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From: Christian Zigotzky <chzigotzky@xenosoft.de>
To: Christoph Hellwig <hch@lst.de>
Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-mm@kvack.org, iommu@lists.linux-foundation.org,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	paulus@samba.org, darren@stevens-zone.net,
	"contact@a-eon.com" <contact@a-eon.com>,
	rtd2@xtra.co.nz, mad skateman <madskateman@gmail.com>,
	Rob Herring <robh+dt@kernel.org>,
	linuxppc-dev <linuxppc-dev@lists.ozlabs.org>
Subject: Re: Bug 205201 - overflow of DMA mask and bus mask
Date: Sun, 10 Nov 2019 08:27:46 +0100
Message-ID: <d2c614ec-c56e-3ec2-12d0-7561cd30c643@xenosoft.de> (raw)
In-Reply-To: <2f3c81bd-d498-066a-12c0-0a7715cda18f@xenosoft.de>

On 07 November 2019 at 10:53 am, Christian Zigotzky wrote:
> On 05 November 2019 at 5:28 pm, Christoph Hellwig wrote:
>> On Tue, Nov 05, 2019 at 08:56:27AM +0100, Christian Zigotzky wrote:
>>> Hi All,
>>>
>>> We still have DMA problems with some PCI devices. Since the PowerPC 
>>> updates
>>> 4.21-1 [1] we need to decrease the RAM to 3500MB (mem=3500M) if we 
>>> want to
>>> work with our PCI devices. The FSL P5020 and P5040 have these problems
>>> currently.
>>>
>>> Error message:
>>>
>>> [   25.654852] bttv 1000:04:05.0: overflow 0x00000000fe077000+4096 
>>> of DMA
>>> mask ffffffff bus mask df000000
>>>
>>> All 5.x Linux kernels can't initialize a SCSI PCI card anymore so 
>>> booting
>>> of a Linux userland isn't possible.
>>>
>>> PLEASE check the DMA changes in the PowerPC updates 4.21-1 [1]. The 
>>> kernel
>>> 4.20 works with all PCI devices without limitation of RAM.
>> Can you send me the .config and a dmesg?  And in the meantime try the
>> patch below?
>>
>> ---
>> >From 4d659b7311bd4141fdd3eeeb80fa2d7602ea01d4 Mon Sep 17 00:00:00 2001
>> From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
>> Date: Fri, 18 Oct 2019 13:00:43 +0200
>> Subject: dma-direct: check for overflows on 32 bit DMA addresses
>>
>> As seen on the new Raspberry Pi 4 and sta2x11's DMA implementation it is
>> possible for a device configured with 32 bit DMA addresses and a partial
>> DMA mapping located at the end of the address space to overflow. It
>> happens when a higher physical address, not DMAable, is translated to
>> it's DMA counterpart.
>>
>> For example the Raspberry Pi 4, configurable up to 4 GB of memory, has
>> an interconnect capable of addressing the lower 1 GB of physical memory
>> with a DMA offset of 0xc0000000. It transpires that, any attempt to
>> translate physical addresses higher than the first GB will result in an
>> overflow which dma_capable() can't detect as it only checks for
>> addresses bigger then the maximum allowed DMA address.
>>
>> Fix this by verifying in dma_capable() if the DMA address range provided
>> is at any point lower than the minimum possible DMA address on the bus.
>>
>> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
>> ---
>>   include/linux/dma-direct.h | 8 ++++++++
>>   1 file changed, 8 insertions(+)
>>
>> diff --git a/include/linux/dma-direct.h b/include/linux/dma-direct.h
>> index adf993a3bd58..6ad9e9ea7564 100644
>> --- a/include/linux/dma-direct.h
>> +++ b/include/linux/dma-direct.h
>> @@ -3,6 +3,7 @@
>>   #define _LINUX_DMA_DIRECT_H 1
>>     #include <linux/dma-mapping.h>
>> +#include <linux/memblock.h> /* for min_low_pfn */
>>   #include <linux/mem_encrypt.h>
>>     #ifdef CONFIG_ARCH_HAS_PHYS_TO_DMA
>> @@ -27,6 +28,13 @@ static inline bool dma_capable(struct device *dev, 
>> dma_addr_t addr, size_t size)
>>       if (!dev->dma_mask)
>>           return false;
>>   +#ifndef CONFIG_ARCH_DMA_ADDR_T_64BIT
>> +    /* Check if DMA address overflowed */
>> +    if (min(addr, addr + size - 1) <
>> +        __phys_to_dma(dev, (phys_addr_t)(min_low_pfn << PAGE_SHIFT)))
>> +        return false;
>> +#endif
>> +
>>       return addr + size - 1 <=
>>           min_not_zero(*dev->dma_mask, dev->bus_dma_mask);
>>   }
> Hello Christoph,
>
> Thanks a lot for your patch! Unfortunately this patch doesn't solve 
> the issue.
