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bcachefs: Fix fifo overflow in allocator startup

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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2019-01-22 20:04:06 -05:00 committed by Kent Overstreet
parent 7ef2a73a58
commit 5e5d9bdbb8
1 changed files with 24 additions and 0 deletions
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24
fs/bcachefs/alloc_background.c
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@ -1334,6 +1334,24 @@ static void allocator_start_issue_discards(struct bch_fs *c)
ca->mi.bucket_size, GFP_NOIO);
}
static int resize_free_inc(struct bch_dev *ca)
{
alloc_fifo free_inc;
if (!fifo_full(&ca->free_inc))
return 0;
if (!init_fifo(&free_inc,
ca->free_inc.size * 2,
GFP_KERNEL))
return -ENOMEM;
fifo_move(&free_inc, &ca->free_inc);
swap(free_inc, ca->free_inc);
free_fifo(&free_inc);
return 0;
}
static int __bch2_fs_allocator_start(struct bch_fs *c)
{
struct bch_dev *ca;
@ -1409,6 +1427,12 @@ not_enough:
while (!fifo_full(&ca->free[RESERVE_BTREE]) &&
(bu = next_alloc_bucket(ca)) >= 0) {
ret = resize_free_inc(ca);
if (ret) {
percpu_ref_put(&ca->io_ref);
return ret;
}
bch2_invalidate_one_bucket(c, ca, bu,
&journal_seq);