| |
|
 |
|
 |
|
|
|
| |
|
|
xen-ia64-devel
RE: [Xen-ia64-devel] RE: [Xen-devel] RE: Linux PG_arch_1 conflict
|
To: |
"Isaku Yamahata" <yamahata@xxxxxxxxxxxxx> |
|
Subject: |
RE: [Xen-ia64-devel] RE: [Xen-devel] RE: Linux PG_arch_1 conflict |
|
From: |
"Tian, Kevin" <kevin.tian@xxxxxxxxx> |
|
Date: |
Tue, 14 Mar 2006 12:46:08 +0800 |
|
Cc: |
"Magenheimer, Dan \(HP Labs Fort Collins\)" <dan.magenheimer@xxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, xen-ppc-devel@xxxxxxxxxxxxxxxxxxx, Hollis Blanchard <hollisb@xxxxxxxxxx>, xen-ia64-devel@xxxxxxxxxxxxxxxxxxx |
|
Delivery-date: |
Tue, 14 Mar 2006 04:47:18 +0000 |
|
Envelope-to: |
www-data@xxxxxxxxxxxxxxxxxxx |
|
List-help: |
<mailto:xen-devel-request@lists.xensource.com?subject=help> |
|
List-id: |
Xen developer discussion <xen-devel.lists.xensource.com> |
|
List-post: |
<mailto:xen-devel@lists.xensource.com> |
|
List-subscribe: |
<http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe> |
|
List-unsubscribe: |
<http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe> |
|
Sender: |
xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
|
Thread-index: |
AcZHIf9lI2gbxGXtT2+MGZNMH6u4twAAB03A |
|
Thread-topic: |
[Xen-ia64-devel] RE: [Xen-devel] RE: Linux PG_arch_1 conflict |
>From: Isaku Yamahata
>Sent: 2006年3月14日 12:43
>> >
>> >What do you think of the followings? Too hacky?
>> >
>> >
>> >extern struct address_space xen_ia64_foreign_dummy_mapping;
>> >#define PageForeign(page) \
>> > (page->mapping == &xen_ia64_foreign_dummy_mapping)
>> >
>> >#define SetPageForeign(page, dtor) do { \
>> > set_page_private((page), (unsigned long)dtor); \
>> > (page)->mapping = &xen_ia64_foreign_dummy_mapping; \
>> >} while (0)
>> >
>> >#define ClearPageForeign(page) do { \
>> > (page)->mapping = NULL; \
>> > set_page_private((page), 0); \
>> >} while (0)
>> >
>> >#define PageForeignDestructor(page) \
>> > ( (void (*) (struct page *)) page_private((page)) )
>> >
>>
>> Hi, Isaku,
>> (page)->mapping is used to keep special destructor since that
>foreign page needs to be freed differently as normal linux pages, as you
>see in foreign_page.h. Your hack only ensures the check. Agree right
>way to go to propose PG_foreign upstream.
>
>A special destructor is kept in page->private by set_page_private() and
>get by page_private(). page->private is unsigned long so that it can
>hold pointer value.
>
>They are just defined as
>#define page_private(page) ((page)->private)
>#define set_page_private(page, v) ((page)->private = (v))
Oops, I didn't note that. :-)
Thanks,
Kevin
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
|
|
| |
|
Home