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From: David Marchand <david.marchand@redhat.com>
To: Yasufumi Ogawa <yasufum.o@gmail.com>
Cc: "Burakov, Anatoly" <anatoly.burakov@intel.com>,
	 "Ananyev, Konstantin" <konstantin.ananyev@intel.com>,
	dev <dev@dpdk.org>,  dpdk stable <stable@dpdk.org>,
	Yasufumi Ogawa <ogawa.yasufumi@lab.ntt.co.jp>
Subject: Re: [dpdk-dev] [PATCH v7 1/1] fbarray: fix duplicated fbarray file in secondary
Date: Thu, 14 Nov 2019 13:27:56 +0100
Message-ID: <CAJFAV8zZ91f05mbw5jnDiOoWD7_TLVag_r4F-2x+=Ydn0zf-VA@mail.gmail.com> (raw)
In-Reply-To: <61dd1730-3c80-da57-126d-84596b23ff31@gmail.com>

On Thu, Nov 14, 2019 at 12:42 PM Yasufumi Ogawa <yasufum.o@gmail.com> wrote:
>
> On 2019/11/14 2:01, Burakov, Anatoly wrote:
> > On 13-Nov-19 9:43 PM, yasufum.o@gmail.com wrote:
> >> From: Yasufumi Ogawa <ogawa.yasufumi@lab.ntt.co.jp>
> >>
> >> In secondary_msl_create_walk(), it creates a file for fbarrays with its
> >> PID for reserving unique name among secondary processes. However, it
> >> does not work if several secondaries run as app containers because each
> >> of containerized secondary has PID 1, and failed to reserve unique name
> >> other than first one. To reserve unique name in each of containers, use
> >> hostname in addition to PID.
> >>
> >> Cc: stable@dpdk.org
> >>
> >> Signed-off-by: Yasufumi Ogawa <yasufum.o@gmail.com>
> >> ---
> >>   lib/librte_eal/linux/eal/eal_memalloc.c | 16 +++++++++++++---
> >>   1 file changed, 13 insertions(+), 3 deletions(-)
> >>
> >> diff --git a/lib/librte_eal/linux/eal/eal_memalloc.c
> >> b/lib/librte_eal/linux/eal/eal_memalloc.c
> >> index af6d0d023..11de6d4d6 100644
> >> --- a/lib/librte_eal/linux/eal/eal_memalloc.c
> >> +++ b/lib/librte_eal/linux/eal/eal_memalloc.c
> >> @@ -1365,6 +1365,12 @@ secondary_msl_create_walk(const struct
> >> rte_memseg_list *msl,
> >>       struct rte_memseg_list *primary_msl, *local_msl;
> >>       char name[PATH_MAX];
> >>       int msl_idx, ret;
> >> +    char hostname[HOST_NAME_MAX+1] = { 0 };
> >> +    /* filename of secondary's fbarray is defined such as
> >> +     * "fbarray_memseg-1048576k-0-0_PID_HOSTNAME" and length of PID
> >> +     * can be 7 digits maximumly.
> >> +     */
> >> +    int fbarray_sec_name_len = 32 + 7 + 1 + HOST_NAME_MAX + 1;
> >
> > What does 32 stand for? Maybe #define both 32 and 7 values?
> Hi Anatoly,
>
> Thank you for your comments! If my understanding is correct, the prefix
> "fbarray_memseg-1048576k-0-0_" is 28 digits and it could be larger if
> using the size of hugepage or the number of NUMA nodes are larger
> possibly. However, I think 32 digits is still enough.
>
>  > Maybe #define both 32 and 7 values?
> Yes. I think it should be better to use #define if this values are
> referred several times.


We can truncate to RTE_FBARRAY_NAME_LEN in all cases.
And iiuc, rte_fbarray_init will refuse any longer name anyway.


