diff options
| author | Miaohe Lin <linmiaohe@huawei.com> | 2020-12-14 19:06:01 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-12-15 12:13:39 -0800 |
| commit | e97af69950ffe8be4ee12b331924b8de8a17b73e (patch) | |
| tree | fcadc256719e63d238ec5f15713f1a373db3438c /mm/swapfile.c | |
| parent | d8aa24e04fb2a74dac0f7709da36950da5502be1 (diff) | |
mm/swap_state: skip meaningless swap cache readahead when ra_info.win == 0
swap_ra_info() may leave ra_info untouched in non_swap_entry() case as
page table lock is not held. In this case, we have ra_info.nr_pte == 0
and it is meaningless to continue with swap cache readahead. Skip such
ops by init ra_info.win = 1.
[akpm@linux-foundation.org: clean up struct init]
Link: https://lkml.kernel.org/r/20201009133059.58407-1-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/swapfile.c')
0 files changed, 0 insertions, 0 deletions