All of lore.kernel.org
 help / color / mirror / Atom feed
From: Sagi Grimberg <sagi-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org>
To: Steve Wise
	<swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>,
	Chuck Lever <chuck.lever-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>,
	Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
Cc: "linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
	<linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH] IB/core: Don't drain the receive queue for srq attached queue-pair
Date: Tue, 26 Apr 2016 22:18:00 +0300	[thread overview]
Message-ID: <571FBEE8.20009@grimberg.me> (raw)
In-Reply-To: <571F9084.2040506-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>


>>> On Apr 26, 2016, at 11:43 AM, Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org> wrote:
>>>
>>> Just curious: what takes care of draining SRQs when we unregister them
>>> after all queues are gone?
>>
>> Conversely, I would think that a consumer that uses SRQ
>> would want a similar drain mechanism to guarantee there
>> are no more posted Receives for the associated QP, and
>> thus it is safe to destroy it.
>
> I don't think there is anything now that handles draining an SRQ, nor
> ensuring a QP's RQEs are completed/consumed from its SRQ when draining
> the QP.

There is no "QP's RQEs" in s SRQ, this is a misconception.
A SRQ is just a bunch of receive buffers. The QP is assigned
and completion time (when the incoming recv is processed).
--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

  parent reply	other threads:[~2016-04-26 19:18 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-26 14:55 [PATCH] IB/core: Don't drain the receive queue for srq attached queue-pair Sagi Grimberg
     [not found] ` <1461682538-19647-1-git-send-email-sagi-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org>
2016-04-26 15:07   ` Steve Wise
     [not found]     ` <CAB5WxwfAGL2qCe7w6A=mKQ65mwjbKKbp_8qFJFRF6Aj7tE+tLQ@mail.gmail.com>
     [not found]       ` <CAB5WxwfAGL2qCe7w6A=mKQ65mwjbKKbp_8qFJFRF6Aj7tE+tLQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-04-26 15:43         ` Christoph Hellwig
     [not found]           ` <20160426154328.GA12398-jcswGhMUV9g@public.gmane.org>
2016-04-26 15:55             ` Chuck Lever
     [not found]               ` <912C9E71-05E3-4ED9-9B41-137E131E3A71-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2016-04-26 16:00                 ` Steve Wise
     [not found]                   ` <571F9084.2040506-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2016-04-26 16:04                     ` Bart Van Assche
     [not found]                       ` <571F917C.40008-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
2016-04-26 16:28                         ` Steve Wise
     [not found]                           ` <571F972B.6030904-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2016-04-26 17:27                             ` Bart Van Assche
     [not found]                               ` <571FA4E5.2030501-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
2016-04-26 17:35                                 ` Steve Wise
     [not found]                                   ` <571FA6D5.2060607-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2016-04-26 19:24                                     ` Sagi Grimberg
     [not found]                                       ` <571FC051.7020009-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org>
2016-04-26 19:25                                         ` Steve Wise
2016-04-26 19:20                                 ` Sagi Grimberg
2016-04-26 19:18                         ` Sagi Grimberg
2016-04-26 19:18                     ` Sagi Grimberg [this message]
2016-04-26 19:15                 ` Sagi Grimberg
2016-04-26 19:07             ` Sagi Grimberg
2016-04-26 15:46   ` Bart Van Assche
     [not found]     ` <571F8D48.4020503-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
2016-04-26 19:11       ` Sagi Grimberg
     [not found]         ` <571FBD4B.2030102-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org>
2016-04-26 20:06           ` Doug Ledford

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=571FBEE8.20009@grimberg.me \
    --to=sagi-nqwnxtmzq1alnmji0ikvqw@public.gmane.org \
    --cc=chuck.lever-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org \
    --cc=hch-jcswGhMUV9g@public.gmane.org \
    --cc=linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    --cc=swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.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
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.