mm/ksm: initialize the addr only once in collect_procs_ksm

Patch series "KSM: use linear_page_index in collect_procs_ksm()", v2.

In collect_procs_ksm() which is used to collect processes when the error
hit an ksm page, there is the same issue with rmap_walk_ksm (see the
previous discussion at [1]).  So we apply the similar logic changes to the
collect_procs_ksm().

The patch [1/2] move the initializaion of addr from the position inside
loop to the position before the loop, since the variable will not change
in the loop.

The patch [2/2] optimize collect_procs_ksm by passing a suitable page
offset range to the anon_vma_interval_tree_foreach loop to reduce
ineffective checks.


This patch (of 2):

Similar to 318d87b8fa7 ("ksm: initialize the addr only once in
rmap_walk_ksm"), only initialize the addr once in rmap_walk_ksm because
the addr variable doesn't change across iterations.

Link: https://lore.kernel.org/20260709173212190rZdwynySRyLr9EtPuXBRU@zte.com.cn
Link: https://lore.kernel.org/all/20260703162253688u8Str9eFLR8TGCmo7nIOF@zte.com.cn/ [1]
Signed-off-by: xu xin <xu.xin16@zte.com.cn>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

0 files changed, 0 insertions, 0 deletions