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Message-ID: <Zzi7zR0maqdCC3ME@sashalap> Date: Sat, 16 Nov 2024 10:35:41 -0500 From: Sasha Levin <sashal@...nel.org> To: Vlastimil Babka <vbabka@...e.cz>, brauner@...nel.org, viro@...iv.linux.org.uk Cc: Linus Torvalds <torvalds@...ux-foundation.org>, David Rientjes <rientjes@...gle.com>, Christoph Lameter <cl@...ux.com>, Andrew Morton <akpm@...ux-foundation.org>, "linux-mm@...ck.org" <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>, Roman Gushchin <roman.gushchin@...ux.dev>, Hyeonggon Yoo <42.hyeyoo@...il.com> Subject: Re: [GIT PULL] slab updates for 6.13 [ Obviously I fat-fingered it and didn't add Christian or Al ] On Sat, Nov 16, 2024 at 10:32:23AM -0500, Sasha Levin wrote: >[ Adding Christian and Al ] > >On Fri, Nov 15, 2024 at 03:22:30PM +0100, Vlastimil Babka wrote: >>Hi Linus, >> >>please pull the latest slab updates from: >> >> git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab.git tags/slab-for-6.13 >> >>One new feature and non-critical fixes (mostly related to debugging). >>No conflicts to be expected, AFAIK. > >After merging the last batch of pull requests which included VFS and >SLAB into my linus-next[1] tree I've started seeing consistent boot and >runtime failures both on LKFT[2] and KernelCI[3]. I'm going to start >bisection, but given the amount of content that went in it might take a >day or two. > >It seems that this is something in the interaction between VFS and SLAB: > >Boot failures: > >[ 4.600870] __kmem_cache_create_args(ext4_groupinfo_4k) failed with error -22 >[ 4.602001] CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.12.0-rc7 #1 >[ 4.602644] Hardware name: linux,dummy-virt (DT) >[ 4.603346] Call trace: >[ 4.603594] dump_backtrace+0x108/0x190 >[ 4.604831] show_stack+0x24/0x38 >[ 4.605104] dump_stack_lvl+0x40/0xa0 >[ 4.605472] dump_stack+0x18/0x28 >[ 4.605842] __kmem_cache_create_args+0x21c/0x248 >[ 4.606235] ext4_mb_init+0x118/0x720 >[ 4.606572] ext4_fill_super+0x1550/0x17d8 >[ 4.606890] get_tree_bdev_flags+0x138/0x1d8 >[ 4.607279] get_tree_bdev+0x20/0x38 >[ 4.607643] ext4_get_tree+0x24/0x38 >[ 4.608013] vfs_get_tree+0x3c/0x108 >[ 4.608260] do_new_mount+0x154/0x398 >[ 4.608622] path_mount+0x258/0x4d0 >[ 4.609030] init_mount+0x78/0xc8 >[ 4.609434] do_mount_root+0xd4/0x1b0 >[ 4.609887] mount_root_generic+0x110/0x308 >[ 4.610177] mount_block_root+0x5c/0x78 >[ 4.610428] mount_root+0x74/0xa8 >[ 4.610662] prepare_namespace+0x8c/0xd8 >[ 4.610922] kernel_init_freeable+0x10c/0x160 >[ 4.611197] kernel_init+0x2c/0x1c0 >[ 4.611437] ret_from_fork+0x10/0x20 >[ 4.612106] EXT4-fs: no memory for groupinfo slab cache >[ 4.612757] EXT4-fs (vda): failed to initialize mballoc (-12) > >Runtime failures: > >__kmem_cache_create_args(ext4_groupinfo_1k) failed with error -22 >CPU: 0 UID: 0 PID: 76 Comm: kunit_try_catch Tainted: G N 6.12.0-rc7 #1 >Tainted: [N]=TEST >Hardware name: ARM-Versatile (Device Tree Support) >Call trace: > unwind_backtrace from show_stack+0x10/0x14 > show_stack from dump_stack_lvl+0x34/0x3c > dump_stack_lvl from __kmem_cache_create_args+0x24c/0x2c4 > __kmem_cache_create_args from ext4_mb_init+0xf4/0x690 > ext4_mb_init from mbt_kunit_init+0x394/0x474 > mbt_kunit_init from kunit_try_run_case+0x40/0x1d4 > kunit_try_run_case from kunit_generic_run_threadfn_adapter+0x1c/0x34 > kunit_generic_run_threadfn_adapter from kthread+0xe0/0x10c > kthread from ret_from_fork+0x14/0x28 >Exception stack(0xd0981fb0 to 0xd0981ff8) >1fa0: 00000000 00000000 00000000 00000000 >1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 >1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 >EXT4-fs: no memory for groupinfo slab cache > # test_new_blocks_simple: failed to initialize: -12 >------------[ cut here ]------------ >kernel BUG at fs/ext4/mballoc.c:3283! >Internal error: Oops - BUG: 0 [#1] PREEMPT ARM >Modules linked in: >CPU: 0 UID: 0 PID: 77 Comm: kunit_try_catch Tainted: G N 6.12.0-rc7 #1 >Tainted: [N]=TEST >Hardware name: ARM-Versatile (Device Tree Support) >PC is at ext4_mb_release+0x2f4/0x31c >LR is at mbt_kunit_exit+0x10/0x80 >pc : [<c02239d4>] lr : [<c022e758>] psr: 60000113 >sp : d0985f18 ip : d0985f30 fp : 00000000 >r10: 00000000 r9 : d0811d50 r8 : c17cc000 >r7 : c17cc000 r6 : c16be240 r5 : c1c761c0 r4 : d0811d44 >r3 : ffff0fff r2 : 00000000 r1 : c12d3fc0 r0 : 00000000 >Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none >Control: 00093177 Table: 00004000 DAC: 00000053 >Register r0 information: NULL pointer >Register r1 information: non-slab/vmalloc memory >Register r2 information: NULL pointer >Register r3 information: non-paged memory >Register r4 information: 2-page vmalloc region starting at 0xd0810000 allocated at copy_process+0x170/0xdd4 >Register r5 information: slab task_struct start c1c761c0 pointer offset 0 size 1728 >Register r6 information: slab kmalloc-64 start c16be240 pointer offset 0 size 64 >Register r7 information: slab kmalloc-1k start c17cc000 pointer offset 0 size 1024 >Register r8 information: slab kmalloc-1k start c17cc000 pointer offset 0 size 1024 >Register r9 information: 2-page vmalloc region starting at 0xd0810000 allocated at copy_process+0x170/0xdd4 >Register r10 information: NULL pointer >Register r11 information: NULL pointer >Register r12 information: 2-page vmalloc region starting at 0xd0984000 allocated at copy_process+0x170/0xdd4 >Process kunit_try_catch (pid: 77, stack limit = 0x(ptrval)) >Stack: (0xd0985f18 to 0xd0986000) >5f00: c1440000 00000000 >5f20: c102e680 c1c76638 d0985f68 c0c21734 00000003 00000000 00000004 d0811d44 >5f40: c1c761c0 c16be240 d0811c88 c17cc000 d0811d50 00000000 00000000 c022e758 >5f60: d0811d44 c1c761c0 c16be240 d0811c88 c039be9c d0811d50 00000000 c0399c0c >5f80: d0811d50 c039beb8 c16bf160 c0044a4c c16bf160 c004496c 00000000 00000000 >5fa0: 00000000 00000000 00000000 c000854c 00000000 00000000 00000000 00000000 >5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 >5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000 >Call trace: > ext4_mb_release from mbt_kunit_exit+0x10/0x80 > mbt_kunit_exit from kunit_try_run_case_cleanup+0x30/0x3c > kunit_try_run_case_cleanup from kunit_generic_run_threadfn_adapter+0x1c/0x34 > kunit_generic_run_threadfn_adapter from kthread+0xe0/0x10c > kthread from ret_from_fork+0x14/0x28 >Exception stack(0xd0985fb0 to 0xd0985ff8) >5fa0: 00000000 00000000 00000000 00000000 >5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 >5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 >Code: e3a010c9 e3811c0e eb278c81 eaffff5d (e7f001f2) >---[ end trace 0000000000000000 ]--- > > >[1] https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linus-next.git/log/?h=linus-next >[2] https://qa-reports.linaro.org/lkft/sashal-linus-next/build/v6.11-15430-gc12cd257292c/testrun/25849362/suite/boot/test/clang-19-lkftconfig/log >[3] https://kciapistagingstorage1.file.core.windows.net/early-access/baseline-x86-kcidebug-amd-6738b3dc1a48e7821930a51b/log.txt.gz?sv=2022-11-02&ss=f&srt=sco&sp=r&se=2026-10-18T13:36:18Z&st=2024-10-17T05:36:18Z&spr=https&sig=xFxYOOh5uXJWeN9I3YKAUvpGGQivo89HKZbD78gcxvc%3D > >-- >Thanks, >Sasha > -- Thanks, Sasha
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