Hi, This patch fixed my problem. I re-enabled CONFIG_DEBUG_RODATA and I don't have seg fault with or without your DCCP patches. Inserting `dccp_probe` or `tcp_probe`module doesn't cause any troubles. Patrick. On 10/06/07, Ian McDonald <ian.mcdonald@xxxxxxxxxxx> wrote:
On 6/7/07, S. P. Prasanna <prasanna@xxxxxxxxxx> wrote: > > >It faulted when it tried to write the breakpoint instruction into the > > >running kernel's executable code. Apparently the kernel code is now marked > > >read-only? > > > > > > > > Yes it would appear to be the case as user has CONFIG_DEBUG_RODATA > > set. Patrick - can you turn this off and retest? It's under Kernel > > Hacking, Write protect kernel read only data structures. > > > > Ian, > > Please find the fix as suggested by Andi Kleen > for the above stated problem. > > Thanks > Prasanna > > I went to test the fix and first of all went to replicate the problem. My build has CONFIG_DEBUG_RODATA set but the problem does not occur without the patch. Should I be concerned about this and raise a bug for that as I would think that means there is a problem that the read only protection isn't working (this is off Linus' tree synced tonight). Patrick - can you test whether this patch fixes your problem? You said disabling CONFIG_DEBUG_RODATA fixed your problem but can you try re-enabling and testing this patch? Ian -- Web: http://wand.net.nz/~iam4/ Blog: http://iansblog.jandi.co.nz WAND Network Research Group
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