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[Xen-devel] [PATCH] i386 linux: make 32-bit PAE kernel work when built w
| To: | <xen-devel@xxxxxxxxxxxxxxxxxxx> |
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| Subject: | [Xen-devel] [PATCH] i386 linux: make 32-bit PAE kernel work when built with newer gcc |
| From: | "Jan Beulich" <JBeulich@xxxxxxxxxx> |
| Date: | Mon, 13 Mar 2006 17:40:12 +0100 |
| Delivery-date: | Mon, 13 Mar 2006 16:41:09 +0000 |
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The compiler isn't required to order the two stores ptep_get_and_clear_full() in any particular way, and we saw cases where the upper 32 bits get stored before the lower ones, which causes the access to fail (page-fault propagated out of Xen). Jan
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