From: Tony Lindgren <tony@atomide.com> To: David Howells <dhowells@redhat.com> Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org, Stephen Rothwell <sfr@canb.auug.org.au> Subject: Regression in next with filesystem context concept Date: Thu, 6 Sep 2018 09:43:58 -0700 [thread overview] Message-ID: <20180906164358.GI5659@atomide.com> (raw) Hi, Looks like next-20180906 now has a regression where mounting root won't work with commit fd0002870b45 ("vfs: Implement a filesystem superblock creation/configuration context"). Here's what happens for me on MMC for example: Waiting for root device /dev/mmcblk0p2... mmc0: host does not support reading read-only switch, assuming write-enable mmc1: new SDIO card at address 0001 mmc0: new high speed SDXC card at address e624 mmcblk0: mmc0:e624 SU64G 59.5 GiB mmcblk0: p1 p2 p3 VFS: Cannot open root device "mmcblk0p2" or unknown-block(179,2): error -2 Please append a correct "root=" boot option; here are the available partitions: ... b302 60298240 mmcblk0p2 000b9930-02 ... Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,2) And NFSroot fails with: Unable to handle kernel NULL pointer dereference at virtual address 00000000 pgd = (ptrval) [00000000] *pgd=00000000 Internal error: Oops: 5 [#1] SMP ARM Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.19.0-rc1-00104-gfd0002870b45 #867 Hardware name: Generic OMAP4 (Flattened Device Tree) PC is at nfs_fs_mount+0x4d4/0x9dc LR is at nfs_fs_mount+0x450/0x9dc pc : [<c04100c0>] lr : [<c041003c>] psr: 60000153 sp : ee8bde10 ip : 00000000 fp : 00000400 r10: 00001000 r9 : 00008001 r8 : 00000000 r7 : eefc7110 r6 : c0d08948 r5 : eefdc000 r4 : eefc7000 r3 : 00000000 r2 : 00000002 r1 : eefc71a0 r0 : eefc710c Flags: nZCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment none Control: 10c5387d Table: 8000404a DAC: 00000051 Process swapper/0 (pid: 1, stack limit = 0x(ptrval)) ... [<c04100c0>] (nfs_fs_mount) from [<c031c4f0>] (legacy_get_tree+0x2c/0xe4) [<c031c4f0>] (legacy_get_tree) from [<c02e014c>] (vfs_get_tree+0x70/0x1a0) [<c02e014c>] (vfs_get_tree) from [<c0305a98>] (do_mount+0x788/0xb18) [<c0305a98>] (do_mount) from [<c03061e4>] (ksys_mount+0x8c/0xb4) [<c03061e4>] (ksys_mount) from [<c0c01988>] (mount_root+0x70/0x158) [<c0c01988>] (mount_root) from [<c0c01bd0>] (prepare_namespace+0x160/0x1c4) [<c0c01bd0>] (prepare_namespace) from [<c0c012a4>] (kernel_init_freeable+0x444/0x4b4) [<c0c012a4>] (kernel_init_freeable) from [<c08f0558>] (kernel_init+0x8/0x114) [<c08f0558>] (kernel_init) from [<c01010b4>] (ret_from_fork+0x14/0x20) Exception stack(0xee8bdfb0 to 0xee8bdff8) dfa0: 00000000 00000000 00000000 00000000 dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 Code: e352000a 1a000001 e6bf3fb3 e1c730b2 (e5d83000) Regards, Tony
next reply other threads:[~2018-09-06 21:20 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-09-06 16:43 Tony Lindgren [this message] 2018-09-06 18:11 ` Naresh Kamboju 2018-09-07 8:47 ` David Howells 2018-09-07 16:10 ` Tony Lindgren 2018-09-07 17:35 ` Andreas Kemnade 2018-09-08 15:24 ` David Howells 2018-09-10 16:08 ` Tony Lindgren 2018-09-10 18:31 ` Guenter Roeck 2018-09-10 19:26 ` Tony Lindgren 2018-09-10 19:32 ` Guenter Roeck
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