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Mon, 2 Dec 2024 11:18:04 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id 5z+/C2yXTWeiXwAAD6G6ig (envelope-from ); Mon, 02 Dec 2024 11:18:04 +0000 Content-Type: multipart/mixed; boundary="------------GbLaq8CXTuuMdOErgUblW0r0" Message-ID: <9c902ac0-a94d-4465-98ff-840132e482b1@suse.de> Date: Mon, 2 Dec 2024 12:18:03 +0100 Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: drm/fbdev-dma: regression To: =?UTF-8?Q?Nuno_Gon=C3=A7alves?= Cc: Thorsten Leemhuis , Linux kernel regressions list , dri-devel@lists.freedesktop.org, LKML , Linux Framebuffer References: <20220621104617.8817-1-tzimmermann@suse.de> Content-Language: en-US From: Thomas Zimmermann Autocrypt: addr=tzimmermann@suse.de; keydata= xsBNBFs50uABCADEHPidWt974CaxBVbrIBwqcq/WURinJ3+2WlIrKWspiP83vfZKaXhFYsdg XH47fDVbPPj+d6tQrw5lPQCyqjwrCPYnq3WlIBnGPJ4/jreTL6V+qfKRDlGLWFjZcsrPJGE0 BeB5BbqP5erN1qylK9i3gPoQjXGhpBpQYwRrEyQyjuvk+Ev0K1Jc5tVDeJAuau3TGNgah4Yc hdHm3bkPjz9EErV85RwvImQ1dptvx6s7xzwXTgGAsaYZsL8WCwDaTuqFa1d1jjlaxg6+tZsB 9GluwvIhSezPgnEmimZDkGnZRRSFiGP8yjqTjjWuf0bSj5rUnTGiyLyRZRNGcXmu6hjlABEB AAHNJ1Rob21hcyBaaW1tZXJtYW5uIDx0emltbWVybWFubkBzdXNlLmRlPsLAjgQTAQgAOAIb AwULCQgHAgYVCgkICwIEFgIDAQIeAQIXgBYhBHIX+6yM6c9jRKFo5WgNwR1TC3ojBQJftODH AAoJEGgNwR1TC3ojx1wH/0hKGWugiqDgLNXLRD/4TfHBEKmxIrmfu9Z5t7vwUKfwhFL6hqvo lXPJJKQpQ2z8+X2vZm/slsLn7J1yjrOsoJhKABDi+3QWWSGkaGwRJAdPVVyJMfJRNNNIKwVb U6B1BkX2XDKDGffF4TxlOpSQzdtNI/9gleOoUA8+jy8knnDYzjBNOZqLG2FuTdicBXblz0Mf vg41gd9kCwYXDnD91rJU8tzylXv03E75NCaTxTM+FBXPmsAVYQ4GYhhgFt8S2UWMoaaABLDe 7l5FdnLdDEcbmd8uLU2CaG4W2cLrUaI4jz2XbkcPQkqTQ3EB67hYkjiEE6Zy3ggOitiQGcqp j//OwE0EWznS4AEIAMYmP4M/V+T5RY5at/g7rUdNsLhWv1APYrh9RQefODYHrNRHUE9eosYb T6XMryR9hT8XlGOYRwKWwiQBoWSDiTMo/Xi29jUnn4BXfI2px2DTXwc22LKtLAgTRjP+qbU6 3Y0xnQN29UGDbYgyyK51DW3H0If2a3JNsheAAK+Xc9baj0LGIc8T9uiEWHBnCH+RdhgATnWW GKdDegUR5BkDfDg5O/FISymJBHx2Dyoklv5g4BzkgqTqwmaYzsl8UxZKvbaxq0zbehDda8lv hFXodNFMAgTLJlLuDYOGLK2AwbrS3Sp0AEbkpdJBb44qVlGm5bApZouHeJ/+n+7r12+lqdsA EQEAAcLAdgQYAQgAIAIbDBYhBHIX+6yM6c9jRKFo5WgNwR1TC3ojBQJftOH6AAoJEGgNwR1T C3ojVSkIALpAPkIJPQoURPb1VWjh34l0HlglmYHvZszJWTXYwavHR8+k6Baa6H7ufXNQtThR yIxJrQLW6rV5lm7TjhffEhxVCn37+cg0zZ3j7zIsSS0rx/aMwi6VhFJA5hfn3T0TtrijKP4A SAQO9xD1Zk9/61JWk8OysuIh7MXkl0fxbRKWE93XeQBhIJHQfnc+YBLprdnxR446Sh8Wn/2D Ya8cavuWf2zrB6cZurs048xe0UbSW5AOSo4V9M0jzYI4nZqTmPxYyXbm30Kvmz0rYVRaitYJ 4kyYYMhuULvrJDMjZRvaNe52tkKAvMevcGdt38H4KSVXAylqyQOW5zvPc4/sq9c= In-Reply-To: X-Rspamd-Queue-Id: 6DF1A1F444 X-Spam-Score: -3.41 X-Rspamd-Action: no action X-Spamd-Result: default: False [-3.41 / 50.00]; BAYES_HAM(-3.00)[100.00%]; MIME_BASE64_TEXT_BOGUS(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[multipart/mixed,text/plain,text/x-patch]; MIME_BASE64_TEXT(0.10)[]; MX_GOOD(-0.01)[]; FUZZY_BLOCKED(0.00)[rspamd.com]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FREEMAIL_TO(0.00)[gmail.com]; ARC_NA(0.00)[]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; TO_DN_SOME(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:+]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_TLS_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_FIVE(0.00)[6]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; DKIM_TRACE(0.00)[suse.de:+]; HAS_ATTACHMENT(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:dkim,suse.de:mid,suse.de:email,imap1.dmz-prg2.suse.org:rdns,imap1.dmz-prg2.suse.org:helo] X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Spam-Flag: