On Wed, Jun 16, 2021 at 12:16:52PM +0300, Amit Klein wrote:
> Here is the patch (minus headers, description, etc. - I believe these
> can be copied as is from the 5.x patch, but not sure about the
> rules...). It can be applied to 4.14.236. If this is OK, I can move on
> to 4.9 and 4.4.
>
>
> net/ipv4/route.c | 41 ++++++++++++++++++++++++++++-------------
> 1 file changed, 28 insertions(+), 13 deletions(-)
>
> diff --git a/net/ipv4/route.c b/net/ipv4/route.c
> index 78d6bc61a1d8..022a2b748da3 100644
> --- a/net/ipv4/route.c
> +++ b/net/ipv4/route.c
> @@ -70,6 +70,7 @@
> #include <linux/types.h>
> #include <linux/kernel.h>
> #include <linux/mm.h>
> +#include <linux/memblock.h>
> #include <linux/string.h>
> #include <linux/socket.h>
> #include <linux/sockios.h>
> @@ -485,8 +486,10 @@ static void ipv4_confirm_neigh(const struct
> dst_entry *dst, const void *daddr)
> __ipv4_confirm_neigh(dev, *(__force u32 *)pkey);
> }
>
> -#define IP_IDENTS_SZ 2048u
> -
> +/* Hash tables of size 2048..262144 depending on RAM size.
> + * Each bucket uses 8 bytes.
> + */
> +static u32 ip_idents_mask __read_mostly;
> static atomic_t *ip_idents __read_mostly;
> static u32 *ip_tstamps __read_mostly;
>
> @@ -496,12 +499,16 @@ static u32 *ip_tstamps __read_mostly;
> */
> u32 ip_idents_reserve(u32 hash, int segs)
> {
> - u32 *p_tstamp = ip_tstamps + hash % IP_IDENTS_SZ;
> - atomic_t *p_id = ip_idents + hash % IP_IDENTS_SZ;
> - u32 old = ACCESS_ONCE(*p_tstamp);
> - u32 now = (u32)jiffies;
> + u32 bucket, old, now = (u32)jiffies;
> + atomic_t *p_id;
> + u32 *p_tstamp;
Your patch is corrupted and couldn't be applied if I wanted to :(
