DPDK patches and discussions
 help / color / mirror / Atom feed
From: "Mohakud, Amiya Ranjan" <amohakud@rbbn.com>
To: "Burakov, Anatoly" <anatoly.burakov@intel.com>, dpdk-dev <dev@dpdk.org>
Subject: Re: [dpdk-dev] eal: DPDK: 18.11.6 version rte_eal_init() function cleans the runtime directory in 5.4.35 kernel
Date: Thu, 15 Oct 2020 14:43:15 +0000
Message-ID: <DM6PR03MB3547B1A6E139678008618F68B9020@DM6PR03MB3547.namprd03.prod.outlook.com> (raw)
In-Reply-To: <af096009-bf8c-500a-0a87-2c831f80fccc@intel.com>

The primary process does not clear the files ( e.g. /var/run/dpdk/rte/fbarray_*) in case of 4.19 kernel, since the flock() fails. I think, this is correct behavior, since secondary processes rely on those files for their memzone_init().
But in 5.4, the primary process clears these files, which cause secondary processes to fail.


From: Burakov, Anatoly <anatoly.burakov@intel.com>
Sent: 15 October 2020 19:23
To: Mohakud, Amiya Ranjan <amohakud@rbbn.com>; dpdk-dev <dev@dpdk.org>
Subject: Re: [dpdk-dev] eal: DPDK: 18.11.6 version rte_eal_init() function cleans the runtime directory in 5.4.35 kernel

________________________________
NOTICE: This email was received from an EXTERNAL sender
________________________________

On 15-Oct-20 2:26 PM, Mohakud, Amiya Ranjan wrote:
> Hi All,
> I'm facing one issue with DPDK-18.11.6 in EAL library. Please find the below problem statement.
>
> Problem Statement:
> I have one DPDK application using DPDK version 18.11.6 which works fine in 4.19 version kernel. The rte_eal_init() works fine and eal_clean_runtime_dir() does not remove the files present in dpdk run time directory, /var/run/dpdk/rte/.
> The same application when I am trying to run in 5.4.35 kernel, the rte_eal_init() behavior is different. eal_clean_runtime_dir() cleans up dpdk run time directory, as a result the secondary processes fail to come up. Basically the flock system call succeeds , return value is 0 which goes and deletes the files. And in 4.19 kernel the flcok system call fails.
>
> Note: This is the case with 5.3 kernel version .
>

I'm not quite sure what the issue is. The runtime dir is *supposed to*
be cleared when you're running a primary process, and is not supposed to
be cleared when you're running a secondary process. Are you expecting
for a *primary* process to not clear the runtime directory?

--
Thanks,
Anatoly

  reply	other threads:[~2020-10-15 14:43 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <DM6PR03MB3547EDC8BAAD1DA17AE4470EB9020@DM6PR03MB3547.namprd03.prod.outlook.com>
2020-10-15 13:26 ` Mohakud, Amiya Ranjan
2020-10-15 13:52   ` Burakov, Anatoly
2020-10-15 14:43     ` Mohakud, Amiya Ranjan [this message]
2020-10-15 15:08       ` Burakov, Anatoly
2020-10-15 16:07         ` Mohakud, Amiya Ranjan
2020-10-15 16:14           ` Mohakud, Amiya Ranjan
2020-10-15 18:01             ` Burakov, Anatoly
2020-10-15 18:34               ` Burakov, Anatoly
2020-10-16  5:34                 ` Mohakud, Amiya Ranjan
2020-10-22  7:12                   ` Mohakud, Amiya Ranjan
     [not found]                     ` <DM6PR03MB3547C263D4E20B3DD124AD43B91D0@DM6PR03MB3547.namprd03.prod.outlook.com>
2020-10-28  7:00                       ` Mohakud, Amiya Ranjan
2020-10-29 15:51                         ` Burakov, Anatoly
2020-10-29 17:10                           ` Burakov, Anatoly
2020-10-29 17:40                             ` Mohakud, Amiya Ranjan
2020-10-30 10:00                               ` Burakov, Anatoly
2021-01-04  7:53                                 ` Mohakud, Amiya Ranjan

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=DM6PR03MB3547B1A6E139678008618F68B9020@DM6PR03MB3547.namprd03.prod.outlook.com \
    --to=amohakud@rbbn.com \
    --cc=anatoly.burakov@intel.com \
    --cc=dev@dpdk.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

DPDK patches and discussions

This inbox may be cloned and mirrored by anyone:

	git clone --mirror https://inbox.dpdk.org/dev/0 dev/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 dev dev/ https://inbox.dpdk.org/dev \
		dev@dpdk.org
	public-inbox-index dev

Example config snippet for mirrors.
Newsgroup available over NNTP:
	nntp://inbox.dpdk.org/inbox.dpdk.dev


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git