From: Tom Rini <trini@kernel.crashing.org>
To: Hollis Blanchard <hollis@austin.ibm.com>
Cc: Todd Poynor <tpoynor@mvista.com>,
devel list <linuxppc-dev@lists.linuxppc.org>
Subject: Re: RFC: 405LP sleep
Date: Mon, 23 Dec 2002 08:03:42 -0700 [thread overview]
Message-ID: <20021223150342.GA15397@opus.bloom.county> (raw)
In-Reply-To: <1040427074.1095.23.camel@granite.austin.ibm.com>
On Fri, Dec 20, 2002 at 05:31:14PM -0600, Hollis Blanchard wrote:
> On Thu, 2002-12-19 at 15:36, Todd Poynor wrote:
>
> > + jiffies += rtc_secs_elapsed * HZ;
> >
> > If jiffies is jumped forward then can kernel events (such as those
> > waiting on a kernel timer) be missed?
>
> I certainly *hope* the check is >= rather than == ... :)
They all should in fact be using time_after(...) or so, to deal
correctly with a jiffies wrap. But from what I recall of doing a
massive kick of the jiffies (to test some jiffies wrap thing) in early
2.4 I believe, things can become somewhat unhappy. Think of a device
which happens to be 'sleeping' while the user is on vacation or so.
--
Tom Rini (TR1265)
http://gate.crashing.org/~trini/
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
prev parent reply other threads:[~2002-12-23 15:03 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-19 20:41 RFC: 405LP sleep Hollis Blanchard
2002-12-19 21:36 ` Todd Poynor
2002-12-20 23:31 ` Hollis Blanchard
2002-12-23 15:03 ` Tom Rini [this message]
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=20021223150342.GA15397@opus.bloom.county \
--to=trini@kernel.crashing.org \
--cc=hollis@austin.ibm.com \
--cc=linuxppc-dev@lists.linuxppc.org \
--cc=tpoynor@mvista.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.