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[Xen-devel] Re: xenstore index reset in xb_init_comms breaks domU kdump
| To: | Keir Fraser <keir@xxxxxxx> |
|---|---|
| Subject: | [Xen-devel] Re: xenstore index reset in xb_init_comms breaks domU kdump |
| From: | Olaf Hering <olaf@xxxxxxxxx> |
| Date: | Wed, 26 Jan 2011 15:30:47 +0100 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Wed, 26 Jan 2011 06:31:32 -0800 |
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On Wed, Jan 26, Keir Fraser wrote: > I think it is needed for save/restore. It may not be needed during boot > though. Your safest (lowest impact) fix would be to skip the reset when > booting a crash kernel. A kernel knows it is a crash kernel, I believe? There is is is_kdump_kernel(), which relies on an unexported variable. However, the kdump tool in SLES11 passes 'reset_devices' in cmdline. And this variable is exported and used in a few drivers to do extra hardware reset. My patch adds a if (!reset_devices) before the assignment. reset_devices was added in commit 7e96287ddc4f42081e18248b6167041c0908004c and appeared in 2.6.19. Its not yet part of linux-2.6.18-xen.hg, it should be easy to backport. I will post my SLES11 SP1 version of the kdump patch shortly. Olaf _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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