From: Miroslav Lichvar <mlichvar@redhat.com>
To: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: davem@davemloft.net, netdev@vger.kernel.org, nhorman@redhat.com,
sassmann@redhat.com, Jacob Keller <jacob.e.keller@intel.com>,
Richard Cochran <richardcochran@gmail.com>
Subject: Re: [net 1/8] igb: shorten maximum PHC timecounter update interval
Date: Thu, 1 Nov 2018 15:12:39 +0100 [thread overview]
Message-ID: <20181101141239.GF19434@localhost> (raw)
In-Reply-To: <20181031194254.16417-2-jeffrey.t.kirsher@intel.com>
On Wed, Oct 31, 2018 at 12:42:47PM -0700, Jeff Kirsher wrote:
> From: Miroslav Lichvar <mlichvar@redhat.com>
>
> The timecounter needs to be updated at least once per ~550 seconds in
> order to avoid a 40-bit SYSTIM timestamp to be misinterpreted as an old
> timestamp.
>
> Since commit 500462a9d ("timers: Switch to a non-cascading wheel"),
> scheduling of delayed work seems to be less accurate and a requested
> delay of 540 seconds may actually be longer than 550 seconds. Shorten
> the delay to 480 seconds to be sure the timecounter is updated in time.
It looks like this is the v1 of the patch. There was a v2 I sent on
Oct 26, which made the interval even shorter. I can send a separate
patch for that change.
--
Miroslav Lichvar
next prev parent reply other threads:[~2018-11-01 23:15 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-31 19:42 [net 0/8][pull request] Intel Wired LAN Driver Updates 2018-10-31 Jeff Kirsher
2018-10-31 19:42 ` [net 1/8] igb: shorten maximum PHC timecounter update interval Jeff Kirsher
2018-11-01 14:12 ` Miroslav Lichvar [this message]
2018-10-31 19:42 ` [net 2/8] fm10k: fix SM mailbox full condition Jeff Kirsher
2018-10-31 19:42 ` [net 3/8] fm10k: ensure completer aborts are marked as non-fatal after a resume Jeff Kirsher
2018-10-31 19:42 ` [net 4/8] fm10k: add missing device IDs to the upstream driver Jeff Kirsher
2018-10-31 19:42 ` [net 5/8] fm10k: bump driver version to match out-of-tree release Jeff Kirsher
2018-10-31 19:42 ` [net 6/8] ixgbe/ixgbevf: fix XFRM_ALGO dependency Jeff Kirsher
2018-10-31 19:42 ` [net 7/8] i40e: Update status codes Jeff Kirsher
2018-10-31 19:42 ` [net 8/8] ixgbe: fix MAC anti-spoofing filter after VFLR Jeff Kirsher
2018-11-01 1:23 ` [net 0/8][pull request] Intel Wired LAN Driver Updates 2018-10-31 David Miller
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