On Mon, 22 Dec 2008 12:42:11 CST, Nathan Lynch wrote: > With slub debug enabled, I see the following errors and crash with > 2.6.28-rc9: > > IBM eHEA ethernet device driver (Release EHEA_0095) > ehea: Error in ehea_h_register_rpage_mr: not on pageboundary > ehea: Error in ehea_reg_mr_section: register_rpage_mr failed > ehea: Error in ehea_reg_kernel_mr: registering mr failed > ehea: Error in ehea_setup_ports: creating MR failed > ehea 23c00100.lhea: setup_ports failed > Unable to handle kernel paging request for data at address 0x6b6b6b6b6b6bbdcb > Faulting instruction address: 0xd000000000064a24 > cpu 0x0: Vector: 300 (Data Access) at [c0000000740e7190] > pc: d000000000064a24: .ehea_update_firmware_handles+0x84/0x47c [ehea] > lr: d00000000006df34: .ehea_probe_adapter+0x35c/0x39c [ehea] > sp: c0000000740e7410 > msr: 8000000000009032 > dar: 6b6b6b6b6b6bbdcb > dsisr: 40000000 > current = 0xc000000074233780 > paca = 0xc0000000008a3300 > pid = 2046, comm = modprobe > enter ? for help > [c0000000740e74f0] d00000000006df34 .ehea_probe_adapter+0x35c/0x39c [ehea] > [c0000000740e75a0] c00000000041d5a4 .of_platform_device_probe+0x78/0xb0 > [c0000000740e7630] c0000000002d8b38 .driver_probe_device+0x13c/0x200 > [c0000000740e76c0] c0000000002d8c90 .__driver_attach+0x94/0xd8 > [c0000000740e7750] c0000000002d7d64 .bus_for_each_dev+0x80/0xd8 > [c0000000740e7800] c0000000002d889c .driver_attach+0x28/0x40 > [c0000000740e7880] c0000000002d8340 .bus_add_driver+0xd4/0x284 > [c0000000740e7920] c0000000002d90a0 .driver_register+0xc4/0x198 > [c0000000740e79d0] c00000000041d45c .of_register_driver+0x4c/0x60 > [c0000000740e7a50] c000000000020ef8 .ibmebus_register_driver+0x30/0x4c > [c0000000740e7ae0] d00000000006e108 .ehea_module_init+0x194/0x208c [ehea] > [c0000000740e7b90] c000000000009028 .do_one_initcall+0x90/0x1ac > [c0000000740e7d90] c00000000008619c .sys_init_module+0xc4/0x200 > [c0000000740e7e30] c0000000000084ac syscall_exit+0x0/0x40 > > (When slub debug is disabled it works fine.) > > PAGE_SIZE allocations via slab are not guaranteed to be page-aligned; > use get_zeroed_page for the 'pt' buffer (I don't really know what this > is, only that it is passed to firmware and that the first error > message complains about its alignment). This allows the system to > boot. > > Signed-off-by: Nathan Lynch <n...@pobox.com> > --- > drivers/net/ehea/ehea_qmr.c | 4 ++-- > 1 files changed, 2 insertions(+), 2 deletions(-) > > By the way, there are several other kzalloc(PAGE_SIZE) call sites in > this driver; are they also making assumptions about alignment?
meh. I would say yes, pretty much everything is expecting a page alignment (4K at least). ++doug _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
