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bcachefs: Fix incorrectly freeing btree_path in alloc path

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Clearing path->preserve means the path will be dropping in
bch2_trans_begin() - but on transaction restart, we're likely to need
that path again.

This fixes a livelock in the allocation path.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
This commit is contained in:
Kent Overstreet 2022-08-05 17:08:35 -04:00 committed by Kent Overstreet
parent 86b7445193
commit 17047fbced
1 changed files with 2 additions and 1 deletions
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3
fs/bcachefs/btree_iter.h
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@ -335,7 +335,8 @@ void bch2_trans_copy_iter(struct btree_iter *, struct btree_iter *);
static inline void set_btree_iter_dontneed(struct btree_iter *iter)
{
iter->path->preserve = false;
if (!iter->trans->restarted)
iter->path->preserve = false;
}
void *bch2_trans_kmalloc(struct btree_trans *, size_t);