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DISCONTINUED:openSUSE:11.1:Update
xen
19490-log-dirty.patch
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File 19490-log-dirty.patch of Package xen
# HG changeset patch # User Keir Fraser <keir.fraser@citrix.com> # Date 1238590175 -3600 # Node ID 2491158ccd173786590340cbcf77985f66cd2b8f # Parent 01873414cfc13f6682210551b8fb3cb1b77bb2dd x86: paging_log_dirty_op() should take care with invalid log_dirty.top Signed-off-by: Keir Fraser <keir.fraser@citrix.com> # HG changeset patch # User Keir Fraser <keir.fraser@citrix.com> # Date 1238655191 -3600 # Node ID 6dc5c26a75b90b04e7ed73cebd4643897f26c7c7 # Parent b5e7c26835c9fc2e9c26e27478a938e36f98d645 x86: A further fix to paging_log_dirty_op() -- do not unmap_domain_page(NULL) Signed-off-by: Keir Fraser <keir.fraser@citrix.com> --- a/xen/arch/x86/mm/paging.c +++ b/xen/arch/x86/mm/paging.c @@ -385,13 +385,14 @@ int paging_log_dirty_op(struct domain *d } pages = 0; - l4 = map_domain_page(mfn_x(d->arch.paging.log_dirty.top)); + l4 = (mfn_valid(d->arch.paging.log_dirty.top) ? + map_domain_page(mfn_x(d->arch.paging.log_dirty.top)) : NULL); for ( i4 = 0; (pages < sc->pages) && (i4 < LOGDIRTY_NODE_ENTRIES); i4++ ) { - l3 = mfn_valid(l4[i4]) ? map_domain_page(mfn_x(l4[i4])) : NULL; + l3 = (l4 && mfn_valid(l4[i4])) ? map_domain_page(mfn_x(l4[i4])) : NULL; for ( i3 = 0; (pages < sc->pages) && (i3 < LOGDIRTY_NODE_ENTRIES); i3++ ) @@ -429,7 +430,8 @@ int paging_log_dirty_op(struct domain *d if ( l3 ) unmap_domain_page(l3); } - unmap_domain_page(l4); + if ( l4 ) + unmap_domain_page(l4); if ( pages < sc->pages ) sc->pages = pages;
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