-- 
David Marchand


  reply index

Thread overview: 62+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-16  1:59 [dpdk-dev] [PATCH] fbarray: get fbarrays from containerized secondary ogawa.yasufumi
2019-04-16  3:43 ` [dpdk-dev] [PATCH v2 0/1] Get " ogawa.yasufumi
2019-04-16  3:43   ` [dpdk-dev] [PATCH v2 1/1] fbarray: get " ogawa.yasufumi
2019-07-04 20:17     ` Thomas Monjalon
2019-07-05  8:53     ` Burakov, Anatoly
2019-07-09 10:22       ` Yasufumi Ogawa
2019-07-09 10:24         ` Burakov, Anatoly
2019-07-09 10:26           ` Burakov, Anatoly
2019-07-11  9:37             ` Yasufumi Ogawa
2019-07-11  9:43               ` Burakov, Anatoly
2019-07-11 10:31 ` [dpdk-dev] [PATCH v3 0/1] " yasufum.o
2019-07-11 10:31   ` [dpdk-dev] [PATCH v3 1/1] " yasufum.o
2019-07-11 10:53     ` Burakov, Anatoly
2019-07-11 11:57       ` Yasufumi Ogawa
2019-07-11 13:14         ` Burakov, Anatoly
2019-07-12  2:22           ` Yasufumi Ogawa
2019-07-22  1:06             ` Ogawa Yasufumi
2019-07-22  9:33               ` Burakov, Anatoly
2019-07-22  9:25             ` Burakov, Anatoly
2019-07-24  8:20   ` [dpdk-dev] [PATCH v4 0/1] " yasufum.o
2019-07-24  8:20     ` [dpdk-dev] [PATCH v4 1/1] " yasufum.o
2019-07-24  9:59       ` Burakov, Anatoly
2019-07-30  8:16         ` [dpdk-dev] [dpdk-stable] " Thomas Monjalon
2019-07-30  9:18           ` Burakov, Anatoly
2019-07-31  5:48             ` Yasufumi Ogawa
2019-10-11  9:36       ` [dpdk-dev] " David Marchand
2019-10-25 15:36         ` David Marchand
2019-10-25 19:54           ` Yasufumi Ogawa
2019-10-26 16:15             ` David Marchand
2019-10-26 18:11               ` Yasufumi Ogawa
2019-10-28  8:07     ` [dpdk-dev] [PATCH v5 0/1] fbarray: fix duplicated fbarray file in secondary yasufum.o
2019-10-28  8:07       ` [dpdk-dev] [PATCH v5 1/1] " yasufum.o
2019-10-29 12:03         ` Ananyev, Konstantin
2019-10-30 13:42           ` Yasufumi Ogawa
2019-10-30 19:00             ` Ananyev, Konstantin
2019-10-31 10:03               ` Yasufumi Ogawa
2019-10-31 10:32                 ` Ananyev, Konstantin
2019-11-01  9:04     ` [dpdk-dev] [PATCH v6 0/1] " yasufum.o
2019-11-01  9:04       ` [dpdk-dev] [PATCH v6 1/1] " yasufum.o
2019-11-01 12:01         ` Ananyev, Konstantin
2019-11-04 10:20         ` Burakov, Anatoly
2019-11-05 10:13           ` David Marchand
2019-11-05 11:31             ` Burakov, Anatoly
2019-11-05 11:41               ` Ananyev, Konstantin
2019-11-06 10:37                 ` Burakov, Anatoly
2019-11-08  3:19                   ` Yasufumi Ogawa
2019-11-13 21:43     ` [dpdk-dev] [PATCH v7 0/1] " yasufum.o
2019-11-13 21:43       ` [dpdk-dev] [PATCH v7 1/1] " yasufum.o
2019-11-14 10:01         ` Burakov, Anatoly
2019-11-14 11:42           ` Yasufumi Ogawa
2019-11-14 12:27             ` David Marchand [this message]
2019-11-26 19:40               ` Yasufumi Ogawa
2019-11-27 10:26                 ` Burakov, Anatoly
2019-11-29  5:44                   ` Yasufumi Ogawa
2019-12-02 10:43                     ` Burakov, Anatoly
2019-12-05 20:13                       ` Yasufumi Ogawa
2019-11-14 12:55         ` David Marchand
2019-11-14 17:32         ` Ananyev, Konstantin
2019-11-27  8:48       ` [dpdk-dev] [PATCH v8 0/1] " Yasufumi Ogawa
2019-11-27  8:48         ` [dpdk-dev] [PATCH v8 1/1] " Yasufumi Ogawa
2019-12-06 10:44           ` Burakov, Anatoly
2019-12-06 13:18             ` Yasufumi Ogawa

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