lkml.org 
[lkml]   [2003]   [Nov]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH][RFC] relayfs (1/4) (Documentation)
David S. Miller wrote:
> On Tue, 14 Oct 2003 11:32:28 +0000
> Richard J Moore <rasman@uk.ibm.com> wrote:
>
>
>>Interesting, that assumes sequential processing, if not semi-synchronous
>>processing of events on the receiver side, which is far from guaranteed when
>>considering low-level tracing especially for flight-recorder applications.
>
>
> With netlink you may receive the data asynchronously however you
> wish after you've requested a dump.
>
> I would like to ask that you go study how netlink works and is used
> by things like routing daemons before we discuss this further as
> it looks to me like half the conversation is going to be showing
> you how netlink works. And hey there's even an RFC on netlink :)
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
>

Dave, is there a short write-up (2-3 pages) about netlink.
I like to get a quick understanding about it and how it measures
up to relayfs or vice versa. From some of the discussions here I get
the feeling that they simply might address orthogonal issues.

I recently started using relayfs for various projects after hearing
about it at OLS'03. I often need to get information out of the kernel
(either debugging in interrupt/scheduling context thus preempting use
of printk) or other information for data recording (call it trace or
whatever).
I don't want to use existing "media" (e.g. syslog) as it either clobbers
up that media or I have to search for the information I have put in or
the format (typically char) is not appropriate for my use. I simply want
a dedicated channel to get to the data in the format that I select.

I found relayfs extremely easy to use. Channel setup is a breeze.
User level consumption is through file operations. IMHO it just simply
can not get any simpler that this....
It works in interrupt/scheduling context. Has extremely low overhead
and is stable. I really would like to see relayfs be picked up.
Its a loadable filesystem that at least to this user has provided
some real value, so why would inclusion be so difficult/objectable.
You providing a short document might help me get an appreciation for
your argument.

-- Hubertus

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:58    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site