From: Matt Mackall <mpm@selenic.com>
To: Patrick McHardy <kaber@trash.net>
Cc: Jeff Garzik <jgarzik@pobox.com>,
netdev@oss.sgi.com, Jeff Moyer <jmoyer@redhat.com>
Subject: Re: [PATCH 1/7] netpoll: shorten carrier detect timeout
Date: Thu, 10 Mar 2005 20:42:46 -0800 [thread overview]
Message-ID: <20050311044246.GT3120@waste.org> (raw)
In-Reply-To: <42311FF9.5010007@trash.net>
On Fri, Mar 11, 2005 at 05:35:05AM +0100, Patrick McHardy wrote:
> Matt Mackall wrote:
> >Ok, on closer inspection, the current logic is: the NIC reports
> >carrier detect nearly instaneously and thus its carrier detect
> >reporting is considered unreliable. Rather than immediately sending
> >packets, we wait for some interval for it to really be up so that the
> >backlog of console messages doesn't get pumped into the bit bucket.
> >
> >So I'm going to change it from "flaky" to "untrustworthy" and add a
> >comment.
>
> Why don't you trust an instaneously available carrier? Any
> reason to assume there will be false positives?
Because I had reports of people losing all their boot messages until
this logic was added (about a year ago now?). I don't remember which
NICs were implicated, but some apparently report carrier is always
available.
--
Mathematics is the supreme nostalgia of our time.
next prev parent reply other threads:[~2005-03-11 4:42 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-03 20:46 [PATCH 0/7] netpoll: recursion fixes, queueing, and cleanups Matt Mackall
2005-03-03 20:46 ` [PATCH 1/7] netpoll: shorten carrier detect timeout Matt Mackall
2005-03-03 20:46 ` [PATCH 2/7] netpoll: filter inlines Matt Mackall
2005-03-03 20:46 ` [PATCH 3/7] netpoll: add netpoll point to net_device Matt Mackall
2005-03-03 20:46 ` [PATCH 4/7] netpoll: fix ->poll() locking Matt Mackall
2005-03-03 20:46 ` [PATCH 5/7] netpoll: add optional dropping and queueing support Matt Mackall
2005-03-03 20:46 ` [PATCH 6/7] netpoll: handle xmit_lock recursion similarly Matt Mackall
2005-03-03 20:46 ` [PATCH 7/7] netpoll: avoid kfree_skb on packets with destructo Matt Mackall
2005-03-03 21:00 ` David S. Miller
2005-03-03 21:17 ` Jeff Garzik
2005-03-03 21:29 ` David S. Miller
2005-03-03 21:33 ` Jeff Garzik
2005-03-03 21:39 ` Matt Mackall
2005-03-03 21:41 ` David S. Miller
2005-03-03 21:32 ` Matt Mackall
2005-03-23 2:35 ` David S. Miller
2005-04-22 22:24 ` [PATCH 4/7] netpoll: fix ->poll() locking Jeff Moyer
2005-04-22 22:52 ` David S. Miller
2005-04-22 23:02 ` Jeff Moyer
2005-04-22 22:59 ` David S. Miller
2005-04-23 2:14 ` Matt Mackall
2005-04-23 5:12 ` David S. Miller
2005-03-06 0:09 ` [PATCH 1/7] netpoll: shorten carrier detect timeout Patrick McHardy
2005-03-06 0:20 ` Matt Mackall
2005-03-06 1:01 ` Patrick McHardy
2005-03-10 23:01 ` Matt Mackall
2005-03-11 4:35 ` Patrick McHardy
2005-03-11 4:42 ` Matt Mackall [this message]
2005-03-11 4:53 ` Patrick McHardy
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=20050311044246.GT3120@waste.org \
--to=mpm@selenic.com \
--cc=jgarzik@pobox.com \
--cc=jmoyer@redhat.com \
--cc=kaber@trash.net \
--cc=netdev@oss.sgi.com \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).