[PATCH v5 26/32] Display waited-on page index after 1min of waiting
From: David Howells <dhowells@redhat.com>
Date: 2024-12-16 20:44:55
Also in:
ceph-devel, linux-cifs, linux-fsdevel, linux-mm, linux-nfs, lkml, netfs, v9fs
Subsystem:
memory management, page cache, the rest · Maintainers:
Andrew Morton, Matthew Wilcox, Jan Kara, Linus Torvalds
--- mm/filemap.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/mm/filemap.c b/mm/filemap.c
index f61cf51c2238..1b6ab9915bc8 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c@@ -1236,6 +1236,8 @@ static inline int folio_wait_bit_common(struct folio *folio, int bit_nr, bool thrashing = false; unsigned long pflags; bool in_thrashing; + pgoff_t index = folio->index; + long timeout = 60 * HZ; if (bit_nr == PG_locked && !folio_test_uptodate(folio) && folio_test_workingset(folio)) {
@@ -1305,7 +1307,14 @@ static inline int folio_wait_bit_common(struct folio *folio, int bit_nr, if (signal_pending_state(state, current)) break; - io_schedule(); + if (timeout > 0) { + timeout = io_schedule_timeout(timeout); + if (timeout <= 0) + pr_warn("folio wait took too long (ix=%lx)\n", + index); + } else { + io_schedule(); + } continue; }