From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
To: Jeff Squyres <jsquyres-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
Cc: Linux RDMA List
<linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Brad Benton <brad.benton-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Subject: Re: Ummunotify: progress at last!
Date: Tue, 23 Mar 2010 11:29:53 -0600 [thread overview]
Message-ID: <20100323172953.GI29129@obsidianresearch.com> (raw)
In-Reply-To: <D7DCABC9-4BB2-4FBA-A7B3-C06F4A848467-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
On Tue, Mar 23, 2010 at 01:17:40PM -0400, Jeff Squyres wrote:
> On Mar 23, 2010, at 12:59 PM, Jason Gunthorpe wrote:
>
> > The main reason for the new FD is so it can be polled on..
>
> What do you poll on the fd for?
>
> With ummunotify, you only read() from the fd when (counter !=
> last_counter). Were you thinking that the poll() would be for
> something else?
poll() is for apps that want to get the notifications without
spinning on the counter. If you don't think that is worth doing it
does simplify things alot, just add two new verbs calls:
ibv_set_mmu_counter(verbs, &my_counter);
ibv_get_mmu_notifications(verbs, &my_list, sizeof(my_list));
Jason
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next prev parent reply other threads:[~2010-03-23 17:29 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-23 16:06 Ummunotify: progress at last! Jeff Squyres
[not found] ` <1CDB2AA4-A8DF-4169-943E-4EA190814596-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
2010-03-23 16:59 ` Jason Gunthorpe
[not found] ` <20100323165920.GH29129-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2010-03-23 17:17 ` Jeff Squyres
[not found] ` <D7DCABC9-4BB2-4FBA-A7B3-C06F4A848467-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
2010-03-23 17:29 ` Jason Gunthorpe [this message]
[not found] ` <20100323172953.GI29129-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2010-03-23 19:17 ` Jeff Squyres
[not found] ` <5F80899D-F989-4162-B050-7E4D6B389876-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
2010-03-23 19:52 ` Jason Gunthorpe
[not found] ` <20100323195251.GJ29129-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2010-03-23 20:01 ` Jeff Squyres
[not found] ` <3B848E1F-C9B6-416A-9E6E-99604E71902A-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
2010-03-23 20:11 ` Jason Gunthorpe
[not found] ` <20100323201124.GK29129-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2010-03-24 5:59 ` Roland Dreier
[not found] ` <adaljdi2rap.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-03-24 17:43 ` Jason Gunthorpe
2010-04-07 19:37 ` Roland Dreier
[not found] ` <ada39z72gww.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-04-07 20:05 ` Jason Gunthorpe
2010-03-24 5:53 ` Roland Dreier
2010-03-24 5:55 ` Roland Dreier
[not found] ` <adapr2u2rib.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-03-24 5:59 ` Jason Gunthorpe
[not found] ` <20100324055913.GA9769-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2010-03-24 6:17 ` Roland Dreier
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