On Wed, Oct 19, 2016 at 7:39 PM, Mike Williamson < michael.william...@criticallink.com> wrote:
> Hello, > > We are running 3.16 on an Altera Cyclone V HPS. We are observing an > intermittent hang (~2.5% of power on startup attempts) during the boot > process. > > We have enabled earlyprintk and found: > > 1) The period of freezes changes from ~2.5% to < 1%. > > 2) The boot process stalls between the following messages (e.g., the > second CPU1 line doesn't show on the freeze cases). > > [ 0.082719] Setting up static identity map for 0x498ac8 - 0x498b20 > [ 0.091138] CPU1: Booted secondary processor > > 3) Before enabling earlyprintk, we noted that disabling other elements in > the device tree seemed to alter the failure rate (made it worse). > > The same hardware seems to work fine with 3.12. I have not tried 3.10 > ltsi. We moved to 3.16 in order to pick up some patches related to using > the EMAC through the fabric interface. > > We have the cpu1-start-addr = <0xffd080c4> patch in the dtsi file. > > Does anyone have any suggestions what to look at here? > > > Strange. I never encounter such freezing on various kernel that I have used, i.e. socfpga kernel 3.9, 3.10-ltsi, 4.1.22-ltsi; mainline kernel 4.7x, 4.8x. By 2.5%, how many times did you test there?
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