>
> Error messages:
>
> [    6.041163] bttv: driver version 0.9.19 loaded
> [    6.041167] bttv: using 8 buffers with 2080k (520 pages) each for 
> capture
> [    6.041559] bttv: Bt8xx card found (0)
> [    6.041609] bttv: 0: Bt878 (rev 17) at 1000:04:05.0, irq: 19, 
> latency: 128, mmio: 0xc20001000
> [    6.041622] bttv: 0: using: Typhoon TView RDS + FM Stereo / KNC1 TV 
> Station RDS [card=53,insmod option]
> [    6.042216] bttv: 0: tuner type=5
> [    6.111994] bttv: 0: audio absent, no audio device found!
> [    6.176425] bttv: 0: Setting PLL: 28636363 => 35468950 (needs up to 
> 100ms)
> [    6.200005] bttv: PLL set ok
> [    6.209351] bttv: 0: registered device video0
> [    6.211576] bttv: 0: registered device vbi0
> [    6.214897] bttv: 0: registered device radio0
> [  114.218806] bttv 1000:04:05.0: overflow 0x00000000ff507000+4096 of 
> DMA mask ffffffff bus mask df000000
> [  114.218848] Modules linked in: rfcomm bnep tuner_simple tuner_types 
> tea5767 tuner tda7432 tvaudio msp3400 bttv tea575x tveeprom 
> videobuf_dma_sg videobuf_core rc_core videodev mc btusb btrtl btbcm 
> btintel bluetooth uio_pdrv_genirq uio ecdh_generic ecc
> [  114.219012] [c0000001ecddf720] [80000000008ff6e8] 
> .buffer_prepare+0x150/0x268 [bttv]
> [  114.219029] [c0000001ecddf860] [80000000008fff6c] 
> .bttv_qbuf+0x50/0x64 [bttv]
>
> -----
>
> Trace:
>
> [  462.783184] Call Trace:
> [  462.783187] [c0000001c6c67420] [c0000000000b3358] 
> .report_addr+0xb8/0xc0 (unreliable)
> [  462.783192] [c0000001c6c67490] [c0000000000b351c] 
> .dma_direct_map_page+0xf0/0x128
> [  462.783195] [c0000001c6c67530] [c0000000000b35b0] 
> .dma_direct_map_sg+0x5c/0xac
> [  462.783205] [c0000001c6c675e0] [8000000000862e88] 
> .__videobuf_iolock+0x660/0x6d8 [videobuf_dma_sg]
> [  462.783220] [c0000001c6c676b0] [8000000000854274] 
> .videobuf_iolock+0x98/0xb4 [videobuf_core]
> [  462.783271] [c0000001c6c67720] [80000000008686e8] 
> .buffer_prepare+0x150/0x268 [bttv]
> [  462.783276] [c0000001c6c677c0] [8000000000854afc] 
> .videobuf_qbuf+0x2b8/0x428 [videobuf_core]
> [  462.783288] [c0000001c6c67860] [8000000000868f6c] 
> .bttv_qbuf+0x50/0x64 [bttv]
> [  462.783383] [c0000001c6c678e0] [80000000007bf208] 
> .v4l_qbuf+0x54/0x60 [videodev]
> [  462.783402] [c0000001c6c67970] [80000000007c1eac] 
> .__video_do_ioctl+0x30c/0x3f8 [videodev]
> [  462.783421] [c0000001c6c67a80] [80000000007c3c08] 
> .video_usercopy+0x18c/0x3dc [videodev]
> [  462.783440] [c0000001c6c67c00] [80000000007bb14c] 
> .v4l2_ioctl+0x60/0x78 [videodev]
> [  462.783460] [c0000001c6c67c90] [80000000007d3c48] 
> .v4l2_compat_ioctl32+0x9b4/0x1850 [videodev]
> [  462.783468] [c0000001c6c67d70] [c0000000001ad9cc] 
> .__se_compat_sys_ioctl+0x284/0x127c
> [  462.783473] [c0000001c6c67e20] [c00000000000067c] 
> system_call+0x60/0x6c
> [  462.783475] Instruction dump:
> [  462.783477] 40fe0044 60000000 892255d0 2f890000 40fe0020 3c82ffc5 
> 39200001 60000000
> [  462.783483] 38842029 992255d0 485ad0d9 60000000 <0fe00000> 38210070 
> e8010010 7c0803a6
> [  462.783490] ---[ end trace b677d4a00458e277 ]---
>
> -----
>
> dmesg fsl p5040: https://bugzilla.kernel.org/attachment.cgi?id=285813
>
> Kernel 5.4-rc6 config for the Cyrus+ board and for the QEMU ppce500 
> board (CPU: P5040 and P5020): 
> https://bugzilla.kernel.org/attachment.cgi?id=285815
>
> Bug report: https://bugzilla.kernel.org/show_bug.cgi?id=205201
>
> Thanks for your help,
>
> Christian

Christoph,

Do you have another patch for testing or shall I bisect?

Thanks,
Christian


  reply index

Thread overview: 179+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-14  8:22 use generic DMA mapping code in powerpc V4 Christoph Hellwig
2018-11-14  8:22 ` [PATCH 01/34] powerpc: use mm zones more sensibly Christoph Hellwig
2018-12-06 14:09   ` Christoph Hellwig
2018-12-07 12:18     ` Michael Ellerman
2018-12-07 14:09       ` Christoph Hellwig
2018-12-07 15:04         ` Christian Zigotzky
2018-11-14  8:22 ` [PATCH 02/34] powerpc: allow NOT_COHERENT_CACHE for amigaone Christoph Hellwig
2018-12-06 14:09   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 03/34] powerpc/dma: remove the unused ARCH_HAS_DMA_MMAP_COHERENT define Christoph Hellwig
2018-12-06 14:09   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 04/34] powerpc/dma: remove the unused ISA_DMA_THRESHOLD export Christoph Hellwig
2018-12-06 14:10   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 05/34] powerpc/dma: remove the unused dma_iommu_ops export Christoph Hellwig
2018-12-06 14:10   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 06/34] powerpc/dma: split the two __dma_alloc_coherent implementations Christoph Hellwig
2018-12-06 14:10   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 07/34] powerpc/dma: remove the no-op dma_nommu_unmap_{page,sg} routines Christoph Hellwig
