From: David Miller <davem@davemloft.net>
To: arnd@arndb.de
Cc: kuznet@ms2.inr.ac.ru, yoshfuji@linux-ipv6.org,
edumazet@google.com, ncardwell@google.com, ycheng@google.com,
soheil@google.com, fw@strlen.de, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] tcp: avoid bogus warning in tcp_clean_rtx_queue
Date: Tue, 19 Sep 2017 15:01:46 -0700 (PDT) [thread overview]
Message-ID: <20170919.150146.960352165896854483.davem@davemloft.net> (raw)
In-Reply-To: <CAK8P3a3G78pqFsoimeNrKnPLOUYR+X1qzhbKyabn_tN4oZMLyQ@mail.gmail.com>
From: Arnd Bergmann <arnd@arndb.de>
Date: Tue, 19 Sep 2017 23:32:33 +0200
> On Tue, Sep 19, 2017 at 11:02 PM, David Miller <davem@davemloft.net> wrote:
>> What cpu did you test the object code generation upon and does that
>> cpu have branch prediction hints in the target you are building for?
>
> This was a randconfig build targetting ARMv5. I'm pretty sure that has
> no such hint instructions.
I just tested on sparc64 and it changed the branch prediction:
.L2157:
- brz,pn %i3, .L1898 ! first_ackt,
+ brz,pt %i2, .L1898 ! first_ackt,
mov -1, %o2 !, seq_rtt_us
prev parent reply other threads:[~2017-09-19 22:01 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-18 20:48 [PATCH] tcp: avoid bogus warning in tcp_clean_rtx_queue Arnd Bergmann
2017-09-19 21:02 ` David Miller
2017-09-19 21:32 ` Arnd Bergmann
2017-09-19 22:01 ` David Miller [this message]
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