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authorAlan Cox <alc@FreeBSD.org>2009-05-09 08:30:44 +0000
committerAlan Cox <alc@FreeBSD.org>2009-05-09 08:30:44 +0000
commit0d53a17bde39ba28d38165317ae4b0a6098a8e78 (patch)
treefd771168b6dc023886bb944cc8f9f58bba502563 /sys/nfsclient/nfsnode.h
parent126b14f7e87fe56edcdf33be5ff6925de5c0290c (diff)
downloadsrc-0d53a17bde39ba28d38165317ae4b0a6098a8e78.tar.gz
src-0d53a17bde39ba28d38165317ae4b0a6098a8e78.zip
Fix a race involving vnode_pager_input_smlfs(). Specifically, in the case
that vnode_pager_input_smlfs() zeroes the page, it should not mark the page as valid until after the page is zeroed. Otherwise, the page could be mapped for read access (e.g., by vm_map_pmap_enter()) before the page is zeroed. Reviewed by: tegge Eliminate gratuitous clearing of the page's dirty mask by vnode_pager_input_smlfs(). Instead, assert that the page is clean. Reviewed by: tegge Eliminate some blank lines. Eliminate pointless calls to pmap_clear_modify() and vm_page_undirty() from vnode_pager_input_old(). The page is not mapped. Therefore, it cannot have any page table entries that are modified. Eliminate an incorrect comment from vnode_pager_generic_getpages().
Notes
Notes: svn path=/head/; revision=191935
Diffstat (limited to 'sys/nfsclient/nfsnode.h')
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