unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
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bcachefs: Reallocate table when we're increasing size

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Fixes: c2f6e16a67 ("bcachefs: Increase size of cuckoo hash table on too many rehashes")
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-08-17 19:51:13 -04:00
parent 0e49d3ff12
commit d6d539c9a7
1 changed files with 3 additions and 1 deletions
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4
fs/bcachefs/buckets_waiting_for_journal.c
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@ -107,7 +107,7 @@ int bch2_set_bucket_needs_journal_commit(struct buckets_waiting_for_journal *b,
nr_elements += t->d[i].journal_seq > flushed_seq;
new_bits = ilog2(roundup_pow_of_two(nr_elements * 3));
realloc:
n = kvmalloc(sizeof(*n) + (sizeof(n->d[0]) << new_bits), GFP_KERNEL);
if (!n) {
ret = -BCH_ERR_ENOMEM_buckets_waiting_for_journal_set;
@ -118,6 +118,8 @@ int bch2_set_bucket_needs_journal_commit(struct buckets_waiting_for_journal *b,
if (nr_rehashes_this_size == 3) {
new_bits++;
nr_rehashes_this_size = 0;
kvfree(n);
goto realloc;
}
nr_rehashes++;