archive mirror
 help / color / mirror / Atom feed
From: Ingo Molnar <>
To: David Brownell <>
	Andrew Morton <>,
	Linux Kernel list <>
Subject: Re: [patch 2.6.24-rc3] rtc-cmos alarm acts as oneshot
Date: Sat, 1 Dec 2007 08:44:00 +0100	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

* David Brownell <> wrote:

> Start making the rtc-cmos alarm act more like a oneshot alarm by 
> disabling that alarm after its IRQ fires.  (ACPI hooks are also 
> needed.)
> The Linux RTC framework has previously been a bit vague in this area, 
> but any other behavior is problematic and not very portable.  RTCs 
> with full YYYY-MM-DD HH:MM[:SS] alarms won't have a problem here.  
> Only ones with partial match criteria, with the most visible example 
> being the PC RTC, get confused.  (Because the criteria will match 
> repeatedly.)
> Update comments relating to that oneshot behavior and timezone 
> handling. (Timezones are another issue that's mostly visible with 
> rtc-cmos.  That's because PCs often dual-boot MS-Windows, which likes 
> its RTC to match local wall-clock time instead of UTC.)

Cool. I'm still wondering about:

basically, we had universally working /dev/rtc before, now it appears we 
dont have it anymore. Or were the problems in this bugzilla present with 
the old code too?


  reply	other threads:[~2007-12-01  7:44 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-11-30 22:18 [patch 2.6.24-rc3] rtc-cmos alarm acts as oneshot David Brownell
2007-12-01  7:44 ` Ingo Molnar [this message]
2007-12-01  8:20   ` David Brownell

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:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \ \ \ \ \ \ \

* 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).