Date: Thu, 22 Nov 2001 17:23:27 +0800 From: "XuYifeng" <xuyifeng@peoplemail.com.cn> To: <freebsd-questions@freebsd.org> Subject: vm_uiomove() help Message-ID: <001a01c17337$58592fc0$ef01a8c0@davidwnt>
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Hi,
I am studying FreeBSD vm source code, currently I am blocked by
vm_uiomove() in vm_map.c, could anyone tell me why we need
following lines to determine if it the first_object was not replaced:
if ((first_object->type == OBJT_VNODE) &&
((oldobject = entry->object.vm_object) == first_object))
I see vm_map_clip_start{end} don't replace object within that entry,
so ((oldobject = entry->object.vm_object) == first_object) is needn't,
am I wrong?
--
Regards,
David Xu
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