Messages in this thread |  | | | From | Kay Sievers <> | | Date | Thu, 10 Mar 2011 01:36:18 +0100 | | Subject | Re: [RFCv4] timerfd: add TFD_NOTIFY_CLOCK_SET to watch for clock changes |
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On Thu, Mar 10, 2011 at 01:25, Andrew Morton <akpm@linux-foundation.org> wrote: > On Wed, 9 Mar 2011 16:36:51 +0200 > Alexander Shishkin <virtuoso@slind.org> wrote: > >> Changes since v3: >> - changed timerfd_settime() semantics (see below) >> Changes since v2: >> - replaced sysfs interface with a syscall >> - added sysctl/procfs handle to set a limit to the number of users >> - fixed issues pointed out by Greg. >> Changes since v1: >> - updated against 2.6.36-rc1, >> - added notification/filtering options, >> - added Documentation/ABI/sysfs-kernel-time-notify interface description.
> It would be helpful to know if the identified users of this feature > actually find it useful and adequate. I guess the most common > application is the 1,001 desktop clock widgets. Do you have any > feedback from any of the owners of those?
We want it for systemd, to provide cron-like functionality but without the need to stupidly wake up every minute and check the system time for possible jumps.
It also sounds useful for a generic resume (after system suspend) notification for applications, which isn't really possible today.
Kay -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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