[{"id":3685620,"web_url":"http://patchwork.ozlabs.org/comment/3685620/","msgid":"","list_archive_url":null,"date":"2026-05-04T09:54:41","subject":"Re: [LTP] [PATCH v4] clock_settime: use POSIX runtime detection for\n CLOCK_MONOTONIC","submitter":{"id":8530,"url":"http://patchwork.ozlabs.org/api/people/8530/","name":"Cyril Hrubis","email":"chrubis@suse.cz"},"content":"Hi!\n> +#include \n> +#include \n> +#include \n> +#include \n> +\n> +static inline int pts_mono_available(void)\n> +{\n> +#ifdef CLOCK_MONOTONIC\n\nThis one should have stayed _POSIX_MONOTONIC_CLOCK since we are doing a\npresence checks and the -1 is correctly handled here (we get to return 0\ncase in this case).\n\n> +\tif (_POSIX_MONOTONIC_CLOCK > 0)\n> +\t\treturn 1;\n> +\n> +\tif (!_POSIX_MONOTONIC_CLOCK && sysconf(_SC_MONOTONIC_CLOCK) > 0)\n> +\t\treturn 1;\n> +#endif\n> +\treturn 0;\n> +}\n> +\n> +#define PTS_MONO_MAX_RETRIES 3\n> +\n> +static struct timespec pts_mono_start;\n> +\n> +static inline int pts_mono_time_start(void)\n> +{\n> +\tif (!pts_mono_available()) {\n> +\t\tstatic int warned;\n> +\n> +\t\tif (!warned) {\n> +\t\t\tprintf(\"CLOCK_MONOTONIC unavailable, test may fail due to clock adjustment\\n\");\n> +\t\t\twarned = 1;\n> +\t\t}\n> +\t\treturn 0;\n> +\t}\n> +\n> +#ifdef CLOCK_MONOTONIC\n> +\tif (clock_gettime(CLOCK_MONOTONIC, &pts_mono_start) != 0) {\n> +\t\tperror(\"clock_gettime(CLOCK_MONOTONIC) failed\");\n> +\t\treturn -1;\n> +\t}\n> +#endif\n\nThese are guarding againts compilation failures and looks fine to me\nnow.\n\n> +\treturn 0;\n> +}\n> +\n> +static inline int pts_mono_time_check(unsigned int expected_secs)\n> +{\n> +#ifdef CLOCK_MONOTONIC\n> +\tif (pts_mono_available()) {\n> +\t\tstruct timespec now;\n> +\t\tlong elapsed;\n> +\n> +\t\tif (clock_gettime(CLOCK_MONOTONIC, &now) != 0) {\n> +\t\t\tperror(\"clock_gettime(CLOCK_MONOTONIC) failed\");\n> +\t\t\treturn -1;\n> +\t\t}\n> +\n> +\t\telapsed = now.tv_sec - pts_mono_start.tv_sec;\n> +\n> +\t\tif (labs(elapsed - (long)expected_secs) > 1) {\n> +\t\t\tprintf(\"Clock adjustment detected (elapsed %lds, expected ~%us)\\n\",\n> +\t\t\t elapsed, expected_secs);\n> +\t\t\treturn 1;\n> +\t\t}\n> +\t\treturn 0;\n> +\t}\n> +#endif\n> +\t(void)expected_secs;\n> +\treturn 0;\n> +}\n> +\n> +#endif /* PTS_CLOCK_H */\n> \n> ---\n> base-commit: 73cfad509db014e5a631bd2298f4e9d8ea3ee1c1\n> change-id: 20260429-fix_clock_settime_helper-7670708ed94f\n> \n> Best regards,\n> -- \n> Andrea Cervesato \n> \n> \n> -- \n> Mailing list info: https://lists.linux.it/listinfo/ltp","headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","ltp@lists.linux.it"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","ltp@picard.linux.it"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n unprotected) header.d=suse.cz header.i=@suse.cz header.a=rsa-sha256\n header.s=susede2_rsa header.b=HdgD7vOX;\n\tdkim=fail reason=\"signature verification failed\" header.d=suse.cz\n header.i=@suse.cz header.a=ed25519-sha256 header.s=susede2_ed25519\n header.b=aHinx8rV;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key)\n header.d=suse.cz header.i=@suse.cz header.a=rsa-sha256 header.s=susede2_rsa\n header.b=HdgD7vOX;\n\tdkim=neutral header.d=suse.cz header.i=@suse.cz header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=aHinx8rV;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.linux.it\n (client-ip=2001:1418:10:5::2; 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charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Errors-To":"ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it","Sender":"\"ltp\" "}},{"id":3685626,"web_url":"http://patchwork.ozlabs.org/comment/3685626/","msgid":"<69f8734e.5d0a0220.263edd.8881@mx.google.com>","list_archive_url":null,"date":"2026-05-04T10:22:05","subject":"Re: [LTP] [PATCH v4] clock_settime: use POSIX runtime detection for\n CLOCK_MONOTONIC","submitter":{"id":82886,"url":"http://patchwork.ozlabs.org/api/people/82886/","name":"Andrea Cervesato","email":"andrea.cervesato@suse.com"},"content":"> This one should have stayed _POSIX_MONOTONIC_CLOCK since we are doing a\n> presence checks and the -1 is correctly handled here (we get to return 0\n> case in this case).