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| author | Doron Roberts-Kedes <doronrk@fb.com> | 2018-06-06 09:33:28 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-06-06 14:07:53 -0400 |
| commit | 7170e6045a6a8b33f4fa5753589dc77b16198e2d (patch) | |
| tree | d0b3c5b6035ce9ca8ef2fbfc01964221be142441 /net | |
| parent | fb1967a69f756073362b8f19347f863f227320ad (diff) | |
| download | linux-0-day-7170e6045a6a8b33f4fa5753589dc77b16198e2d.tar.gz linux-0-day-7170e6045a6a8b33f4fa5753589dc77b16198e2d.tar.xz | |
strparser: Add __strp_unpause and use it in ktls.
strp_unpause queues strp_work in order to parse any messages that
arrived while the strparser was paused. However, the process invoking
strp_unpause could eagerly parse a buffered message itself if it held
the sock lock.
__strp_unpause is an alternative to strp_pause that avoids the scheduling
overhead that results when a receiving thread unpauses the strparser
and waits for the next message to be delivered by the workqueue thread.
This patch more than doubled the IOPS achieved in a benchmark of NBD
traffic encrypted using ktls.
Signed-off-by: Doron Roberts-Kedes <doronrk@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/strparser/strparser.c | 13 | ||||
| -rw-r--r-- | net/tls/tls_sw.c | 2 |
2 files changed, 14 insertions, 1 deletions
diff --git a/net/strparser/strparser.c b/net/strparser/strparser.c index 092bebc700483..1a96951835999 100644 --- a/net/strparser/strparser.c +++ b/net/strparser/strparser.c @@ -512,6 +512,19 @@ int strp_init(struct strparser *strp, struct sock *sk, } EXPORT_SYMBOL_GPL(strp_init); +/* Sock process lock held (lock_sock) */ +void __strp_unpause(struct strparser *strp) +{ + strp->paused = 0; + + if (strp->need_bytes) { + if (strp_peek_len(strp) < strp->need_bytes) + return; + } + strp_read_sock(strp); +} +EXPORT_SYMBOL_GPL(__strp_unpause); + void strp_unpause(struct strparser *strp) { strp->paused = 0; diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c index 839e1e165a0c6..8ca57d01b18f6 100644 --- a/net/tls/tls_sw.c +++ b/net/tls/tls_sw.c @@ -735,7 +735,7 @@ static bool tls_sw_advance_skb(struct sock *sk, struct sk_buff *skb, /* Finished with message */ ctx->recv_pkt = NULL; kfree_skb(skb); - strp_unpause(&ctx->strp); + __strp_unpause(&ctx->strp); return true; } |