2018-12-06 14:10   ` [PATCH 07/34] powerpc/dma: remove the no-op dma_nommu_unmap_{page, sg} routines Christoph Hellwig
2018-11-14  8:22 ` [PATCH 08/34] powerpc/dma: untangle vio_dma_mapping_ops from dma_iommu_ops Christoph Hellwig
2018-12-06 14:10   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 09/34] powerpc/dma: handle iommu bypass in dma_iommu_ops Christoph Hellwig
2018-11-14  8:22 ` [PATCH 10/34] powerpc/pseries: unwind dma_get_required_mask_pSeriesLP a bit Christoph Hellwig
2018-11-14  8:22 ` [PATCH 11/34] powerpc/pseries: use the generic iommu bypass code Christoph Hellwig
2018-11-14  8:22 ` [PATCH 12/34] powerpc/cell: move dma direct window setup out of dma_configure Christoph Hellwig
2018-12-09 10:23   ` Michael Ellerman
2018-12-12 14:36     ` Christoph Hellwig
2018-12-14 13:29       ` Michael Ellerman
2018-12-14 16:42         ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 13/34] powerpc/cell: use the generic iommu bypass code Christoph Hellwig
2018-11-14  8:22 ` [PATCH 14/34] powerpc/dart: remove dead cleanup code in iommu_init_early_dart Christoph Hellwig
2018-12-06 14:11   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 15/34] powerpc/dart: use the generic iommu bypass code Christoph Hellwig
2018-11-14  8:22 ` [PATCH 16/34] powerpc/powernv: remove pnv_pci_ioda_pe_single_vendor Christoph Hellwig
2018-11-14  8:22 ` [PATCH 17/34] powerpc/powernv: remove pnv_npu_dma_set_mask Christoph Hellwig
2018-11-14  8:22 ` [PATCH 18/34] powerpc/powernv: use the generic iommu bypass code Christoph Hellwig
2018-11-14  8:22 ` [PATCH 19/34] cxl: drop the dma_set_mask callback from vphb Christoph Hellwig
2018-12-06 14:10   ` Christoph Hellwig
2018-11-14  8:23 ` [PATCH 20/34] powerpc/dma: stop overriding dma_get_required_mask Christoph Hellwig
2018-11-14  8:23 ` [PATCH 21/34] powerpc/pci: remove the dma_set_mask pci_controller ops methods Christoph Hellwig
2018-11-14  8:23 ` [PATCH 22/34] powerpc/dma: remove the iommu fallback for coherent allocations Christoph Hellwig
2018-11-14  8:23 ` [PATCH 23/34] powerpc/dma: remove get_pci_dma_ops Christoph Hellwig
2018-11-14  8:23 ` [PATCH 24/34] powerpc/dma: move pci_dma_dev_setup_swiotlb to fsl_pci.c Christoph Hellwig
2018-11-14  8:23 ` [PATCH 25/34] powerpc/dma: remove max_direct_dma_addr Christoph Hellwig
2018-11-14  8:23 ` [PATCH 26/34] powerpc/dma: fix an off-by-one in dma_capable Christoph Hellwig
2018-11-14  8:23 ` [PATCH 27/34] powerpc/fsl_pci: simplify fsl_pci_dma_set_mask Christoph Hellwig
2018-11-14  8:23 ` [PATCH 28/34] dma-mapping, powerpc: simplify the arch dma_set_mask override Christoph Hellwig
2018-11-14  8:23 ` [PATCH 29/34] powerpc/dma: use phys_to_dma instead of get_dma_offset Christoph Hellwig
2018-11-14  8:23 ` [PATCH 30/34] powerpc/dma: remove dma_nommu_mmap_coherent Christoph Hellwig
2018-11-14  8:23 ` [PATCH 31/34] powerpc/dma: use generic direct and swiotlb ops Christoph Hellwig
2018-11-14  8:23 ` [PATCH 32/34] powerpc/dma: remove get_dma_offset Christoph Hellwig
2018-11-14  8:23 ` [PATCH 33/34] powerpc/dma: remove set_dma_offset Christoph Hellwig
2018-11-14  8:23 ` [PATCH 34/34] powerpc/dma: trim the fat from <asm/dma-mapping.h> Christoph Hellwig
2018-11-27  7:42 ` use generic DMA mapping code in powerpc V4 Christoph Hellwig
2018-11-27 22:05   ` Benjamin Herrenschmidt
2018-11-28 11:05   ` Michael Ellerman
2018-11-28 15:55     ` Christian Zigotzky
2018-11-28 20:02       ` Christian Zigotzky
2018-11-28 20:35       ` Michal Suchánek
2018-11-29 17:03         ` Christoph Hellwig
2018-11-29 12:05     ` Christian Zigotzky
2018-11-29 15:30       ` Christian Zigotzky
2018-11-29 17:03       ` Christoph Hellwig
2018-11-29 23:07         ` Christian Zigotzky
2018-11-30 10:53           ` Christoph Hellwig
2018-11-30 12:23             ` Christian Zigotzky
2018-11-30 13:10               ` Christoph Hellwig
2018-11-30 15:29                 ` Christian Zigotzky
2018-12-04  7:31                   ` Christian Zigotzky
2018-12-04  9:53                     ` Christian Zigotzky
2018-12-04 14:24                       ` Christoph Hellwig
2018-12-05  9:44                         ` Christian Zigotzky
2018-12-05 14:05                           ` Christoph Hellwig
2018-12-06 10:55                             ` Christian Zigotzky
2018-12-06 17:10                               ` Christian Zigotzky
2018-12-06 19:36                                 ` Christoph Hellwig
2018-12-07  7:48                                   ` Christian Zigotzky
2018-12-07 13:45                               ` Christian Zigotzky
2018-12-07 18:33                                 ` Christian Zigotzky
2018-12-08 10:29                                   ` Christian Zigotzky
2018-12-08 13:47                                     ` Christian Zigotzky
2018-12-09 14:20                                       ` Christian Zigotzky
