lkml.org 
[lkml]   [2011]   [Mar]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [RFCv4] timerfd: add TFD_NOTIFY_CLOCK_SET to watch for clock changes
    On Thu, Mar 10, 2011 at 01:36:18AM +0100, Kay Sievers wrote:
    > 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.

    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-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/

    \
     
     \ /
      Last update: 2011-03-10 09:21    [W:0.025 / U:0.180 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site