Re: [RFCv4] timerfd: add TFD_NOTIFY_CLOCK_SET to watch for clock changes
From: Alexander Shishkin <hidden>
Date: 2011-03-10 08:19:24
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On Thu, Mar 10, 2011 at 01:36:18AM +0100, Kay Sievers wrote:
On Thu, Mar 10, 2011 at 01:25, Andrew Morton [off-list ref] wrote:quoted
On Wed, 9 Mar 2011 16:36:51 +0200 Alexander Shishkin [off-list ref] wrote:quoted
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.quoted
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.
Yes, but with John's CLOCK_BOOTTIME patches (which are in the tip tree currently) it will be. Regards, -- Alex -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html