NO X-Spam-Level: This is a multi-part message in MIME format. --------------GbLaq8CXTuuMdOErgUblW0r0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hi Am 29.11.24 um 00:37 schrieb Nuno Gonçalves: >> Here's a first attempt to address this bug. Could you please apply the >> attached patch and report on the results? It should work against the >> upcoming v6.13-rc1 or against a recent drm-misc-next. > Hi. No luck yet. Thanks for testing. Attached is another patch. It attempts to restore the fbdev handling as before the regression. Please give it a try. Best regards Thomas > > I collected crashes before the patch: > > BUG: Bad page map in process husband pte:60000001b46fcb pmd:800000002736403 > page: refcount:1 mapcount:-1 mapping:000000005cb4182c index:0x6 pfn:0x1b46 > aops:0xffff8000807722e0 ino:15 dentry name(?):"fb0" > flags: 0x14(referenced|dirty|zone=0) > raw: 0000000000000014 dead000000000100 dead000000000122 ffff0000018cf348 > raw: 0000000000000006 0000000000000000 00000001fffffffe 0000000000000000 > page dumped because: bad pte > addr:0000ffff87b4e000 vm_flags:040400fb anon_vma:0000000000000000 > mapping:ffff0000018cf348 index:6 > file:fb0 fault:fb_deferred_io_fault mmap:fb_mmap read_folio:0x0 > CPU: 2 UID: 0 PID: 313 Comm: husband Not tainted 6.12.0 #1 > Hardware name: Raspberry Pi Compute Module 3 Rev 1.0 (DT) > Call trace: > show_stack+0x18/0x30 (C) > dump_stack_lvl+0x60/0x80 > dump_stack+0x18/0x24 > print_bad_pte+0x174/0x1d0 > unmap_page_range+0x47c/0xc90 > unmap_vmas+0xa4/0x100 > exit_mmap+0xbc/0x2c0 > mmput+0x70/0x190 > do_exit+0x248/0x8f0 > do_group_exit+0x34/0x90 > get_signal+0x834/0x860 > do_signal+0xf4/0x330 > do_notify_resume+0xc0/0x140 > el0_svc+0xb8/0xd0 > el0t_64_sync_handler+0x10c/0x140 > el0t_64_sync+0x198/0x19c > Disabling lock debugging due to kernel taint > > And after the patch: > > lk_smartMem abort info: > /tmp/0c ESR = 0x0000000096000044 > 8081f6-1 EC = 0x25: DABT (current EL), IL = 32 bits > 165-4fd2 SET = 0, FnV = 0 > -5e4e03b EA = 0, S1PTW = 0 > e-57fa8e FSC = 0x04: level 0 translation fault > 22.dmp > Data abort info: > ISV = 0, ISS = 0x00000044, ISS2 = 0x00000000 > CM = 0, WnR = 1, TnD = 0, TagAccess = 0 > GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 > [ffbf801f8e7bf010] address between user and kernel address ranges > Internal error: Oops: 0000000096000044 [#1] SMP > CPU: 1 UID: 0 PID: 260 Comm: husband Not tainted 6.12.0 #1 > Hardware name: Raspberry Pi Compute Module 3 Rev 1.0 (DT) > pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) > pc : tlb_remove_table+0xc8/0x1c0 > lr : tlb_remove_table+0xc0/0x1c0 > sp : ffff80008117b9d0 > x29: ffff80008117b9d0 x28: ffff80008117bb98 x27: 0000aaaad1df8000 > x26: 0000aaaad1df7fff x25: ffff0000044f4468 x24: 00000000ffffffdb > x23: fffffdffc008f2c0 x22: ffff8000808a1860 x21: 0000aaaad1c00000 > x20: fffffdffc008f2c0 x19: ffff80008117bb98 x18: ffff80008117bb50 > x17: ffffffffffffffff x16: 0000000000000000 x15: ffff8000807b62a8 > x14: 0000ffffb7640fff x13: 0000000000000000 x12: 0000000000000000 > x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000037b6f > x8 : ffff80008094a0e7 x7 : 0000000000000800 x6 : 0000000000000000 > x5 : 0000000000000801 x4 : dead000000000122 x3 : 0000000000000000 > x2 : 0000020040000000 