From: Roland Dreier <rdreier@cisco.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Ben Collins <ben.collins@ubuntu.com>,
linux-kernel@vger.kernel.org, Zachary Amsden <zach@vmware.com>
Subject: Re: [PATCH 4/6] RTC: Ratelimit "lost interrupts" message
Date: Thu, 24 May 2007 14:15:12 -0700 [thread overview]
Message-ID: <adaejl56hzz.fsf@cisco.com> (raw)
In-Reply-To: <20070524140956.12ff7c99.akpm@linux-foundation.org> (Andrew Morton's message of "Thu, 24 May 2007 14:09:56 -0700")
> > I got it a lot when using any sort of virtualization on my Core2Duo
> > (kvm, vmware, qemu). Just a big spew. Honestly, I was getting this with
> > 2.6.20, and haven't tested again with latest kernel.
>
> OK, a bit of googling finds things like this:
> http://chxo.com/be2/20060821_3333.html, so I assume that it's some sort of
> generic problem with the hypervisor's emulation of the RTC.
Actually I saw this "lost interrupts" spew on the host (ie the
non-virtualized kernel) running just plain qemu (no kvm or anything
scary like that). It seemed to be some long irqs-off latency in the
tun/tap or bridging code (it went away when I stopped using "-net tap"
on the qemu command line), but I never succeeded in getting Ingo's
latency tracer to be able to track it down.
- R.
next prev parent reply other threads:[~2007-05-24 21:15 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-23 21:59 [PATCH 0/6] Patch sync from Ubuntu tree Ben Collins
2007-05-23 21:59 ` [PATCH 1/6] i386/x86_64: Allow disabling the putstr's from compressed boot wrapper Ben Collins
2007-05-24 3:15 ` Randy Dunlap
2007-05-24 20:44 ` [PATCH 1/6] i386/x86_64: Allow disabling the putstr's from compressed boot wrapper (fixed) Andrew Morton
2007-05-25 11:33 ` [PATCH 1/6] i386/x86_64: Allow disabling the putstr's from compressed boot wrapper Andi Kleen
2007-05-25 12:52 ` Ben Collins
2007-05-25 19:45 ` H. Peter Anvin
2007-05-25 23:23 ` Jesse Barnes
2007-05-25 23:28 ` H. Peter Anvin
2007-05-25 23:38 ` Jesse Barnes
2007-05-25 23:43 ` H. Peter Anvin
2007-05-25 23:50 ` Jesse Barnes
2007-05-25 23:50 ` Ben Collins
2007-05-25 23:52 ` H. Peter Anvin
2007-05-23 22:18 ` [PATCH 2/6] PM: Do not require dev spew to get PM_DEBUG Ben Collins
2007-05-23 22:21 ` [PATCH 3/6] HCIUSB: Initialize the Broadcom USB Bluetooth device in Dell laptops Ben Collins
2007-05-24 17:02 ` Marcel Holtmann
2007-05-24 17:33 ` Ben Collins
2007-05-23 22:23 ` [PATCH 4/6] RTC: Ratelimit "lost interrupts" message Ben Collins
2007-05-24 20:48 ` Andrew Morton
2007-05-24 20:56 ` Ben Collins
2007-05-24 21:09 ` Andrew Morton
2007-05-24 21:15 ` Roland Dreier [this message]
2007-05-24 21:16 ` Zachary Amsden
2007-05-23 22:30 ` [PATCH 5/6] SUNHME: Workaround ancient hang on U1's Ben Collins
2007-05-24 0:17 ` David Miller
2007-05-24 1:59 ` Ben Collins
2007-05-24 12:30 ` Daniel Drake
2007-05-23 22:39 ` [PATCH 6/6] UNUSUAL_DEV: Sync up some reported devices from Ubuntu Ben Collins
2007-05-24 3:59 ` Phil Dibowitz
2007-05-24 4:09 ` Ben Collins
2007-05-30 21:50 ` Dave Jones
2007-05-30 22:25 ` Phil Dibowitz
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=adaejl56hzz.fsf@cisco.com \
--to=rdreier@cisco.com \
--cc=akpm@linux-foundation.org \
--cc=ben.collins@ubuntu.com \
--cc=linux-kernel@vger.kernel.org \
--cc=zach@vmware.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 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.