From: "Björn Töpel" <bjorn@kernel.org>
To: ast@kernel.org, daniel@iogearbox.net, netdev@vger.kernel.org,
bpf@vger.kernel.org
Cc: "Björn Töpel" <bjorn@kernel.org>, linux-riscv@lists.infradead.org
Subject: [PATCH bpf-next 1/4] riscv, bpf: Increase the maximum number of iterations
Date: Thu, 28 Oct 2021 15:20:38 +0200 [thread overview]
Message-ID: <20211028132041.516820-2-bjorn@kernel.org> (raw)
In-Reply-To: <20211028132041.516820-1-bjorn@kernel.org>
Now that BPF programs can be up to 1M instructions, it is not uncommon
that a program requires more than the current 16 iterations to
converge.
Bump it to 32, which is enough for selftests/bpf, and test_bpf.ko.
Signed-off-by: Björn Töpel <bjorn@kernel.org>
---
arch/riscv/net/bpf_jit_core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/riscv/net/bpf_jit_core.c b/arch/riscv/net/bpf_jit_core.c
index 7ccc809f2c19..ef9fcf6ea749 100644
--- a/arch/riscv/net/bpf_jit_core.c
+++ b/arch/riscv/net/bpf_jit_core.c
@@ -11,7 +11,7 @@
#include "bpf_jit.h"
/* Number of iterations to try until offsets converge. */
-#define NR_JIT_ITERATIONS 16
+#define NR_JIT_ITERATIONS 32
static int build_body(struct rv_jit_context *ctx, bool extra_pass, int *offset)
{
--
2.32.0
next prev parent reply other threads:[~2021-10-28 13:20 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-28 13:20 [PATCH bpf-next 0/4] Various RISC-V BPF improvements Björn Töpel
2021-10-28 13:20 ` Björn Töpel [this message]
2021-10-28 13:20 ` [PATCH bpf-next 2/4] tools build: Add RISC-V to HOSTARCH parsing Björn Töpel
2021-10-28 13:20 ` [PATCH bpf-next 3/4] riscv, libbpf: Add RISC-V (RV64) support to bpf_tracing.h Björn Töpel
2021-10-28 13:20 ` [PATCH bpf-next 4/4] selftests/bpf: Fix broken riscv build Björn Töpel
2021-10-28 15:58 ` Björn Töpel
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