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| author |   Eric Dumazet <edumazet@google.com> | 2020-06-17 20:53:22 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-06-18 20:46:23 -0700 |
| commit | 9c77b803f263573b6019e4828825709845c37d45 (patch) | |
| tree | 7873843d8ff6a13724e68b3bd4fa4ada0bd018e1 | |
| parent | octeontx2-af: change (struct qmem)->entry_sz from u8 to u16 (diff) | |
| download | linux-dev-9c77b803f263573b6019e4828825709845c37d45.tar.xz linux-dev-9c77b803f263573b6019e4828825709845c37d45.zip | |
net: tso: double TSO_HEADER_SIZE value
Transport header size could be 60 bytes, and network header
size can also be 60 bytes. Add the Ethernet header and we
are above 128 bytes.
Since drivers using net/core/tso.c usually allocates
one DMA coherent piece of memory per TX queue, this patch
might cause issues if a driver was using too many slots.
For 1024 slots, we would need 256 KB of physically
contiguous memory instead of 128 KB.
Alternative fix would be to add checks in the fast path,
but this involves more work in all drivers using net/core/tso.c.
Fixes: f9cbe9a556af ("net: define the TSO header size in net/tso.h")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/net/tso.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/tso.h b/include/net/tso.h index 7e166a570349..c33dd00c161f 100644 --- a/include/net/tso.h +++ b/include/net/tso.h @@ -4,7 +4,7 @@ #include <net/ip.h> -#define TSO_HEADER_SIZE 128 +#define TSO_HEADER_SIZE 256 struct tso_t { int next_frag_idx; |