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From: Thomas Monjalon <thomas@monjalon.net>
To: Renata Saiakhova <Renata.Saiakhova@ekinops.com>
Cc: dev@dpdk.org, ferruh.yigit@intel.com, arybchenko@solarflare.com
Subject: Re: [dpdk-dev] [PATCH 0/2] Memory corruption due to HW rings allocation
Date: Tue, 05 May 2020 13:01:30 +0200	[thread overview]
Message-ID: <2456587.k3LOHGUjKi@thomas> (raw)
In-Reply-To: <20200503162636.5233-1-Renata.Saiakhova@ekinops.com>

03/05/2020 18:26, Renata Saiakhova:
> igb and ixgbe drivers allocate HW rings using rte_eth_dma_zone_reserve(),
> which checks first if the memzone exists for a given name, consisting of port
> id, queue_id, rx/tx direction, but not for the size, alignment, and socket_id.
> If the memzone with a given name exists it is returned, otherwise it is
> allocated.
> Disconnecting dpdk port from one type of interface (igb) and connecting it
> to another type of interface (ixgbe) for the same port id, potentially creates
> memory overlap and corruption, because it may require memzone of bigger size.
> That's what is happening from switching from igb to ixgbe having the same port
> id.

I don't understand the use case.
Do you mean you close one port and open another one,
so the port id is recycled by ethdev?

Please could you elaborate with some code snippet?



  parent reply	other threads:[~2020-05-05 11:01 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-03 16:26 Renata Saiakhova
2020-05-03 16:26 ` [dpdk-dev] [PATCH 1/2] librte_ethdev: Introduce a function to release HW rings Renata Saiakhova
2020-05-05 10:25   ` Burakov, Anatoly
2020-05-05 10:45     ` Burakov, Anatoly
2020-05-05 12:49       ` Renata Saiakhova
2020-05-05 13:36         ` Burakov, Anatoly
2020-05-05 15:47   ` Lukasz Wojciechowski
2020-05-05 17:25     ` Renata Saiakhova
2020-05-05 17:31       ` Lukasz Wojciechowski
2020-05-06 10:14       ` Burakov, Anatoly
2020-05-03 16:26 ` [dpdk-dev] [PATCH 2/2] drivers/net: Fix in e1000 and ixgbe HW rings memory overlap Renata Saiakhova
2020-05-05 10:28   ` Burakov, Anatoly
2020-05-05 10:59     ` Thomas Monjalon
2020-05-05 11:36       ` Burakov, Anatoly
2020-05-05 11:01 ` Thomas Monjalon [this message]
2020-05-05 11:19   ` [dpdk-dev] [PATCH 0/2] Memory corruption due to HW rings allocation Renata Saiakhova
2020-05-05 12:35     ` Thomas Monjalon

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