x1 : ffff000000000000 x0 : ffbf801f8e7bf000 > Call trace: > tlb_remove_table+0xc8/0x1c0 (P) > tlb_remove_table+0xc0/0x1c0 (L) > free_pgd_range+0x228/0x5d0 > free_pgtables+0x1c4/0x270 > exit_mmap+0x130/0x2c0 > mmput+0x70/0x190 > do_exit+0x248/0x8f0 > do_group_exit+0x34/0x90 > get_signal+0x834/0x860 > do_signal+0x118/0x330 > do_notify_resume+0xc0/0x140 > el0_svc+0xb8/0xd0 > el0t_64_sync_handler+0x10c/0x140 > el0t_64_sync+0x198/0x19c > Code: 52850000 94006fdd f9000660 b4000080 (b900101f) > ---[ end trace 0000000000000000 ]--- > Fixing recursive fault but reboot is needed! > Unable to handle kernel NULL pointer dereference at virtual address > 0000000000000008 > Mem abort info: > ESR = 0x0000000096000044 > EC = 0x25: DABT (current EL), IL = 32 bits > SET = 0, FnV = 0 > EA = 0, S1PTW = 0 > FSC = 0x04: level 0 translation fault > Data abort info: > ISV = 0, ISS = 0x00000044, ISS2 = 0x00000000 > CM = 0, WnR = 1, TnD = 0, TagAccess = 0 > GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 > user pgtable: 4k pages, 48-bit VAs, pgdp=000000000238c000 > [0000000000000008] pgd=0000000000000000, p4d=0000000000000000 > Internal error: Oops: 0000000096000044 [#2] SMP > CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G D 6.12.0 #1 > Tainted: [D]=DIE > Hardware name: Raspberry Pi Compute Module 3 Rev 1.0 (DT) > pstate: a0000005 (NzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) > pc : free_unref_page_commit+0x70/0x2c0 > lr : free_unref_page+0x17c/0x400 > sp : ffff800080003da0 > x29: ffff800080003da0 x28: 0000000000000000 x27: 0000000000000000 > x26: 0000000000000000 x25: ffff00003e39e0b8 x24: 0000000000000000 > x23: 0000000000000000 x22: 00000000ffffffff x21: ffff00003e39efc0 > x20: 0000000000000000 x19: ffff800080add340 x18: ffff800081163c40 > x17: ffff7fffbda55000 x16: ffff800080000000 x15: 0000000000001900 > x14: 00000f423fffe700 x13: 0000000000000000 x12: ffff00003e39efc0 > x11: 0000000000000001 x10: 0000000000000001 x9 : ffff7fffbda55000 > x8 : fffffdffc00e81c8 x7 : ffff00003e39efe0 x6 : 0000000000000020 > x5 : ffff00003e39efc0 x4 : 00000000ffffffff x3 : 0000000000000000 > x2 : fffffdffc00e81c0 x1 : 0000000000000000 x0 : ffff800080add340 > Call trace: > free_unref_page_commit+0x70/0x2c0 (P) > free_unref_page+0x17c/0x400 (L) > free_unref_page+0x17c/0x400 > __folio_put+0x50/0xb0 > tlb_remove_table_rcu+0xb0/0xc0 > rcu_core+0x1f4/0x520 > rcu_core_si+0x10/0x20 > handle_softirqs+0xf4/0x230 > __do_softirq+0x14/0x20 > ____do_softirq+0x10/0x20 > call_on_irq_stack+0x24/0x54 > do_softirq_own_stack+0x1c/0x30 > __irq_exit_rcu+0xc8/0x100 > irq_exit_rcu+0x10/0x20 > el1_interrupt+0x38/0x60 > el1h_64_irq_handler+0x18/0x30 > el1h_64_irq+0x6c/0x70 > default_idle_call+0x28/0x3c (P) > default_idle_call+0x24/0x3c (L) > do_idle+0x9c/0xf0 > cpu_startup_entry+0x34/0x40 > rest_init+0xb8/0xc0 > do_one_initcall+0x0/0x16c > __primary_switched+0x88/0x90 > Code: 8b2ac0e7 f8296827 8b0600a7 f9401181 (f9000428) > ---[ end trace 0000000000000000 ]--- > Kernel panic - not syncing: Oops: Fatal exception in interrupt > SMP: stopping secondary CPUs > Kernel Offset: disabled > CPU features: 0x000,00000c00,00800000,0200420b > Memory Limit: none > ---[ end Kernel panic - not syncing: Oops: Fatal exception in interrupt ]--- > > Thanks, > Nuno -- -- Thomas Zimmermann Graphics 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