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| author | Kent Overstreet <kent.overstreet@gmail.com> | 2022-02-15 00:06:59 -0500 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-22 17:09:24 -0400 |
| commit | eb331fe5a4e801dc11d96ba7fbda0a91c8bd626c (patch) | |
| tree | bb8144cd4214f0bf41f7e8f680c1a09d8d4adda7 /fs/bcachefs/move.c | |
| parent | fcf01959eaa828b1005f8f30732949e64edb8c4d (diff) | |
| download | linux-stable-eb331fe5a4e801dc11d96ba7fbda0a91c8bd626c.tar.gz linux-stable-eb331fe5a4e801dc11d96ba7fbda0a91c8bd626c.tar.bz2 linux-stable-eb331fe5a4e801dc11d96ba7fbda0a91c8bd626c.zip | |
bcachefs: Check for stale dirty pointer before reads
Since we retry reads when we discover we read from a pointer that went
stale, if a dirty pointer is erroniously stale it would cause us to loop
retrying that read forever - unless we check before issuing the read,
while the btree is still locked, when we know that a dirty pointer
should never be stale.
This patch adds that check, along with printing some helpful debug info.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Diffstat (limited to 'fs/bcachefs/move.c')
| -rw-r--r-- | fs/bcachefs/move.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/bcachefs/move.c b/fs/bcachefs/move.c index 04971bf847bf..4751d79219cb 100644 --- a/fs/bcachefs/move.c +++ b/fs/bcachefs/move.c @@ -752,10 +752,12 @@ static int __bch2_move_data(struct bch_fs *c, BUG(); } - /* unlock before doing IO: */ + /* + * The iterator gets unlocked by __bch2_read_extent - need to + * save a copy of @k elsewhere: + */ bch2_bkey_buf_reassemble(&sk, c, k); k = bkey_i_to_s_c(sk.k); - bch2_trans_unlock(&trans); ret2 = bch2_move_extent(&trans, ctxt, wp, io_opts, btree_id, k, data_cmd, data_opts); |