[lkml]   [2010]   [Mar]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Subjectgcc and kernel build trouble report

At the start of the week I moved kernels forwarded. I tried
2.6.34-rc1 and 2.6.33-git15. The lpfc fiber channel driver was failing
to load and generating a hardware level pci bus fault that was resetting
the server. There is a small thread on linux-scsi from when I started.

Tried forward porting know working versions of the driver to the new
kernels but it did not fix the problem. I have to reason to suspect the
actual code in the driver is not really involved with the issue.

I booted whole older kernels until I sorted out that somewhere post
2.6.33 stock that issue started. I am not 100% sure where in the kernel
commits the problem starts I just know if is after 2.6.33.

It was identified that an alternate .config file worked and I decided
to dig on the config options.

I narrowed the config change down to:


I have to set CONFIG_CC_OPTIMIZE_FOR_SIZE=y else I get a pci fault
while failing to load the lpfc driver. As I understand this passes a
different -O flag to the build.

Relevant details:

Hardware: IBM x3550m2 server. Current Intel based 2 socket system,
nothing fancy.

GCC: gcc version 4.3.4 [gcc-4_3-branch revision 152973] (SUSE Linux)

Kernels: For sure, 2.6.34-rc1, 2.6.33-git15 have the problem. If the 10
or so 2.6.33 and before kernels trees I have booted I did not encounter
the issue.

Config: CONFIG_CC_OPTIMIZE_FOR_SIZE=y or bad things happen. I booted a
ton of .config changes, 100% sure this is it, it has been triple

All in all not a fun experience and I don't really have the skills to
fix this issue. I am going to try a different gcc version when I get a
few cycles.

Any suggestions on what to do with this gcc / kernel build issue? I
found it a little unsettling.

Keith Mannthey

 \ /
  Last update: 2010-03-13 00:41    [W:0.034 / U:6.092 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site