[0/3] btrfs: extra debug output for sector size < page size cases

Message

Qu Wenruo Nov. 27, 2024, 4:06 a.m. UTC

The first patch is the long existing bug that full subpage bitmap dump
is not working for checked bitmap.
Thankfully even myself is not affected by the bug.

The second one is for a crash I hit where ASSERT() got triggered in
btrfs_folio_set_locked() after a btrfs_run_delalloc_range() failure.

The last one is for the btrfs_run_delalloc_range() failure, which is
not that rare in my environment, I guess the unsafe cache mode for my
aarch64 VM makes it too easy to hit ENOSPC.

But ENOSPC from btrfs_run_delalloc_range() itself is already a problem
for our data/metadata space reservation code, thus it should be
outputted even for non-debug build.

Qu Wenruo (3):
  btrfs: subpage: fix the bitmap dump for the locked flags
  btrfs: subpage: dump the involved bitmap when ASSERT() failed
  btrfs: add extra error messages for extent_writepage() failure

 fs/btrfs/extent_io.c | 16 +++++++++++++++
 fs/btrfs/subpage.c   | 47 ++++++++++++++++++++++++++++++++------------
 2 files changed, 50 insertions(+), 13 deletions(-)