diff options
| author | Kent Overstreet <kent.overstreet@linux.dev> | 2023-05-28 03:44:38 -0400 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-22 17:10:03 -0400 |
| commit | d95dd378c207ddec7551cce2e047e6067c3c27ab (patch) | |
| tree | 559134f6a725b13cff6de65a4ddc859213247c98 /fs/bcachefs/btree_iter.h | |
| parent | 3ebfc8fe95c5ec560d2d5c7e7bef62ebaa33a9c4 (diff) | |
bcachefs: allocate_dropping_locks()
Add two new helpers for allocating memory with btree locks held: The
idea is to first try the allocation with GFP_NOWAIT|__GFP_NOWARN, then
if that fails - unlock, retry with GFP_KERNEL, and then call
trans_relock().
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/btree_iter.h')
| -rw-r--r-- | fs/bcachefs/btree_iter.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/fs/bcachefs/btree_iter.h b/fs/bcachefs/btree_iter.h index 9676aa335b89..d2af3f38e6f5 100644 --- a/fs/bcachefs/btree_iter.h +++ b/fs/bcachefs/btree_iter.h @@ -859,6 +859,32 @@ __bch2_btree_iter_peek_upto_and_restart(struct btree_trans *trans, bch2_trans_unlock(_trans); \ _do ?: bch2_trans_relock(_trans); \ }) + +#define allocate_dropping_locks_errcode(_trans, _do) \ +({ \ + gfp_t _gfp = GFP_NOWAIT|__GFP_NOWARN; \ + int _ret = _do; \ + \ + if (bch2_err_matches(_ret, ENOMEM)) { \ + _gfp = GFP_KERNEL; \ + _ret = drop_locks_do(trans, _do); \ + } \ + _ret; \ +}) + +#define allocate_dropping_locks(_trans, _ret, _do) \ +({ \ + gfp_t _gfp = GFP_NOWAIT|__GFP_NOWARN; \ + typeof(_do) _p = _do; \ + \ + _ret = 0; \ + if (unlikely(!_p)) { \ + _gfp = GFP_KERNEL; \ + _ret = drop_locks_do(trans, ((_p = _do), 0)); \ + } \ + _p; \ +}) + /* new multiple iterator interface: */ void bch2_trans_updates_to_text(struct printbuf *, struct btree_trans *); |