Re: [dpdk-stable] [EXT] RE: [dpdk-dev] [PATCH 1/1] eal/linux: fix event set error for rte_epoll_event

[wangyunjian <wangyunjian@huawei.com>]

> -----Original Message-----
> From: Harman Kalra [mailto:hkalra@marvell.com]
> Sent: Tuesday, September 22, 2020 6:32 PM
> To: wangyunjian <wangyunjian@huawei.com>
> Cc: dev@dpdk.org; david.marchand@redhat.com; ferruh.yigit@intel.com;
> Thomas Monjalon <thomas@monjalon.net>; Lilijun (Jerry)
> <jerry.lilijun@huawei.com>; xudingke <xudingke@huawei.com>;
> stable@dpdk.org
> Subject: Re: [EXT] RE: [dpdk-dev] [PATCH 1/1] eal/linux: fix event set error for
> rte_epoll_event
> 
> On Sat, Sep 19, 2020 at 10:42:30AM +0000, wangyunjian wrote:
> > External Email
> >
> > ----------------------------------------------------------------------
> > Friendly ping.
> 
> Hi Wang,
> 
>    I am sorry for the delay in review, I will surely complete the review
>    by end of this week.
>    Can you please elaborate on the specific case/scenario which caused
>    failure i.e. which lead you to this change.

EPOLLERR event will be triggered when an exception occurs. This event will be set
in 'evs.events', we should use 'evs.events' instead of 'rev->epdata.event' to assign
to 'events.epdata.event'. Otherwise, the EPOLLERR event will lost.

Thanks,
Yunjian

> 
> Thanks
> Harman
> 
> >
> > > -----Original Message-----
> > > From: wangyunjian
> > > Sent: Wednesday, August 26, 2020 6:56 PM
> > > To: dev@dpdk.org; hkalra@marvell.com; david.marchand@redhat.com
> > > Cc: 'ferruh.yigit@intel.com' <ferruh.yigit@intel.com>; 'Thomas Monjalon'
> > > <thomas@monjalon.net>; Lilijun (Jerry) <jerry.lilijun@huawei.com>;
> > > xudingke <xudingke@huawei.com>; stable@dpdk.org
> > > Subject: RE: [dpdk-dev] [PATCH 1/1] eal/linux: fix event set error
> > > for rte_epoll_event
> > >
> > > Ping for review, please.
> > >
> > > > -----Original Message-----
> > > > From: wangyunjian
> > > > Sent: Wednesday, July 15, 2020 10:40 AM
> > > > To: dev@dpdk.org; hkalra@marvell.com
> > > > Cc: Lilijun (Jerry) <jerry.lilijun@huawei.com>; xudingke
> > > > <xudingke@huawei.com>; wangyunjian <wangyunjian@huawei.com>;
> > > > stable@dpdk.org
> > > > Subject: [dpdk-dev] [PATCH 1/1] eal/linux: fix event set error for
> > > > rte_epoll_event
> > > >
> > > > From: Yunjian Wang <wangyunjian@huawei.com>
> > > >
> > > > The "rev->epdata.event" assigned to "events.epdata.event"
> > > > directly, which was wrong in case of epoll events. It should be set to the
> "evs.events".
> > > >
> > > > Fixes: 9efe9c6cdcac ("eal/linux: add epoll wrappers")
> > > > Cc: stable@dpdk.org
> > > >
> > > > Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
> > > > ---
> > > >  lib/librte_eal/linux/eal_interrupts.c | 2 +-
> > > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > >
> > > > diff --git a/lib/librte_eal/linux/eal_interrupts.c
> > > > b/lib/librte_eal/linux/eal_interrupts.c
> > > > index 13db5c4e8..8a3c95cec 100644
> > > > --- a/lib/librte_eal/linux/eal_interrupts.c
> > > > +++ b/lib/librte_eal/linux/eal_interrupts.c
> > > > @@ -1237,7 +1237,7 @@ eal_epoll_process_event(struct epoll_event
> > > > *evs, unsigned int n,
> > > >  		events[count].status        = RTE_EPOLL_VALID;
> > > >  		events[count].fd            = rev->fd;
> > > >  		events[count].epfd          = rev->epfd;
> > > > -		events[count].epdata.event  = rev->epdata.event;
> > > > +		events[count].epdata.event  = evs[i].events;
> > > >  		events[count].epdata.data   = rev->epdata.data;
> > > >  		if (rev->epdata.cb_fun)
> > > >  			rev->epdata.cb_fun(rev->fd,
> > > > --
> > > > 2.23.0
> > > >
> >