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Message-ID: <20240928101143.GH967758@unreal> Date: Sat, 28 Sep 2024 13:11:43 +0300 From: Leon Romanovsky <leon@...nel.org> To: David Howells <dhowells@...hat.com> Cc: Christian Brauner <brauner@...nel.org>, Linus Torvalds <torvalds@...ux-foundation.org>, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [GIT PULL] vfs netfs On Fri, Sep 27, 2024 at 09:31:28PM +0100, David Howells wrote: > Leon Romanovsky <leon@...nel.org> wrote: > > > I hope that you mean that we have plenty of time before the merge window ends. > > Otherwise, it will be very inconvenient to open official -next/-rc branches, > > based on -rc1, remembering to revert so many commits. > > Yes, I'm aware of the time, thank you. > > Can you please try the branch at: > > https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/log/?h=netfs-fixes > > see if it fixes your problem? It runs through -g quick with 9p over TCP for > me. I tried it now and it didn't fix my issue. ➜ kernel git:(netfs-fixes) git l 8e18fe180b0a netfs: Abstract out a rolling folio buffer implementation [ 1.506633][ T1] Run /sbin/init as init process [ 1.506800][ T1] with arguments: [ 1.506895][ T1] /sbin/init [ 1.507004][ T1] with environment: [ 1.507104][ T1] HOME=/ [ 1.507201][ T1] TERM=linux [ 1.512981][ T1] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6ce48 [ 1.513934][ T1] flags: 0x4000000000000000(zone=1) [ 1.514142][ T1] raw: 4000000000000000 ffffea0001b39248 ffffea00001583c8 0000000000000000 [ 1.514536][ T1] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 1.514796][ T1] page dumped because: VM_BUG_ON_FOLIO(((unsigned int) folio_ref_count(folio) + 127u <= 127u)) [ 1.515087][ T1] ------------[ cut here ]------------ [ 1.515231][ T1] kernel BUG at include/linux/mm.h:1444! [ 1.515375][ T1] Oops: invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC KASAN [ 1.515596][ T1] CPU: 4 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.11.0+ #2546 [ 1.515823][ T1] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1.516153][ T1] RIP: 0010:__iov_iter_get_pages_alloc+0x16d4/0x2210 [ 1.516345][ T1] Code: 84 f2 fa ff ff 48 89 ef e8 c9 20 98 ff e9 e5 fa ff ff 48 8d 48 ff e9 2c fe ff ff 48 c7 c6 00 eb 21 83 48 89 cf e8 fc 25 8a ff <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 8b 74 24 68 44 8b 5c 24 30 [ 1.516874][ T1] RSP: 0000:ffff8880060f6e40 EFLAGS: 00010286 [ 1.517126][ T1] RAX: 000000000000005c RBX: ffffea0001b39234 RCX: 0000000000000000 [ 1.517434][ T1] RDX: 000000000000005c RSI: 0000000000000004 RDI: ffffed1000c1edbb [ 1.517676][ T1] RBP: dffffc0000000000 R08: 0000000000000000 R09: fffffbfff0718ce0 [ 1.517898][ T1] R10: 0000000000000003 R11: 0000000000000001 R12: ffff88800950f420 [ 1.518111][ T1] R13: ffff88800aba0c00 R14: 