2018-12-09 18:26                                         ` Christian Zigotzky
2018-12-10 15:54                                           ` Christian Zigotzky
2018-12-11 14:28                                             ` Christian Zigotzky
2018-12-11 18:17                                               ` Christian Zigotzky
2018-12-12  0:47                                                 ` Benjamin Herrenschmidt
2018-12-12  7:03                                                   ` Christian Zigotzky
2018-12-12 14:15                                                 ` Christoph Hellwig
2018-12-12 14:39                                                   ` Christian Zigotzky
2018-12-13  8:41                                                     ` Christian Zigotzky
2018-12-13  9:10                                                       ` Christoph Hellwig
2018-12-13  9:47                                                         ` Christian Zigotzky
2018-12-13 11:19                                                           ` Christian Zigotzky
2018-12-13 11:25                                                             ` Christoph Hellwig
2018-12-13 13:34                                                               ` Christian Zigotzky
2018-12-13 17:48                                                                 ` Christian Zigotzky
2018-12-13 21:53                                                                   ` Christian Zigotzky
2018-12-14 12:00                                                                     ` Christian Zigotzky
2018-12-14 16:45                                                                       ` Christoph Hellwig
2019-01-03  7:36                                                                       ` Christoph Hellwig
2019-01-03 19:26                                                                         ` Christian Zigotzky
2019-01-05 16:03                                                                           ` Christian Zigotzky
2019-01-09  9:31                                                                             ` Christian Zigotzky
2019-01-11  2:10                                                                               ` Christian Zigotzky
2019-01-12 18:14                                                                                 ` Christian Zigotzky
2019-01-15  8:07                                                                                   ` Christian Zigotzky
2019-01-15  8:49                                                                                     ` Christian Zigotzky
2019-01-15 10:55                                                                                       ` Christian Zigotzky
2019-01-15 13:35                                                                                         ` Christoph Hellwig
2019-01-15 13:56                                                                                           ` Christian Zigotzky
2019-01-15 15:17                                                                                             ` Christoph Hellwig
2019-01-17  9:21                                                                                               ` Christian Zigotzky
2019-01-17  9:31                                                                                                 ` Christoph Hellwig
2019-01-17  9:44                                                                                                   ` Christian Zigotzky
2019-01-18  8:35                                                                                                 ` Christoph Hellwig
2019-01-18 11:10                                                                                                   ` Christian Zigotzky
2019-01-18 11:28                                                                                                     ` Christoph Hellwig
2019-01-18 12:07                                                                                                       ` Christian Zigotzky
2019-01-18 12:18                                                                                                         ` Christoph Hellwig
2019-01-18 12:46                                                                                                           ` Christian Zigotzky
2019-01-18 12:55                                                                                                             ` Christoph Hellwig
2019-01-18 15:06                                                                                                               ` Christian Zigotzky
2019-01-19 11:40                                                                                                                 ` Christian Zigotzky
2019-01-19 11:52                                                                                                                   ` Christian Zigotzky
2019-01-19 13:02                                                                                                                     ` Christoph Hellwig
2019-01-19 14:04                                                                                                                       ` Christoph Hellwig
2019-01-21 14:38                                                                                                                         ` Christian Zigotzky
2019-01-23 14:34                                                                                                                           ` Christian Zigotzky
2019-01-25 13:37                                                                                                                             ` Christian Zigotzky
2019-01-27 13:13                                                                                                                               ` Christian Zigotzky
2019-01-28  7:04                                                                                                                                 ` Christoph Hellwig
     [not found]                                                                                                                                   ` <20190128070422.GA2772-jcswGhMUV9g@public.gmane.org>
2019-01-28 16:22                                                                                                                                     ` Christoph Hellwig
2019-01-28 16:22                                                                                                                                       ` Christoph Hellwig
2019-01-28 16:52                                                                                                                                       ` Christian Zigotzky
2019-01-28 16:52                                                                                                                                         ` Christian Zigotzky
2019-01-29 15:03                                                                                                                                         ` Christian Zigotzky
2019-01-29 16:14                                                                                                                                           ` Christoph Hellwig
2019-01-29 16:34                                                                                                                                             ` Christoph Hellwig
2019-01-30  4:40                                                                                                                                               ` Christian Zigotzky
2019-01-31 12:48                                                                                                                                                 ` Christian Zigotzky
2019-02-01  8:04                                                                                                                                                   ` Christoph Hellwig
2019-02-01 16:54                                                                                                                                                     ` Christian Zigotzky
2019-02-03 16:49                                                                                                                                                       ` Christian Zigotzky
2019-02-04  7:56                                                                                                                                                         ` Christoph Hellwig
2019-02-04 12:13                                                                                                                                                           ` Christian Zigotzky
2019-02-04 12:38                                                                                                                                                             ` Christoph Hellwig
2019-02-06 13:45                                                                                                                                                               ` Christian Zigotzky
2019-02-06 15:15                                                                                                                                                                 ` Christoph Hellwig
2019-02-06 15:16                                                                                                                                                                   ` Christoph Hellwig
2019-02-07  4:34                                                                                                                                                                     ` Christian Zigotzky
