From: Eric Dumazet <eric.dumazet@gmail.com>
To: Ingo Molnar <mingo@kernel.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Peter Zijlstra <peterz@infradead.org>
Cc: "Paul E . McKenney" <paulmck@kernel.org>,
Boqun Feng <boqun.feng@gmail.com>,
Arjun Roy <arjunroy@google.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
Eric Dumazet <edumazet@google.com>,
Eric Dumazet <eric.dumazet@gmail.com>
Subject: [PATCH v3 0/3] rseq: minor optimizations
Date: Tue, 13 Apr 2021 13:33:49 -0700 [thread overview]
Message-ID: <20210413203352.71350-1-eric.dumazet@gmail.com> (raw)
From: Eric Dumazet <edumazet@google.com>
rseq is a heavy user of copy to/from user data in fast paths.
This series tries to reduce the cost.
v3: Third patch going back to v1 (only deal with 64bit arches)
v2: Addressed Peter and Mathieu feedbacks, thanks !
Eric Dumazet (3):
rseq: optimize rseq_update_cpu_id()
rseq: remove redundant access_ok()
rseq: optimise rseq_get_rseq_cs() and clear_rseq_cs()
kernel/rseq.c | 29 +++++++++++++++++++++--------
1 file changed, 21 insertions(+), 8 deletions(-)
--
2.31.1.295.g9ea45b61b8-goog
next reply other threads:[~2021-04-13 20:33 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-13 20:33 Eric Dumazet [this message]
2021-04-13 20:33 ` [PATCH v3 1/3] rseq: optimize rseq_update_cpu_id() Eric Dumazet
2021-04-15 8:37 ` [tip: sched/core] rseq: Optimize rseq_update_cpu_id() tip-bot2 for Eric Dumazet
2021-04-13 20:33 ` [PATCH v3 2/3] rseq: remove redundant access_ok() Eric Dumazet
2021-04-15 8:37 ` [tip: sched/core] rseq: Remove " tip-bot2 for Eric Dumazet
2021-04-13 20:33 ` [PATCH v3 3/3] rseq: optimise rseq_get_rseq_cs() and clear_rseq_cs() Eric Dumazet
2021-04-15 8:37 ` [tip: sched/core] rseq: Optimise " tip-bot2 for Eric Dumazet
2021-04-13 20:40 ` [PATCH v3 0/3] rseq: minor optimizations Mathieu Desnoyers
2021-04-14 7:51 ` Peter Zijlstra
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