lkml.org 
[lkml]   [2004]   [Sep]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH][2.6.9-rc2-mm3] perfctr ppc32 preliminary interrupt support
From
Date

> Tested on an MPC7455 (G4-type chip). The patch applies cleanly
> to and compiles ok in 2.6.9-rc2-mm3, but 2.6.9-rc2-mm3 has
> other problems on PPC32 so I tested it with 2.6.9-rc2 vanilla.

Be careful that some G4's have a bug which can cause a
perf monitor interrupt to crash your kernel :( Basically, the
problem is if any of TAU or PerfMon interrupt happens at the
same time as a DEC interrupt, some revs of the CPU can get
confused and lose the previous exception state.

Check out the erratas, but it may be worth adding a cputable
feature bit entry to note which models have useable interrupt
and which don't.



-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 14:06    [W:0.051 / U:0.316 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site