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scoutfs: align items in item cache to 8 bytes

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This will ensure structs, which are internally 8 byte aligned, will remain
so when in the item cache.

16 bytes alignment doesn't seem like it's needed so just do 8.

Signed-off-by: Andy Grover <agrover@versity.com>
This commit is contained in:
Andy Grover
2020-10-29 14:15:33 -07:00
committed by Zach Brown
parent 87cb971630
commit 68d7a2e2cb
1 changed files with 3 additions and 3 deletions
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kmod/src/item.c
+3 -3
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@@ -145,11 +145,11 @@ struct cached_item {
char val[0];
};
#define CACHED_ITEM_ALIGN 16
#define CACHED_ITEM_ALIGN 8
static int item_val_bytes(int val_len)
{
return offsetof(struct cached_item, val[val_len]);
return round_up(offsetof(struct cached_item, val[val_len]), CACHED_ITEM_ALIGN);
}
/*
@@ -400,7 +400,7 @@ static struct cached_item *alloc_item(struct cached_page *pg,
return NULL;
item = page_address(pg->page) + pg->page_off;
pg->page_off += round_up(item_val_bytes(val_len), CACHED_ITEM_ALIGN);
pg->page_off += item_val_bytes(val_len);
RB_CLEAR_NODE(&item->node);
INIT_LIST_HEAD(&item->dirty_head);