company details: ts.fujitsu.com/imprint.html _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
On 05/02/2010 07:04, "Juergen Gross" <juergen.gross@ts.fujitsu.com> wrote:> With xen-unstable and the following parameters only the xen messages are seen > via the serial line, input is not possible: > > kernel /boot/xen.gz console=com1 com1=38400 sync_console debug=yes loglvl=all > guest_loglvl=all crashkernel=256M-:128M@16M > > What could be the reason? Any idea what I could try?I''d diff ns16550.c and serial.c against last known good versions and start reverting patches. I don''t think all that much has changed that could really stop you receiving *any* characters. I suppose the problem could potentially be broken irq handling elsewhere in Xen... -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
On Fri, Feb 05, 2010 at 08:04:55AM +0100, Juergen Gross wrote:> Hi, > > I''m trying to investigate the dom0 early boot hang on my 4-core Nehalem > system. Up to now I have not been able to get any keypress via the serial > line into the hypervisor.Is this via a "real" serial interface or via IPMI/BMC? If it is the later this patch made by Gary Grebus might help you: http://lists.xensource.com/archives/html/xen-devel/2010-01/msg00773.html _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Konrad Rzeszutek Wilk wrote:> On Fri, Feb 05, 2010 at 08:04:55AM +0100, Juergen Gross wrote: >> Hi, >> >> I''m trying to investigate the dom0 early boot hang on my 4-core Nehalem >> system. Up to now I have not been able to get any keypress via the serial >> line into the hypervisor. > > Is this via a "real" serial interface or via IPMI/BMC? If it is the > later this patch made by Gary Grebus might help you: > http://lists.xensource.com/archives/html/xen-devel/2010-01/msg00773.htmlKonrad, you made my day! With the mentioned patch serial input is working again! Keir, could you include the mentioned patch in xen-unstable? I think it should be included in 4.0. Juergen -- Juergen Gross Principal Developer Operating Systems TSP ES&S SWE OS6 Telephone: +49 (0) 89 3222 2967 Fujitsu Technolgy Solutions e-mail: juergen.gross@ts.fujitsu.com Domagkstr. 28 Internet: ts.fujitsu.com D-80807 Muenchen Company details: ts.fujitsu.com/imprint.html _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
On 08/02/2010 07:27, "Juergen Gross" <juergen.gross@ts.fujitsu.com> wrote:>>> I''m trying to investigate the dom0 early boot hang on my 4-core Nehalem >>> system. Up to now I have not been able to get any keypress via the serial >>> line into the hypervisor. >> >> Is this via a "real" serial interface or via IPMI/BMC? If it is the >> later this patch made by Gary Grebus might help you: >> http://lists.xensource.com/archives/html/xen-devel/2010-01/msg00773.html > > Konrad, you made my day! > With the mentioned patch serial input is working again! > > Keir, could you include the mentioned patch in xen-unstable? > I think it should be included in 4.0.Will do. K. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel