From 44220d7e1e07bbf1c88215543c5877abcdb88d29 Mon Sep 17 00:00:00 2001 From: jhb Date: Fri, 24 Jul 2009 13:50:29 +0000 Subject: Add a new type of VM object: OBJT_SG. An OBJT_SG object is very similar to a device pager (OBJT_DEVICE) object in that it uses fictitious pages to provide aliases to other memory addresses. The primary difference is that it uses an sglist(9) to determine the physical addresses for a given offset into the object instead of invoking the d_mmap() method in a device driver. Reviewed by: alc Approved by: re (kensmith) MFC after: 2 weeks --- sys/vm/vm_object.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'sys/vm/vm_object.h') diff --git a/sys/vm/vm_object.h b/sys/vm/vm_object.h index 0e57aca..0b06fed 100644 --- a/sys/vm/vm_object.h +++ b/sys/vm/vm_object.h @@ -124,6 +124,15 @@ struct vm_object { } devp; /* + * SG pager + * + * sgp_pglist - list of allocated pages + */ + struct { + TAILQ_HEAD(, vm_page) sgp_pglist; + } sgp; + + /* * Swap pager * * swp_bcount - number of swap 'swblock' metablocks, each -- cgit v1.1