The patch titled
page migration: Remove useless mapping checks
has been removed from the -mm tree. Its filename is
swapless-page-migration-modify-core-logic-remove-useless-mapping-checks.patch
This patch was probably dropped from -mm because
it has now been merged into a subsystem tree or
into Linus's tree, or because it was folded into
its parent patch in the -mm tree.
------------------------------------------------------
Subject: page migration: Remove useless mapping checks
From: Christoph Lameter <clameter@xxxxxxx>
Page migration still checked for mapping being NULL after taking the
tree_lock. However the mapping never changes for a locked page. Remove two
more checks for mapping being NULL.
Signed-off-by: Christoph Lameter <clameter@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
mm/migrate.c | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)
diff -puN mm/migrate.c~swapless-page-migration-modify-core-logic-remove-useless-mapping-checks mm/migrate.c
--- devel/mm/migrate.c~swapless-page-migration-modify-core-logic-remove-useless-mapping-checks 2006-05-11 00:03:10.000000000 -0700
+++ devel-akpm/mm/migrate.c 2006-05-11 00:03:10.000000000 -0700
@@ -256,7 +256,7 @@ static int migrate_page_move_mapping(str
if (!mapping) {
/* Anonymous page */
- if (page_count(page) != 1 || !page->mapping)
+ if (page_count(page) != 1)
return -EAGAIN;
return 0;
}
@@ -267,8 +267,7 @@ static int migrate_page_move_mapping(str
&mapping->page_tree,
page_index(page));
- if (!page_mapping(page) ||
- page_count(page) != 2 + !!PagePrivate(page) ||
+ if (page_count(page) != 2 + !!PagePrivate(page) ||
*radix_pointer != page) {
write_unlock_irq(&mapping->tree_lock);
return -EAGAIN;
_
Patches currently in -mm which might be from clameter@xxxxxxx are
page-migration-make-do_swap_page-redo-the-fault.patch
slab-extract-cache_free_alien-from-__cache_free.patch
migration-remove-unnecessary-pageswapcache-checks.patch
page-migration-cleanup-rename-ignrefs-to-migration.patch
page-migration-cleanup-group-functions.patch
page-migration-cleanup-remove-useless-definitions.patch
page-migration-cleanup-drop-nr_refs-in-remove_references.patch
page-migration-cleanup-extract-try_to_unmap-from-migration-functions.patch
page-migration-cleanup-pass-mapping-to-migration-functions.patch
page-migration-cleanup-move-fallback-handling-into-special-function.patch
swapless-pm-add-r-w-migration-entries.patch
swapless-pm-add-r-w-migration-entries-fix-2.patch
swapless-page-migration-rip-out-swap-based-logic.patch
swapless-page-migration-modify-core-logic.patch
more-page-migration-do-not-inc-dec-rss-counters.patch
more-page-migration-use-migration-entries-for-file-pages.patch
page-migration-update-documentation.patch
mm-remove-vm_locked-before-remap_pfn_range-and-drop-vm_shm.patch
page-migration-simplify-migrate_pages.patch
page-migration-simplify-migrate_pages-tweaks.patch
page-migration-handle-freeing-of-pages-in-migrate_pages.patch
page-migration-use-allocator-function-for-migrate_pages.patch
page-migration-support-moving-of-individual-pages.patch
page-migration-detailed-status-for-moving-of-individual-pages.patch
page-migration-support-moving-of-individual-pages-fixes.patch
page-migration-support-moving-of-individual-pages-x86_64-support.patch
page-migration-support-moving-of-individual-pages-x86-support.patch
page-migration-support-a-vma-migration-function.patch
allow-migration-of-mlocked-pages.patch
cpuset-remove-extra-cpuset_zone_allowed-check-in-__alloc_pages.patch
-
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