\nIf it's ok, i can merge with this change\n\n--\nAndrea Cervesato\nSUSE QE Automation Engineer Linux\nandrea.cervesato@suse.com","headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","ltp@lists.linux.it"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","ltp@picard.linux.it"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=lists.linux.it header.i=@lists.linux.it\n header.a=rsa-sha256 header.s=picard header.b=b+M7MjwC;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n unprotected) header.d=suse.com header.i=@suse.com header.a=rsa-sha256\n header.s=google header.b=OoRTxkhD;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.linux.it\n (client-ip=2001:1418:10:5::2; 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charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Errors-To":"ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it","Sender":"\"ltp\" "}},{"id":3685629,"web_url":"http://patchwork.ozlabs.org/comment/3685629/","msgid":"","list_archive_url":null,"date":"2026-05-04T10:24:16","subject":"Re: [LTP] [PATCH v4] clock_settime: use POSIX runtime detection for\n CLOCK_MONOTONIC","submitter":{"id":8530,"url":"http://patchwork.ozlabs.org/api/people/8530/","name":"Cyril Hrubis","email":"chrubis@suse.cz"},"content":"Hi!\n> > This one should have stayed _POSIX_MONOTONIC_CLOCK since we are doing a\n> > presence checks and the -1 is correctly handled here (we get to return 0\n> > case in this case).\n> If it's ok, i can merge with this change\n\nYes. With this change:\n\nReviewed-by: Cyril Hrubis ","headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","ltp@lists.linux.it"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","ltp@picard.linux.it"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n unprotected) header.d=suse.cz header.i=@suse.cz header.a=rsa-sha256\n header.s=susede2_rsa header.b=sfHI0sc+;\n\tdkim=fail reason=\"signature verification failed\" header.d=suse.cz\n header.i=@suse.cz header.a=ed25519-sha256 header.s=susede2_ed25519\n header.b=itP70dQk;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key)\n header.d=suse.cz header.i=@suse.cz header.a=rsa-sha256 header.s=susede2_rsa\n header.b=sfHI0sc+;\n\tdkim=neutral header.d=suse.cz header.i=@suse.cz header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=itP70dQk;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.linux.it\n (client-ip=213.254.12.146; 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charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Errors-To":"ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it","Sender":"\"ltp\" "}},{"id":3685633,"web_url":"http://patchwork.ozlabs.org/comment/3685633/","msgid":"<69f87581.7b0a0220.120d47.6573@mx.google.com>","list_archive_url":null,"date":"2026-05-04T10:31:28","subject":"Re: [LTP] [PATCH v4] clock_settime: use POSIX runtime detection for\n CLOCK_MONOTONIC","submitter":{"id":82886,"url":"http://patchwork.ozlabs.org/api/people/82886/","name":"Andrea Cervesato","email":"andrea.cervesato@suse.com"},"content":"Merged, Thanks!\n\n--\nAndrea Cervesato\nSUSE QE Automation Engineer Linux\nandrea.cervesato@suse.com","headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","ltp@lists.linux.it"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","ltp@picard.linux.it"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=lists.linux.it header.i=@lists.linux.it\n header.a=rsa-sha256 header.s=picard header.b=G386iiqo;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n unprotected) header.d=suse.com header.i=@suse.com header.a=rsa-sha256\n header.s=google header.b=DwgiDiXY;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.linux.it\n (client-ip=213.254.12.146; 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