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Thu, 28 Nov 2024 15:47:09 +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 hC8gEH2QSGdhLgAAD6G6ig (envelope-from ); Thu, 28 Nov 2024 15:47:09 +0000 Content-Type: multipart/mixed; boundary="------------P0xzCZ0cKZ0v1KO4CcaVotQX" Message-ID: Date: Thu, 28 Nov 2024 16:47:08 +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-Spam-Score: -3.10 X-Spamd-Result: default: False [-3.10 / 50.00]; BAYES_HAM(-3.00)[100.00%]; MIME_BASE64_TEXT_BOGUS(1.00)[]; NEURAL_HAM_LONG(-0.90)[-0.905]; NEURAL_HAM_SHORT(-0.20)[-0.992]; MIME_BASE64_TEXT(0.10)[]; MIME_GOOD(-0.10)[multipart/mixed,text/plain,text/x-patch]; MID_RHS_MATCH_FROM(0.00)[]; TO_DN_SOME(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FREEMAIL_TO(0.00)[gmail.com]; ARC_NA(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:+]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; FUZZY_BLOCKED(0.00)[rspamd.com]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_FIVE(0.00)[6]; RCVD_TLS_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:mid,suse.de:email,imap1.dmz-prg2.suse.org:helo]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; HAS_ATTACHMENT(0.00)[] X-Spam-Flag: NO X-Spam-Level: This is a multi-part message in MIME format. --------------P0xzCZ0cKZ0v1KO4CcaVotQX Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hi Am 11.11.24 um 14:42 schrieb Nuno Gonçalves: > On Mon, Nov 11, 2024 at 1:22 PM Thomas Zimmermann wrote: >> The patch in question changes the whole memory management of the >> affected code. It's also noteworthy that most of it has been reworked >> for the upcoming v6.12. Maybe this already fixed the problem. Kernel >> v6.11-rc7 added commit 5a498d4d06d6 ("drm/fbdev-dma: Only install >> deferred I/O if necessary"), which possibly fixes the problem as well. >> >> But there's no explicit fix for this problem and I have not seen any >> other related reports. Any further information is welcome. > Issue was present since 5ab91447aa13b8b98bc11f5326f33500b0ee2c48 and > tested until 6.12-rc3. > Is there any suggestion on how to dig down? 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. Best regards Thomas > > Thanks -- -- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Frankenstrasse 146, 90461 Nuernberg, Germany GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman HRB 36809 (AG Nuernberg) --------------P0xzCZ0cKZ0v1KO4CcaVotQX Content-Type: text/x-patch; charset=UTF-8; name="0001-fbdev-dma-Support-deferred-I-O-without-smem_start.patch" Content-Disposition: attachment; filename*0="0001-fbdev-dma-Support-deferred-I-O-without-smem_start.patch" Content-Transfer-Encoding: