patches for DPDK stable branches
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From: Slava Ovsiienko <viacheslavo@nvidia.com>
To: Kevin Traynor <ktraynor@redhat.com>, "stable@dpdk.org" <stable@dpdk.org>
Cc: "mohsinshaikh@niometrics.com" <mohsinshaikh@niometrics.com>
Subject: Re: [dpdk-stable] [PATCH] [18.11] net/mlx5: use open/read/close for ib stats query
Date: Tue, 8 Dec 2020 12:41:44 +0000
Message-ID: <MWHPR12MB150108F7140E648A57BA965DDFCD0@MWHPR12MB1501.namprd12.prod.outlook.com> (raw)
In-Reply-To: <9994347b-c239-8783-48ff-07d3185ebdc5@redhat.com>

OK, so, should I resend v2 with:
- no From: tag
- add [ upstream commit 00437823cb80b8fa87dbe61becc07bd42ee98549 ]

With best regards, Slava

> -----Original Message-----
> From: Kevin Traynor <ktraynor@redhat.com>
> Sent: Tuesday, December 8, 2020 14:07
> To: Slava Ovsiienko <viacheslavo@nvidia.com>; stable@dpdk.org
> Cc: mohsinshaikh@niometrics.com
> Subject: Re: [PATCH] [18.11] net/mlx5: use open/read/close for ib stats query
> 
> On 08/12/2020 11:34, Viacheslav Ovsiienko wrote:
> > From: Mohsin Shaikh <mohsinshaikh@niometrics.com>
> >
> > From: Mohsin Shaikh <mohsinshaikh@niometrics.com>
> >
> 
> Hi Slava, your patches are putting in duplicate From: tags ^ and missing
> upstream commit ids. Please add upstream commit ids so I don't have to find it
> for every patch. i.e.
> 
> [ upstream commit 00437823cb80b8fa87dbe61becc07bd42ee98549 ]
> 
> > fgets(3)/fread(3)/fscanf(3) etc. use mmap(2)/munmap(2) which leads to
> > TLB shutdown interrupts to all DPDK app cores including RX cores.
> > This can cause packet drops. Use read(2)/write(2) instead.
> >
> > Bugzilla ID: 440
> > Cc: stable@dpdk.org
> >
> 
> We can drop the stable tag as it's targetted to LTS branch anyway
> 
> > Signed-off-by: Mohsin Shaikh <mohsinshaikh@niometrics.com>
> > Reviewed-by: Alexander Kozyrev <akozyrev@mellanox.com>
> > Acked-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
> > ---
> >  drivers/net/mlx5/mlx5_stats.c | 21 ++++++++++++++-------
> >  1 file changed, 14 insertions(+), 7 deletions(-)
> >
> > diff --git a/drivers/net/mlx5/mlx5_stats.c
> > b/drivers/net/mlx5/mlx5_stats.c index 6906dc8..0b1fe3d 100644
> > --- a/drivers/net/mlx5/mlx5_stats.c
> > +++ b/drivers/net/mlx5/mlx5_stats.c
> > @@ -3,11 +3,13 @@
> >   * Copyright 2015 Mellanox Technologies, Ltd
> >   */
> >
> > +#include <fcntl.h>
> >  #include <inttypes.h>
> >  #include <linux/sockios.h>
> >  #include <linux/ethtool.h>
> >  #include <stdint.h>
> >  #include <stdio.h>
> > +#include <unistd.h>
> >
> >  #include <rte_ethdev_driver.h>
> >  #include <rte_common.h>
> > @@ -139,19 +141,24 @@
> >  static inline void
> >  mlx5_read_ib_stat(struct mlx5_priv *priv, const char *ctr_name,
> > uint64_t *stat)  {
> > -	FILE *file;
> > +	int fd;
> > +
> >  	MKSTR(path, "%s/ports/1/hw_counters/%s",
> >  		  priv->ibdev_path,
> >  		  ctr_name);
> >
> > -	file = fopen(path, "rb");
> > -	if (file) {
> > -		int n = fscanf(file, "%" SCNu64, stat);
> > +	fd = open(path, O_RDONLY);
> > +	if (fd != -1) {
> > +		char buf[21] = {'\0'};
> > +		ssize_t n = read(fd, buf, sizeof(buf));
> >
> > -		fclose(file);
> > -		if (n != 1)
> > -			stat = 0;
> > +		close(fd);
> > +		if (n != -1) {
> > +			*stat = strtoull(buf, NULL, 10);
> > +			return;
> > +		}
> >  	}
> > +	*stat = 0;
> >  }
> >
> >  /**
> >


  reply	other threads:[~2020-12-08 12:41 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-08 11:34 Viacheslav Ovsiienko
2020-12-08 12:06 ` Kevin Traynor
2020-12-08 12:41   ` Slava Ovsiienko [this message]
2020-12-08 12:52     ` Kevin Traynor
  -- strict thread matches above, loose matches on Subject: below --
2020-06-17  7:18 [dpdk-stable] [PATCH 18.11] " Mohsin Shaikh

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