Re: RDMA/rpma + fsdax(ext4) was broken since 36f30e486d

Hi all I have verified that below changes can solve this problem diff --git a/mm/hmm.c b/mm/hmm.c index 24f9ff95f3ae..2c9a3e3eefce 100644 --- a/mm/hmm.c +++ b/mm/hmm.c @@ -294,7 +294,7 @@ static int hmm_vma_handle_pte(struct mm_walk *walk, unsigned long addr, * Since each architecture

Re: [RFC PATCH v2 1/7] IB/mlx5: Change ib_umem_odp_map_dma_single_page() to retain umem_mutex

On 11/11/2022 17:22, Daisuke Matsuda wrote: > ib_umem_odp_map_dma_single_page(), which has been used only by the mlx5 > driver, holds umem_mutex on success and releases on failure. This > behavior is not convenient for other drivers to use it, so change it to > always retain mutex on return. > >

Re: [PATCH] nvdimm: nvdimm_bus_register: Avoid adding device to the unregistered bus

On 16/03/2023 23:54, Dan Williams wrote: > Li Zhijian wrote: >> nvdimm_bus_register() could be called from other modules, such as nfit, >> but it can only be called after the nvdimm_bus_type is registered. >> >> BUG: kernel NULL pointer dereference, address: 0098 >> #PF: superviso

Re: [PATCH] nvdimm: nvdimm_bus_register: Avoid adding device to the unregistered bus

On 17/03/2023 10:26, Dan Williams wrote: > lizhij...@fujitsu.com wrote: >> >> >> On 16/03/2023 23:54, Dan Williams wrote: >>> Li Zhijian wrote: >>>> nvdimm_bus_register() could be called from other modules, such as nfit, >>>> but it can

Re: [PATCH] nvdimm: nvdimm_bus_register: Avoid adding device to the unregistered bus

On 17/03/2023 13:59, Dan Williams wrote: > lizhij...@fujitsu.com wrote: >> >> >> On 16/03/2023 23:54, Dan Williams wrote: >>> Li Zhijian wrote: >>>> nvdimm_bus_register() could be called from other modules, such as nfit, >>>> but it can

Re: [PATCH] nvdimm: nvdimm_bus_register: Avoid adding device to the unregistered bus

On 21/03/2023 01:30, Dan Williams wrote: > lizhij...@fujitsu.com wrote: > [..] >>>> Dan, >>>> >>>> Configure the kconfig with ACPI_NFIT [=m] && LIBNVDIMM [=y], and add extra >>>> kernel booting parameter >>>> 'initca

Re: [PATCH] nvdimm: nvdimm_bus_register: Avoid adding device to the unregistered bus

On 21/03/2023 10:38, Dan Williams wrote: > lizhij...@fujitsu.com wrote: > [..] >>> Now I do think it would be a good idea to fail device_add() if the bus >>> is not registered, >> >> BTW, below line 369: device_add() didn't fail in practical. >>