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[Xen-devel] [PATCH][UPDATED] Page offline support in Xen side
| To: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx>, Tim Deegan <Tim.Deegan@xxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] [PATCH][UPDATED] Page offline support in Xen side |
| From: | "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> |
| Date: | Thu, 5 Mar 2009 17:11:53 +0800 |
| Accept-language: | en-US |
| Acceptlanguage: | en-US |
| Cc: | "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Thu, 05 Mar 2009 01:13:27 -0800 |
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| Thread-index: | AcmdcmyPMKoSSoCDQli1PHf0uyKBoA== |
| Thread-topic: | [PATCH][UPDATED] Page offline support in Xen side |
This patch add support to offline a page. The basical idea is, when a page is assigned, it will be marked offline pending and be moved out of buddy when freed, when a page is free, it will be moved out of buddy directly. One notice after this change is, now the page->count_info is not always 0, especially for shadow page, since the PGC_offlining bit may be set. Signed-off-by: Wang, Shane <shane.wang@xxxxxxxxx> Signed-off-by: Jiang, Yunhong <yunhong.jiang@xxxxxxxxx> The offline/online action is protected by heap_lock, but we need make sure other code will not clean the flags, this is achieved by next patch to be sent. Thanks Yunhong Jiang
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