Kumar Gala writes: > On Aug 17, 2009, at 6:00 PM, Paul Mackerras wrote: > > > On 32-bit systems with 64-bit PTEs, the PTEs have to be written in two > > 32-bit halves. On SMP we write the higher-order half and then the > > lower-order half, with a write barrier between the two halves, but on > > UP there was no particular ordering of the writes to the two halves. > > > > This extends the ordering that we already do on SMP to the UP case as > > well. The reason is that with the perf_counter subsystem potentially > > accessing user memory at interrupt time to get stack traces, we have > > to be careful not to create an incorrect but apparently valid PTE even > > on UP. > > > > Signed-off-by: Paul Mackerras <pau...@samba.org> > > --- > > arch/powerpc/include/asm/pgtable.h | 6 +++--- > > 1 files changed, 3 insertions(+), 3 deletions(-) > > Just out of interest did you end up hitting this in testing?
No. Ben told me he wanted this change, so I did what I was told. :) Paul. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
