On Sat, Oct 05, 2024 at 10:57:59AM +0200, Bert Karwatzki wrote: > > > > > > > I just tested this and it passed ten tests (i.e. upgrading the proton version i > > > steam) in a row. > > > > > > Bert Karwatzki > > > > Perfect :) will send the fix upstream then as a hotfix for 6.12! Thanks > > very much for helping out with this, your help has been absolutely > > invaluable and HUGELY appreciated. > > > > Cheers, Lorenzo > > I also tried another debugging patch: > > diff --git a/lib/maple_tree.c b/lib/maple_tree.c > index e6f0da908ba7..35b0fe3e02f7 100644 > --- a/lib/maple_tree.c > +++ b/lib/maple_tree.c > @@ -3773,6 +3773,8 @@ static noinline void mas_wr_spanning_store(struct > ma_wr_state *wr_mas) > /* Copy l_mas and store the value in b_node. */ > mas_store_b_node(&l_wr_mas, &b_node, l_mas.end); > /* Copy r_mas into b_node. */ > + if (!r_populated && r_mas.offset <= r_mas.end) > + printk(KERN_INFO "%s: avoiding maple tree corrution\n", > __func__); > if (r_populated && r_mas.offset <= r_mas.end) > mas_mab_cp(&r_mas, r_mas.offset, r_mas.end, > &b_node, b_node.b_end + 1); > > and when running the test this prints > > [ 293.477904] [ T5720] mas_wr_spanning_store: avoiding maple tree corrution > [ 293.480202] [ T5720] mas_wr_spanning_store: avoiding maple tree corrution > [ 293.482087] [ T5720] mas_wr_spanning_store: avoiding maple tree corrution > [ 293.484786] [ T5720] mas_wr_spanning_store: avoiding maple tree corrution > [ 293.486644] [ T5720] mas_wr_spanning_store: avoiding maple tree corrution Thanks, interesting it occurred repeatedly... I suspect there are situations in which this kind of corruption can occur and not be a problem too. Nasty one all round! > > in dmesg. > > Bert Karwatzki
