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| author | Peter Xu <peterx@redhat.com> | 2022-10-30 17:41:51 -0400 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-11-30 15:58:46 -0800 |
| commit | 15520a3f046998e3f57e695743e99b0875e2dae7 (patch) | |
| tree | 831e756367bc6484cba5fcafc6d782b153e1b4b3 /mm/zsmalloc.c | |
| parent | ca92ea3dc5a2b01f98e9f02b7a6bc03be06fe124 (diff) | |
| download | linux-starfive-15520a3f046998e3f57e695743e99b0875e2dae7.tar.gz linux-starfive-15520a3f046998e3f57e695743e99b0875e2dae7.tar.bz2 linux-starfive-15520a3f046998e3f57e695743e99b0875e2dae7.zip | |
mm: use pte markers for swap errors
PTE markers are ideal mechanism for things like SWP_SWAPIN_ERROR. Using a
whole swap entry type for this purpose can be an overkill, especially if
we already have PTE markers. Define a new bit for swapin error and
replace it with pte markers. Then we can safely drop SWP_SWAPIN_ERROR and
give one device slot back to swap.
We used to have SWP_SWAPIN_ERROR taking the page pfn as part of the swap
entry, but it's never used. Neither do I see how it can be useful because
normally the swapin failure should not be caused by a bad page but bad
swap device. Drop it alongside.
Link: https://lkml.kernel.org/r/20221030214151.402274-3-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Huang Ying <ying.huang@intel.com>
Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Naoya Horiguchi <naoya.horiguchi@nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/zsmalloc.c')
0 files changed, 0 insertions, 0 deletions