base64 RnJvbSA0MGQ0ODEyNjY0OTc0MzdlYmFhNTMxMmM5YWY5NjQxMzYxYjE3MmY4IE1vbiBTZXAg MTcgMDA6MDA6MDAgMjAwMQpGcm9tOiBUaG9tYXMgWmltbWVybWFubiA8dHppbW1lcm1hbm5A c3VzZS5kZT4KRGF0ZTogVGh1LCAyOCBOb3YgMjAyNCAxNDoyNTowMyArMDEwMApTdWJqZWN0 OiBbUEFUQ0hdIGZiZGV2LWRtYTogU3VwcG9ydCBkZWZlcnJlZCBJL08gd2l0aG91dCBzbWVt X3N0YXJ0CgpTaWduZWQtb2ZmLWJ5OiBUaG9tYXMgWmltbWVybWFubiA8dHppbW1lcm1hbm5A c3VzZS5kZT4KLS0tCiBkcml2ZXJzL2dwdS9kcm0vZHJtX2ZiZGV2X2RtYS5jIHwgMjQgKysr KysrKysrKysrKysrKysrKysrKysrCiAxIGZpbGUgY2hhbmdlZCwgMjQgaW5zZXJ0aW9ucygr KQoKZGlmZiAtLWdpdCBhL2RyaXZlcnMvZ3B1L2RybS9kcm1fZmJkZXZfZG1hLmMgYi9kcml2 ZXJzL2dwdS9kcm0vZHJtX2ZiZGV2X2RtYS5jCmluZGV4IGIxNGI1ODFjMDU5ZC4uNmE5NGQx YjYyNDc5IDEwMDY0NAotLS0gYS9kcml2ZXJzL2dwdS9kcm0vZHJtX2ZiZGV2X2RtYS5jCisr KyBiL2RyaXZlcnMvZ3B1L2RybS9kcm1fZmJkZXZfZG1hLmMKQEAgLTgsNiArOCw3IEBACiAj aW5jbHVkZSA8ZHJtL2RybV9mYl9oZWxwZXIuaD4KICNpbmNsdWRlIDxkcm0vZHJtX2ZyYW1l YnVmZmVyLmg+CiAjaW5jbHVkZSA8ZHJtL2RybV9nZW1fZG1hX2hlbHBlci5oPgorI2luY2x1 ZGUgPGRybS9kcm1fZ2VtX2ZyYW1lYnVmZmVyX2hlbHBlci5oPgogCiAvKgogICogc3RydWN0 IGZiX29wcwpAQCAtMTI0LDYgKzEyNSwyOCBAQCBzdGF0aWMgY29uc3Qgc3RydWN0IGRybV9m Yl9oZWxwZXJfZnVuY3MgZHJtX2ZiZGV2X2RtYV9oZWxwZXJfZnVuY3MgPSB7CiAJLmZiX2Rp cnR5ID0gZHJtX2ZiZGV2X2RtYV9oZWxwZXJfZmJfZGlydHksCiB9OwogCitzdGF0aWMgc3Ry dWN0IHBhZ2UgKmRybV9mYmRldl9kbWFfZ2V0X3BhZ2Uoc3RydWN0IGZiX2luZm8gKmluZm8s IHVuc2lnbmVkIGxvbmcgb2Zmc2V0KQoreworCXN0cnVjdCBkcm1fZmJfaGVscGVyICpmYl9o ZWxwZXIgPSBpbmZvLT5wYXI7CisJc3RydWN0IGRybV9mcmFtZWJ1ZmZlciAqZmIgPSBmYl9o ZWxwZXItPmZiOworCXN0cnVjdCBkcm1fZ2VtX29iamVjdCAqb2JqID0gZHJtX2dlbV9mYl9n ZXRfb2JqKGZiLCAwKTsKKwljb25zdCB2b2lkICphZGRyID0gaW5mby0+c2NyZWVuX2J1ZmZl ciArIG9mZnNldDsKKwlzdHJ1Y3QgcGFnZSAqcGFnZSA9IE5VTEw7CisKKwlpZiAoZmJfV0FS Tl9PTl9PTkNFKGluZm8sIG9mZnNldCA+IG9iai0+c2l6ZSkpCisJCXJldHVybiBOVUxMOwor CisJaWYgKGlzX3ZtYWxsb2NfYWRkcihhZGRyKSkKKwkJcGFnZSA9IHZtYWxsb2NfdG9fcGFn ZShhZGRyKTsKKwllbHNlIGlmICh2aXJ0X2FkZHJfdmFsaWQoYWRkcikpCisJCXBhZ2UgPSB2 aXJ0X3RvX3BhZ2UoYWRkcik7CisKKwlpZiAoIWZiX1dBUk5fT05fT05DRShpbmZvLCAhcGFn ZSkpCisJCWdldF9wYWdlKHBhZ2UpOworCisJcmV0dXJuIHBhZ2U7Cit9CisKIC8qCiAgKiBz dHJ1Y3QgZHJtX2ZiX2hlbHBlcgogICovCkBAIC0yMTcsNiArMjQwLDcgQEAgaW50IGRybV9m YmRldl9kbWFfZHJpdmVyX2ZiZGV2X3Byb2JlKHN0cnVjdCBkcm1fZmJfaGVscGVyICpmYl9o ZWxwZXIsCiAJLyogZGVmZXJyZWQgSS9PICovCiAJaWYgKHVzZV9kZWZlcnJlZF9pbykgewog CQlmYl9oZWxwZXItPmZiZGVmaW8uZGVsYXkgPSBIWiAvIDIwOworCQlmYl9oZWxwZXItPmZi ZGVmaW8uZ2V0X3BhZ2UgPSBkcm1fZmJkZXZfZG1hX2dldF9wYWdlOwogCQlmYl9oZWxwZXIt PmZiZGVmaW8uZGVmZXJyZWRfaW8gPSBkcm1fZmJfaGVscGVyX2RlZmVycmVkX2lvOwogCiAJ CWluZm8tPmZiZGVmaW8gPSAmZmJfaGVscGVyLT5mYmRlZmlvOwotLSAKMi40Ny4wCgo= --------------P0xzCZ0cKZ0v1KO4CcaVotQX--