0000000000000002 R15: 0000000000001000 [ 1.518321][ T1] FS: 0000000000000000(0000) GS:ffff88806d000000(0000) knlGS:0000000000000000 [ 1.518587][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1.518804][ T1] CR2: 0000000000000000 CR3: 0000000003881001 CR4: 0000000000370eb0 [ 1.519058][ T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1.519302][ T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1.519553][ T1] Call Trace: [ 1.519687][ T1] <TASK> [ 1.519790][ T1] ? __die+0x52/0x8f [ 1.519947][ T1] ? die+0x2a/0x50 [ 1.520107][ T1] ? do_trap+0x1d9/0x2c0 [ 1.520227][ T1] ? __iov_iter_get_pages_alloc+0x16d4/0x2210 [ 1.520421][ T1] ? do_error_trap+0xa3/0x160 [ 1.520599][ T1] ? __iov_iter_get_pages_alloc+0x16d4/0x2210 [ 1.520813][ T1] ? handle_invalid_op+0x2c/0x30 [ 1.520991][ T1] ? __iov_iter_get_pages_alloc+0x16d4/0x2210 [ 1.521245][ T1] ? exc_invalid_op+0x29/0x40 [ 1.521438][ T1] ? asm_exc_invalid_op+0x16/0x20 [ 1.521601][ T1] ? __iov_iter_get_pages_alloc+0x16d4/0x2210 [ 1.521799][ T1] ? iov_iter_extract_pages+0x1ee0/0x1ee0 [ 1.521954][ T1] ? radix_tree_node_alloc.constprop.0+0x16a/0x2c0 [ 1.522148][ T1] ? lock_acquire+0xe2/0x500 [ 1.522308][ T1] ? mark_lock+0xfc/0x2dc0 [ 1.522462][ T1] iov_iter_get_pages_alloc2+0x3d/0xe0 [ 1.522624][ T1] ? print_usage_bug.part.0+0x600/0x600 [ 1.522795][ T1] p9_get_mapped_pages.part.0.constprop.0+0x3bf/0x6c0 [ 1.523025][ T1] ? p9pdu_vwritef+0x320/0x1f20 [ 1.523239][ T1] ? p9_virtio_request+0x550/0x550 [ 1.523427][ T1] ? pdu_read+0xc0/0xc0 [ 1.523551][ T1] ? lock_release+0x220/0x780 [ 1.523714][ T1] ? pdu_read+0xc0/0xc0 [ 1.523824][ T1] p9_virtio_zc_request+0x728/0x1020 [ 1.523975][ T1] ? p9pdu_vwritef+0x320/0x1f20 [ 1.524119][ T1] ? p9_virtio_probe+0xa20/0xa20 [ 1.524271][ T1] ? netfs_read_to_pagecache+0x600/0xd90 [ 1.524424][ T1] ? mark_lock+0xfc/0x2dc0 [ 1.524586][ T1] ? p9pdu_finalize+0xdc/0x1d0 [ 1.524762][ T1] ? p9_client_prepare_req+0x235/0x360 [ 1.524918][ T1] ? p9_tag_alloc+0x6e0/0x6e0 [ 1.525084][ T1] ? lock_release+0x220/0x780 [ 1.525241][ T1] p9_client_zc_rpc.constprop.0+0x236/0x7d0 [ 1.525434][ T1] ? __create_object+0x5e/0x80 [ 1.525595][ T1] ? p9_client_flush.isra.0+0x390/0x390 [ 1.525746][ T1] ? lockdep_hardirqs_on_prepare+0x268/0x3e0 [ 1.525911][ T1] ? __call_rcu_common.constprop.0+0x475/0xc80 [ 1.526092][ T1] ? p9_req_put+0x17a/0x200 [ 1.526226][ T1] p9_client_read_once+0x343/0x840 [ 1.526361][ T1] ? p9_client_getlock_dotl+0x3c0/0x3c0 [ 1.526501][ T1] p9_client_read+0xf1/0x150 [ 1.526649][ T1] v9fs_issue_read+0x107/0x300 [ 1.526788][ T1] ? v9fs_issue_write+0x140/0x140 [ 1.526934][ T1] ? __rwlock_init+0x150/0x150 [ 1.527073][ T1] ? lockdep_hardirqs_on_prepare+0x268/0x3e0 [ 1.527249][ T1] netfs_read_to_pagecache+0x600/0xd90 [ 1.527396][ T1] netfs_readahead+0x47a/0x960 [ 1.527552][ T1] read_pages+0x17b/0xaf0 [ 1.527676][ T1] ? lru_move_tail+0x8f0/0x8f0 [ 1.527842][ T1] ? file_ra_state_init+0xd0/0xd0 [ 1.528004][ T1] page_cache_ra_unbounded+0x324/0x5f0 [ 1.528167][ T1] filemap_get_pages+0x597/0x16b0 [ 1.528324][ T1] ? filemap_add_folio+0x140/0x140 [ 1.528476][ T1] ? lock_is_held_type+0x81/0xe0 [ 1.528637][ T1] filemap_read+0x2ec/0xa90 [ 1.528799][ T1] ? filemap_get_pages+0x16b0/0x16b0 [ 1.528969][ T1] ? 0xffffffff81000000 [ 1.529090][ T1] ? find_held_lock+0x2d/0x110 [ 1.529286][ T1] ? lock_is_held_type+0x81/0xe0 [ 1.529437][ T1] ? down_read_interruptible+0x1f6/0x490 [ 1.529601][ T1] ? down_read+0x450/0x450 [ 1.529748][ T1] ? lockdep_hardirqs_on_prepare+0x3e0/0x3e0 [ 1.529953][ T1] ? find_held_lock+0x2d/0x110 [ 1.530098][ T1] netfs_buffered_read_iter+0xe2/0x130 [ 1.530254][ T1] ? netfs_file_read_iter+0xb2/0x130 [ 1.530398][ T1] __kernel_read+0x2db/0x8a0 [ 1.530554][ T1] ? __x64_sys_lseek+0x1d0/0x1d0 [ 1.530700][ T1] bprm_execve+0x548/0x1410 [ 1.530864][ T1] ? setup_arg_pages+0xb40/0xb40 [ 1.531007][ T1] ? __cond_resched+0x17/0x70 [ 1.531152][ T1] kernel_execve+0x26a/0x2f0 [ 1.531296][ T1] try_to_run_init_process+0xf/0x30 [ 1.531445][ T1] ? rest_init+0x1b0/0x1b0 [ 1.531595][ T1] kernel_init+0xe2/0x140 [ 1.531704][ T1] ? _raw_spin_unlock_irq+0x24/0x30 [ 1.531862][ T1] ret_from_fork+0x2d/0x70 [ 1.532013][ T1] ? rest_init+0x1b0/0x1b0 [ 1.532162][ T1] ret_from_fork_asm+0x11/0x20 [ 1.532342][ T1] </TASK> [ 1.532463][ T1] Modules linked in: [ 1.532679][ T1] ---[ end trace 0000000000000000 ]--- [ 1.532827][ T1] RIP: 0010:__iov_iter_get_pages_alloc+0x16d4/0x2210 [ 1.533109][ T1] Code: 84 f2 fa ff ff 48 89 ef e8 c9 20 98 ff e9 e5 fa ff ff 48 8d 48 ff e9 2c fe ff ff 48 c7 c6 00 eb 21 83 48 89 cf e8 fc 25 8a ff <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 8b 74 24 68 44 8b 5c 24 30 [ 1.533633][ T1] RSP: 0000:ffff8880060f6e40 EFLAGS: 00010286 [ 1.533847][ T1] RAX: 000000000000005c RBX: ffffea0001b39234 RCX: 0000000000000000 [ 1.534054][ T1] RDX: 000000000000005c RSI: 0000000000000004 RDI: ffffed1000c1edbb [ 1.534261][ T1] RBP: dffffc0000000000 R08: 0000000000000000 R09: fffffbfff0718ce0 [ 1.534459][ T1] R10: 0000000000000003 R11: 0000000000000001 R12: ffff88800950f420 [ 1.534668][ T1] R13: ffff88800aba0c00 R14: 0000000000000002 R15: 0000000000001000 [ 1.534878][ T1] FS: 0000000000000000(0000) GS:ffff88806d000000(0000) knlGS:0000000000000000 [ 1.535129][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1.535309][ T1] CR2: 0000000000000000 CR3: 0000000003881001 CR4: 0000000000370eb0 [ 1.535517][ T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1.535734][ T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1.535953][ T1] ------------[ cut here ]------------ > > David >
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