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[Xen-devel] PG_blkback handling issue?
| To: | <xen-devel@xxxxxxxxxxxxxxxxxxx> |
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| Subject: | [Xen-devel] PG_blkback handling issue? |
| From: | "Jan Beulich" <JBeulich@xxxxxxxxxx> |
| Date: | Fri, 16 Oct 2009 08:50:09 +0100 |
| Delivery-date: | Fri, 16 Oct 2009 00:50:17 -0700 |
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This flag, introduced with blktap2, seems to be sticky when blktap2 isn't actively involved in any operations, since blkback-pagemap.c is only ever setting or testing this bit. Shouldn't blkback_pagemap_clear() clear it? And it would seem to me that, for safety purposes, both PG_blkback and PG_netback should be included in the checks in mm/page_alloc.c which already look at PG_foreign and (for ix86) PG_pinned. Thanks, Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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