On 07/28/2015 07:02 PM, Alexei Starovoitov wrote:
On 7/28/15 6:26 AM, Daniel Borkmann wrote:
After patch, disassembly:
[...]
9e: lea 0x80(%rsi,%rdx,8),%rax <--- CONFIG_LOCKDEP/CONFIG_LOCK_STAT
48 8d 84 d6 80 00 00 00
a6: mov (%rax),%rax
48 8b 00
[...]
[...]
9e: lea 0x50(%rsi,%rdx,8),%rax <--- No CONFIG_LOCKDEP
48 8d 84 d6 50 00 00 00
a6: mov (%rax),%rax
48 8b 00
[...]
Fixes: b52f00e6a715 ("x86: bpf_jit: implement bpf_tail_call() helper")
Signed-off-by: Daniel Borkmann<dan...@iogearbox.net>
Thanks for fixing it.
No problem!
Most of my development is actually with LOCKDEP on, but I don't ever
turn LOCK_STAT on, so sadly missed this 48 byte increase of 80 byte
structure :(
I feel that at some point we might have hit this anyway, e.g. Huawei
guys with their perf work further extending bpf_maps, etc, etc.
Thanks,
Daniel
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