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bcachefs: Use one buffer for sorting whiteouts 

We're not really supposed to allocate from the same mempool more than
once.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2019-12-14 15:55:29 -05:00 committed by Kent Overstreet
parent c297a763e2
commit 8f82280ea3
1 changed files with 12 additions and 11 deletions
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23
fs/bcachefs/btree_io.c
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@ -118,30 +118,32 @@ static void sort_bkey_ptrs(const struct btree *bt,
static void bch2_sort_whiteouts(struct bch_fs *c, struct btree *b)
{
struct bkey_packed *new_whiteouts, **whiteout_ptrs, *k;
bool used_mempool1 = false, used_mempool2 = false;
unsigned order, i, nr = 0;
struct bkey_packed *new_whiteouts, **ptrs, **ptrs_end, *k;
bool used_mempool = false;
unsigned order;
if (!b->whiteout_u64s)
return;
order = get_order(b->whiteout_u64s * sizeof(u64));
new_whiteouts = btree_bounce_alloc(c, order, &used_mempool1);
whiteout_ptrs = btree_bounce_alloc(c, order, &used_mempool2);
new_whiteouts = btree_bounce_alloc(c, order, &used_mempool);
ptrs = ptrs_end = ((void *) new_whiteouts + (PAGE_SIZE << order));
for (k = unwritten_whiteouts_start(c, b);
k != unwritten_whiteouts_end(c, b);
k = bkey_next(k))
whiteout_ptrs[nr++] = k;
*--ptrs = k;
sort_bkey_ptrs(b, whiteout_ptrs, nr);
sort_bkey_ptrs(b, ptrs, ptrs_end - ptrs);
k = new_whiteouts;
for (i = 0; i < nr; i++) {
bkey_copy(k, whiteout_ptrs[i]);
while (ptrs != ptrs_end) {
bkey_copy(k, *ptrs);
k = bkey_next(k);
ptrs++;
}
verify_no_dups(b, new_whiteouts,
@ -150,8 +152,7 @@ static void bch2_sort_whiteouts(struct bch_fs *c, struct btree *b)
memcpy_u64s(unwritten_whiteouts_start(c, b),
new_whiteouts, b->whiteout_u64s);
btree_bounce_free(c, order, used_mempool2, whiteout_ptrs);
btree_bounce_free(c, order, used_mempool1, new_whiteouts);
btree_bounce_free(c, order, used_mempool, new_whiteouts);
}
static bool should_compact_bset(struct btree *b, struct bset_tree *t,