summaryrefslogtreecommitdiff
path: root/mm/shmem.c
diff options
context:
space:
mode:
authorPeter Xu <peterx@redhat.com>2022-10-31 00:41:51 +0300
committerAndrew Morton <akpm@linux-foundation.org>2022-12-01 02:58:46 +0300
commit15520a3f046998e3f57e695743e99b0875e2dae7 (patch)
tree831e756367bc6484cba5fcafc6d782b153e1b4b3 /mm/shmem.c
parentca92ea3dc5a2b01f98e9f02b7a6bc03be06fe124 (diff)
downloadlinux-15520a3f046998e3f57e695743e99b0875e2dae7.tar.xz
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/shmem.c')
-rw-r--r--mm/shmem.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/shmem.c b/mm/shmem.c
index 0a7c4a748811..7428ae3fa4b9 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1682,7 +1682,7 @@ static void shmem_set_folio_swapin_error(struct inode *inode, pgoff_t index,
swp_entry_t swapin_error;
void *old;
- swapin_error = make_swapin_error_entry(&folio->page);
+ swapin_error = make_swapin_error_entry();
old = xa_cmpxchg_irq(&mapping->i_pages, index,
swp_to_radix_entry(swap),
swp_to_radix_entry(swapin_error), 0);