9fans - fans of the OS Plan 9 from Bell Labs
 help / color / mirror / Atom feed
From: Lucio De Re <lucio@proxima.alt.za>
To: 9fans@9fans.net
Subject: Re: [9fans] That deadlock, again
Date: Thu, 18 Nov 2010 20:01:20 +0200	[thread overview]
Message-ID: <2c37a72c526cc8f79c2b35be1c96ec3d@proxima.alt.za> (raw)
In-Reply-To: <ddd5f2dd81a6a03744b4df7806ba55ac@ladd.quanstro.net>

> and i'm just wrong.  intentionally or not, devsd does
> qlock things with no up from sdreset().  ether82598
> does too (my fault).

I suggest you fix ether82598: it is OK to call qlock() and qunlock()
without "up", but only if sure that the qlock() will succeed.  If it
has to wait, it will panic.  Given that, why do the locking at all?

++L




  reply	other threads:[~2010-11-18 18:01 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-11-18  5:50 Lucio De Re
2010-11-18  5:53 ` erik quanstrom
2010-11-18  8:11   ` Lucio De Re
2010-11-18  8:35     ` cinap_lenrek
2010-11-18  9:20     ` cinap_lenrek
2010-11-18 10:48       ` Lucio De Re
2010-11-18 15:10         ` erik quanstrom
2010-11-18 16:46           ` erik quanstrom
2010-11-18 18:01             ` Lucio De Re [this message]
2010-11-18 18:29               ` C H Forsyth
2010-11-18 18:23                 ` Lucio De Re
2010-11-18 18:33                 ` Lucio De Re
2010-11-18 18:43               ` erik quanstrom
2010-11-18 18:54                 ` erik quanstrom
2010-11-18 19:01                 ` Lucio De Re
2010-11-18 19:27                   ` Lucio De Re
2010-11-18 18:03           ` Lucio De Re
2010-11-18  5:57 ` Lucio De Re
  -- strict thread matches above, loose matches on Subject: below --
2010-11-16  4:21 lucio
2010-11-16  4:40 ` erik quanstrom
2010-11-16  5:03   ` lucio
2010-11-16  5:11     ` cinap_lenrek
2010-11-16  5:18       ` lucio
2010-11-16  5:28         ` cinap_lenrek
2010-11-16  6:47           ` Lucio De Re
2010-11-16 13:53     ` erik quanstrom
2010-11-16 18:03       ` lucio
2010-11-17  4:08         ` Lucio De Re
2010-11-17  4:18           ` erik quanstrom
2010-11-17  4:37             ` Lucio De Re
2010-11-17  4:43               ` erik quanstrom
2010-11-17  5:22             ` cinap_lenrek
2010-11-17  6:45               ` Lucio De Re
2010-11-17  7:03                 ` Lucio De Re
2010-11-17  7:09                   ` erik quanstrom
2010-11-17  5:33             ` cinap_lenrek
2010-11-17  6:48               ` Lucio De Re
2010-11-17  7:03                 ` erik quanstrom
2010-11-17 14:40           ` Russ Cox

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=2c37a72c526cc8f79c2b35be1c96ec3d@proxima.alt.za \
    --to=lucio@proxima.alt.za \
    --cc=9fans@9fans.net \
    /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).