[meta-xilinx] Issue with latest Kernel

[Martin Townsend]

Hi,

Just wondering if any of you guys have seen the following with the Microblaze:

[ 1156.040381] BUG: Bad rss-counter state mm:cfb3a7a0 idx:1 val:4
[ 1156.110657] BUG: non-zero nr_ptes on freeing mm: 3
[ 1156.187600] BUG: Bad rss-counter state mm:cf216e00 idx:0 val:-44
[ 1156.271739] BUG: non-zero nr_ptes on freeing mm: -3
[ 1161.538467] BUG: Bad rss-counter state mm:cf216e00 idx:1 val:-1
[ 1161.609861] BUG: non-zero nr_ptes on freeing mm: -1
[ 1161.674707] BUG: Bad rss-counter state mm:cfb3a7a0 idx:0 val:36
[ 1161.746574] BUG: Bad rss-counter state mm:cfb3a7a0 idx:1 val:11
[ 1161.818260] BUG: non-zero nr_ptes on freeing mm: 1
[ 1167.029287] BUG: Bad rss-counter state mm:cfb3a7a0 idx:0 val:-48
[ 1167.101769] BUG: Bad rss-counter state mm:cfb3a7a0 idx:1 val:10
[ 1167.173882] BUG: non-zero nr_ptes on freeing mm: 1
[ 1167.247547] Oops: kernel access of bad area, sig: 11
[ 1167.307226] CPU: 0 PID: 4185 Comm: cat Tainted: G           O    4.1.0-rc4-br

Admittedly I'm using a 4.1.0 kernel so it maybe something introduced into this kernel but saying that this kernel works fine on our Zynq platform.  We usually get the above asserts after a few minutes and once it happens the system becomes unstable and unusable.  We are using the Fido branch.

Also I noticed that U-Boot doesn't build on the Fido branch for Microblaze but does for Zynq.  We patch it to enable UBIFS and it throws up a bunch of unresolved externals.  I wrote a patch to remove them as they were functions that weren't being used but I then found that every time U-Boot tried to do anything useful with the UBIFS it would crash and lock the board up.

Best Regards,
Martin.