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From: Junio C Hamano <gitster@pobox.com>
To: "D. Ben Knoble" <ben.knoble@gmail.com>
Cc: git@vger.kernel.org,  Todd Zullinger <tmz@pobox.com>,
	 Tian Yuchen <cat@malon.dev>,
	 Olamide Caleb Bello <belkid98@gmail.com>,
	 Patrick Steinhardt <ps@pks.im>
Subject: Re: [PATCH v2 3/3] core: convert build-time USE_NSEC into runtime core.useNanosec
Date: Fri, 14 Aug 2026 09:38:15 -0700	[thread overview]
Message-ID: <xmqqzeyoodxk.fsf@gitster.g> (raw)
In-Reply-To: <2d1424732af6af9c82c775e8256ea914204e8e43.1786710807.git.ben.knoble@gmail.com> (D. Ben Knoble's message of "Fri, 14 Aug 2026 08:34:02 -0400")

"D. Ben Knoble" <ben.knoble@gmail.com> writes:

> -#ifdef USE_NSEC
> -	if (cfg->check_stat && sd->sd_mtime.nsec != ST_MTIME_NSEC(*st))
> -		changed |= MTIME_CHANGED;
> -	if (cfg->trust_ctime && cfg->check_stat &&
> -	    sd->sd_ctime.nsec != ST_CTIME_NSEC(*st))
> -		changed |= CTIME_CHANGED;
> -#endif
> +	if (cfg->use_nanosec) {
> +		if (cfg->check_stat && sd->sd_mtime.nsec != ST_MTIME_NSEC(*st))
> +			changed |= MTIME_CHANGED;
> +		if (cfg->trust_ctime && cfg->check_stat &&
> +		    sd->sd_ctime.nsec != ST_CTIME_NSEC(*st))
> +			changed |= CTIME_CHANGED;
> +	}
>  
>  	if (cfg->check_stat) {
>  		if (sd->sd_uid != (unsigned int) st->st_uid ||

This is iffy.

If you have core.usenanosec=true in a networked $HOME/.gitconfig
mounted on both USE_NSEC-capable and incapable platforms, what would
ST_CTIME_NSEC() yield on the latter?  I wonder if cfg's
'.use_nanosec' should be force-disabled in NO_NSEC builds, or
something similar?

      reply	other threads:[~2026-08-14 16:38 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-07 11:56 [PATCH 0/3] Convert USE_NSEC to runtime config D. Ben Knoble
2026-08-07 11:56 ` [PATCH 1/3] meson: expose knob for xmlto relative links in manuals D. Ben Knoble
2026-08-10 12:50   ` Patrick Steinhardt
2026-08-07 11:56 ` [PATCH 2/3] environment: align repo_config_values_init with struct declaration D. Ben Knoble
2026-08-07 11:56 ` [PATCH 3/3] core: convert build-time USE_NSEC into runtime core.useNanosec D. Ben Knoble
2026-08-07 21:17   ` Junio C Hamano
2026-08-08 16:31     ` SZEDER Gábor
2026-08-10 12:27       ` D. Ben Knoble
2026-08-10 12:27     ` D. Ben Knoble
2026-08-10 12:44       ` Patrick Steinhardt
2026-08-11 16:26         ` Ben Knoble
2026-08-13 21:40           ` D. Ben Knoble
2026-08-14 11:06             ` Patrick Steinhardt
2026-08-14 11:29               ` Ben Knoble
2026-08-10 12:50   ` Patrick Steinhardt
2026-08-14 12:33 ` [PATCH v2 0/3] Convert USE_NSEC to runtime config D. Ben Knoble
2026-08-14 12:34   ` [PATCH v2 1/3] meson: expose knob for xmlto relative links in manuals D. Ben Knoble
2026-08-14 12:34   ` [PATCH v2 2/3] environment: align repo_config_values_init with struct declaration D. Ben Knoble
2026-08-14 12:34   ` [PATCH v2 3/3] core: convert build-time USE_NSEC into runtime core.useNanosec D. Ben Knoble
2026-08-14 16:38     ` Junio C Hamano [this message]

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