2019-02-08  9:01                                                                                                                                                                       ` Christian Zigotzky
2019-02-08  9:18                                                                                                                                                                         ` Christoph Hellwig
2019-02-08 10:59                                                                                                                                                                           ` Christian Zigotzky
2019-02-10 12:00                                                                                                                                                                           ` Christian Zigotzky
2019-02-11  7:16                                                                                                                                                                             ` Christian Zigotzky
2019-02-11  7:21                                                                                                                                                                               ` Christian Zigotzky
2019-02-11  7:38                                                                                                                                                                             ` Christoph Hellwig
2019-02-12 12:42                                                                                                                                                                               ` Christian Zigotzky
2019-02-12 15:25                                                                                                                                                                                 ` Christoph Hellwig
2019-02-12 19:31                                                                                                                                                                                   ` Christian Zigotzky
2019-02-12 19:50                                                                                                                                                                                     ` Christian Zigotzky
2019-02-12 19:52                                                                                                                                                                                       ` Christoph Hellwig
2019-11-05  7:56                                                                               ` Bug 205201 - overflow of DMA mask and bus mask Christian Zigotzky
2019-11-05 16:28                                                                                 ` Christoph Hellwig
2019-11-06 14:09                                                                                   ` Robin Murphy
2019-11-07  9:53                                                                                   ` Christian Zigotzky
2019-11-10  7:27                                                                                     ` Christian Zigotzky [this message]
2019-11-11  8:12                                                                                       ` Christian Zigotzky
2019-11-11  8:16                                                                                         ` Christian Zigotzky
2019-11-11 12:22                                                                                           ` Christian Zigotzky
2019-11-12 14:41                                                                                             ` Christoph Hellwig
2019-11-12 22:58                                                                                               ` Christian Zigotzky
2019-11-13 10:14                                                                                               ` Christian Zigotzky
2019-11-13 11:02                                                                                                 ` Christoph Hellwig
2018-11-29 17:02     ` use generic DMA mapping code in powerpc V4 Christoph Hellwig
2018-11-30  3:17   ` Benjamin Herrenschmidt
2018-12-08 17:03 ` Christoph Hellwig
2018-12-16 16:51 ` Christoph Hellwig
2018-12-17  1:14   ` Michael Ellerman

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Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-mm/0 linux-mm/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-mm linux-mm/ https://lore.kernel.org/linux-mm \
		linux-mm@kvack.org
	public-inbox-index linux-mm

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kvack.linux-mm


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git