From: Josh Hursey (jjhursey_at_open-mpi.org)
Date: Wed Aug 26 2009 - 13:02:09 PDT
I posted the Bug #2620: http://upc-bugs.lbl.gov/bugzilla/show_bug.cgi?id=2620 As another data point, I have access to another machine running BLCR 0.8.1 and Linux kernel 2.6.18-53, and it is running correctly in this regard. I will try to downgrade the kernel and see if that helps. Thanks, Josh On Aug 26, 2009, at 3:32 PM, Paul H. Hargrove wrote: > Josh, > > The error you see building 0.8.1 is because it does not support a > 2.6.29.6 kernel (supported 2.6.29, but the put_fs_struct change > took place somewhere in the 2.6.26.X series). > > I have tried 0.8.1 and 0.8.2 on 2.6.29 and 2.6.30 kernels and all > three valid combinations show the invalid /proc/pid/exe link. > > The problem does not appear to be dependent on BLCR version, and a > quick look at kernel sources suggest the problem may originate in a > kernel change between 2.6.25 and 2.6.26. So, I suspect that if you > use a kernel 2.6.25 or older the symlink will be correct. > > If you have a moment, please enter a bug report for this. Based on > the kernel change I noticed, this is probably less than a 1-day job > to fix and test, but I don't know when I'll be able to start. > > -Paul > > Josh Hursey wrote: >> I have a Linux box running Fedora 11, and BLCR 0.8.2 >> ---------- >> shell$ uname -a >> Linux cloud9 2.6.29.6-217.2.8.fc11.i586 #1 SMP Sat Aug 15 00:44:39 >> EDT 2009 i686 i686 i386 GNU/Linux >> ---------- >> >> I am finding that the /proc/PID/exe link is not restored on >> cr_restart (I used the counting example in the distribution). It >> is valid when running normally, but after restart the link is >> invalid (not pointing to anything). >> >> I believe that 0.8.1 was working correctly in this regard, but I >> cannot verify on this machine at the moment (build error >> cr_dest_file.c:189: error: implicit declaration of function >> �put_fs_struct�). >> >> Have others seen this problem? I can send along more info if that >> might help. >> >> -- Josh >> >> > > > -- > Paul H. Hargrove PHHargrove_at_lbl_dot_gov > Future Technologies Group Tel: +1-510-495-2352 > HPC Research Department Fax: +1-510-486-6900 > Lawrence Berkeley National Laboratory