During the fstests run for btrfs subpage read-write support, generic/475
crashes the system with a very high chance.
It turns out the cause is also affecting btrfs subpage read-only mount
so it's worthy a quick fix.
Also the crash call site shows a new rabbit hole of hard coded
PAGE_SHIFT in readahead.
This reada problem does not only greatly slow down my test on my ARM
board, but also affects read-only mount.
So this patchset is here to address the problems, and hope these fixes
can fit into current merge window.
Qu Wenruo (2):
btrfs: fix wild pointer access during metadata read failure for
subpage
btrfs: make reada to be subpage compatible
fs/btrfs/extent_io.c | 31 ++++++++++++++++++++++++++++++-
fs/btrfs/reada.c | 35 ++++++++++++++++++-----------------
2 files changed, 48 insertions(+), 18 deletions(-)
--
2.30.1
