| Message ID | 20240708061502.9006-1-21cnbao@gmail.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | mm: Extend 'usage' parameter so that cluster_swap_free_nr() can be reused | expand |
On Mon, Jul 8, 2024 at 6:15 PM Barry Song <21cnbao@gmail.com> wrote: > > From: Barry Song <v-songbaohua@oppo.com> > > Extend a usage parameter so that cluster_swap_free_nr() can be reused by > both swapcache_clear() and swap_free(). > __swap_entry_free() is quite similar but more tricky as it requires the > return value of __swap_entry_free_locked() which cluster_swap_free_nr() > doesn't support. > > Cc: "Huang, Ying" <ying.huang@intel.com> > Cc: Chris Li <chrisl@kernel.org> > Cc: Ryan Roberts <ryan.roberts@arm.com> > Cc: Kairui Song <kasong@tencent.com> > Cc: David Hildenbrand <david@redhat.com> > Cc: Chuanhua Han <hanchuanhua@oppo.com> > Signed-off-by: Barry Song <v-songbaohua@oppo.com> > --- > mm/swapfile.c | 15 +++++---------- > 1 file changed, 5 insertions(+), 10 deletions(-) > > diff --git a/mm/swapfile.c b/mm/swapfile.c > index f7224bc1320c..70c4a9132672 100644 > --- a/mm/swapfile.c > +++ b/mm/swapfile.c > @@ -1352,7 +1352,8 @@ static void swap_entry_free(struct swap_info_struct *p, swp_entry_t entry) > } > > static void cluster_swap_free_nr(struct swap_info_struct *sis, > - unsigned long offset, int nr_pages) > + unsigned long offset, int nr_pages, > + unsigned char usage) > { > struct swap_cluster_info *ci; > DECLARE_BITMAP(to_free, BITS_PER_LONG) = { 0 }; > @@ -1363,7 +1364,7 @@ static void cluster_swap_free_nr(struct swap_info_struct *sis, > nr = min(BITS_PER_LONG, nr_pages); > for (i = 0; i < nr; i++) { > if (!__swap_entry_free_locked(sis, offset + i, 1)) > - bitmap_set(to_free, i, 1); > + bitmap_set(to_free, i, usage); I'm terribly sorry for the mis-operation(sent the wrong patch), I actually mean: if (!__swap_entry_free_locked(sis, offset + i, usage)) bitmap_set(to_free, i, 1); > } > if (!bitmap_empty(to_free, BITS_PER_LONG)) { > unlock_cluster_or_swap_info(sis, ci); > @@ -1396,7 +1397,7 @@ void swap_free_nr(swp_entry_t entry, int nr_pages) > > while (nr_pages) { > nr = min_t(int, nr_pages, SWAPFILE_CLUSTER - offset % SWAPFILE_CLUSTER); > - cluster_swap_free_nr(sis, offset, nr); > + cluster_swap_free_nr(sis, offset, nr, 1); > offset += nr; > nr_pages -= nr; > } > @@ -3492,15 +3493,9 @@ int swapcache_prepare(swp_entry_t entry) > > void swapcache_clear(struct swap_info_struct *si, swp_entry_t entry) > { > - struct swap_cluster_info *ci; > unsigned long offset = swp_offset(entry); > - unsigned char usage; > > - ci = lock_cluster_or_swap_info(si, offset); > - usage = __swap_entry_free_locked(si, offset, SWAP_HAS_CACHE); > - unlock_cluster_or_swap_info(si, ci); > - if (!usage) > - free_swap_slot(entry); > + cluster_swap_free_nr(si, offset, 1, SWAP_HAS_CACHE); > } > > struct swap_info_struct *swp_swap_info(swp_entry_t entry) > -- > 2.39.2 >
diff --git a/mm/swapfile.c b/mm/swapfile.c index f7224bc1320c..70c4a9132672 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -1352,7 +1352,8 @@ static void swap_entry_free(struct swap_info_struct *p, swp_entry_t entry) } static void cluster_swap_free_nr(struct swap_info_struct *sis, - unsigned long offset, int nr_pages) + unsigned long offset, int nr_pages, + unsigned char usage) { struct swap_cluster_info *ci; DECLARE_BITMAP(to_free, BITS_PER_LONG) = { 0 }; @@ -1363,7 +1364,7 @@ static void cluster_swap_free_nr(struct swap_info_struct *sis, nr = min(BITS_PER_LONG, nr_pages); for (i = 0; i < nr; i++) { if (!__swap_entry_free_locked(sis, offset + i, 1)) - bitmap_set(to_free, i, 1); + bitmap_set(to_free, i, usage); } if (!bitmap_empty(to_free, BITS_PER_LONG)) { unlock_cluster_or_swap_info(sis, ci); @@ -1396,7 +1397,7 @@ void swap_free_nr(swp_entry_t entry, int nr_pages) while (nr_pages) { nr = min_t(int, nr_pages, SWAPFILE_CLUSTER - offset % SWAPFILE_CLUSTER); - cluster_swap_free_nr(sis, offset, nr); + cluster_swap_free_nr(sis, offset, nr, 1); offset += nr; nr_pages -= nr; } @@ -3492,15 +3493,9 @@ int swapcache_prepare(swp_entry_t entry) void swapcache_clear(struct swap_info_struct *si, swp_entry_t entry) { - struct swap_cluster_info *ci; unsigned long offset = swp_offset(entry); - unsigned char usage; - ci = lock_cluster_or_swap_info(si, offset); - usage = __swap_entry_free_locked(si, offset, SWAP_HAS_CACHE); - unlock_cluster_or_swap_info(si, ci); - if (!usage) - free_swap_slot(entry); + cluster_swap_free_nr(si, offset, 1, SWAP_HAS_CACHE); } struct swap_info_struct *swp_swap_info(swp_entry_t entry)