On Mon, Mar 07, 2011 at 11:01:20PM -0800, David Miller wrote: > From: Sam Ravnborg <sam@xxxxxxxxxxxx> > Date: Tue, 8 Mar 2011 07:00:39 +0100 > > > Added davem... > > We see strange SEGV faults in userspace and fail to read from ext2.. > > All on some (but not all) sparc32 boxes. > > I saw the original report. > > But reverting this commit is the wrong thing to do from what I can > tell. > > Either we have: > > 1) A compiler code gen bug. > > 2) Some piece of code which is sparc32 specific is invoking memset > or memcpy in a way which makes assumptions which are in fact not > valid > > 3) The code change is merely making cache offsets change, masking the > true problem > > Especially in cases #2 and #3 we're just hiding a heisen-bug and > not fixing the real problem. Agree on this. But first step is to get confirmation that reverting this commit indeed fixes the bug. Then we can go hunting for 2), 3) or 1). I hope we will find that 2) is the culprint. Sam -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
