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| author | Hugh Dickins <hughd@google.com> | 2017-02-07 11:11:16 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-07 12:08:32 -0800 |
| commit | b6789123bccba8b5feb9901ed2e8c3c39181979d (patch) | |
| tree | 91243683ee007ed611fa01a3cbb89fc814fcb3db /fs/proc/page.c | |
| parent | a524c218bc94c705886a0e0fedeee45d1931da32 (diff) | |
| download | lwn-b6789123bccba8b5feb9901ed2e8c3c39181979d.tar.gz lwn-b6789123bccba8b5feb9901ed2e8c3c39181979d.zip | |
mm: fix KPF_SWAPCACHE in /proc/kpageflags
Commit 6326fec1122c ("mm: Use owner_priv bit for PageSwapCache, valid
when PageSwapBacked") aliased PG_swapcache to PG_owner_priv_1 (and
depending on PageSwapBacked being true).
As a result, the KPF_SWAPCACHE bit in '/proc/kpageflags' should now be
synthesized, instead of being shown on unrelated pages which just happen
to have PG_owner_priv_1 set.
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc/page.c')
| -rw-r--r-- | fs/proc/page.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/proc/page.c b/fs/proc/page.c index a2066e6dee90..2726536489b1 100644 --- a/fs/proc/page.c +++ b/fs/proc/page.c @@ -173,7 +173,8 @@ u64 stable_page_flags(struct page *page) u |= kpf_copy_bit(k, KPF_ACTIVE, PG_active); u |= kpf_copy_bit(k, KPF_RECLAIM, PG_reclaim); - u |= kpf_copy_bit(k, KPF_SWAPCACHE, PG_swapcache); + if (PageSwapCache(page)) + u |= 1 << KPF_SWAPCACHE; u |= kpf_copy_bit(k, KPF_SWAPBACKED, PG_swapbacked); u |= kpf_copy_bit(k, KPF_UNEVICTABLE, PG_unevictable); |