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From: Renata Saiakhova <Renata.Saiakhova@ekinops.com>
Cc: dev@dpdk.org, Renata Saiakhova <Renata.Saiakhova@ekinops.com>
Subject: [dpdk-dev] [PATCH v5 0/1] eal/interrupts: add synchronous wrapper around unregister
Date: Tue,  6 Apr 2021 16:46:13 +0200
Message-ID: <20210406144614.3394-1-Renata.Saiakhova@ekinops.com> (raw)

For pci_vfio, while removing the device by rte_dev_remove(),
pci_vfio_disable_notifier() will call rte_intr_callback_unregister(),
which may return -EAGAIN, if an interrupt source (kernel) has some active
callbacks right now. As a result, the callback (req notifier) can be never unregistered,
and the corresponding descriptor (vfio_req_intr_handle.fd) can be never closed.
The kernel will continuously try to notify the user space using req notifier, but as
the device is already removed, in this case it even cannot find a bus for that
device, the log is full of messages "EAL: Cannot find bus for device (XX:XX.X)"

  Re-spin with windows update and 21.05 edition
* Typo spelling in commit message
* Subject line reworded
* Use only for pci-vfio in pci_vfio_disable_notifier()

Renata Saiakhova (1):
  eal/interrupts: add synchronous wrapper around unregister

 drivers/bus/pci/linux/pci_vfio.c        |  2 +-
 lib/librte_eal/freebsd/eal_interrupts.c | 12 ++++++++++++
 lib/librte_eal/include/rte_interrupts.h | 25 +++++++++++++++++++++++++
 lib/librte_eal/linux/eal_interrupts.c   | 12 ++++++++++++
 lib/librte_eal/version.map              |  1 +
 lib/librte_eal/windows/eal_interrupts.c |  8 ++++++++
 6 files changed, 59 insertions(+), 1 deletion(-)


             reply	other threads:[~2021-04-06 14:50 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-06 14:46 Renata Saiakhova [this message]
2021-04-06 14:46 ` [dpdk-dev] [PATCH v5 1/1] " Renata Saiakhova
2021-04-07  9:12   ` David Marchand

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