linux-kernel - Re: [PATCH v3 2/2] lib/btree.c: add testcase for in-memory b+ tree

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Date:   Thu, 18 May 2017 18:51:36 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Leno Hou <lenohou@...il.com>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v3 2/2] lib/btree.c: add testcase for in-memory b+ tree

On Thu, May 18, 2017 at 4:41 PM, Leno Hou <lenohou@...il.com> wrote:
> Signed-off-by: Leno Hou <lenohou@...il.com>
> ---

Please, address my comments.
This version doesn't look modified anyhow.

>  lib/btree_test.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 77 insertions(+)
>  create mode 100644 lib/btree_test.c
>
> diff --git a/lib/btree_test.c b/lib/btree_test.c
> new file mode 100644
> index 0000000..90d9048
> --- /dev/null
> +++ b/lib/btree_test.c
> @@ -0,0 +1,77 @@
> +#include <linux/module.h>
> +#include <linux/kernel.h>
> +#include <linux/init.h>
> +#include <linux/btree.h>
> +#include <linux/types.h>
> +
> +#define NODES 24
> +
> +struct test_node {
> +       u32 key;
> +       u32 val;
> +};
> +
> +static struct btree_head32 bh;
> +static struct test_node nodes[NODES];
> +
> +static void init(void)
> +{
> +       int i;
> +
> +       for (i = 0; i < NODES; i++) {
> +               nodes[i].key = i;
> +               nodes[i].val = i;
> +       }
> +}
> +static int __init btree_test_init(void)
> +{
> +       u32 key = 0;
> +       u32 *val = NULL;
> +       int i, rc;
> +
> +       pr_alert("btree testing\n");
> +
> +       init();
> +       rc = btree_init32(&bh);
> +
> +       if (rc)
> +               pr_alert("Unable initialize btree memory\n");
> +
> +       for (i = 0; i < NODES; i++) {
> +               rc = btree_insert32(&bh,
> +                               nodes[i].key,
> +                               &nodes[i].val,
> +                               GFP_ATOMIC);
> +
> +               if (rc)
> +                       pr_alert("Unable to insert key into btree\n");
> +       }
> +
> +       pr_alert("========================================\n");
> +
> +       btree_for_each_safe32(&bh, key, val) {
> +               pr_alert("val %d\n", *val);
> +       }
> +
> +       btree_remove32(&bh, 11);
> +
> +       pr_alert("========================================\n");
> +       btree_for_each_safe32(&bh, key, val) {
> +               pr_alert("val %d\n", *val);
> +       }
> +
> +       return 0;
> +}
> +static void __exit btree_test_exit(void)
> +{
> +       pr_alert("test exit\n");
> +       btree_destroy32(&bh);
> +
> +}
> +
> +module_init(btree_test_init);
> +module_exit(btree_test_exit);
> +
> +MODULE_LICENSE("Dual BSD/GPL");
> +MODULE_AUTHOR("Leno Hou <lenohou@...i.com>");
> +MODULE_DESCRIPTION("Simple In-memory B+ Tree test");
> --
> 2.7.4
>



-- 
With Best Regards,
Andy Shevchenko