linux-kernel - Re: [PATCH] kbuild: Run syncconfig with -s

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Message-ID: <20200914133559.GA126210@localhost.localdomain>
Date:   Mon, 14 Sep 2020 16:35:59 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     mingo@...nel.org
Cc:     linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org,
        masahiroy@...nel.org
Subject: Re: [PATCH] kbuild: Run syncconfig with -s

> BTW., there's another, rather spurious bug I recently triggered in kbuild.
> 
> Occasionally when I Ctrl-C a kernel build on a system with a lot of CPUs, 
> the .o.cmd file gets corrupted:

Those are temporary files, truncated at page boundary.

	$ stat -c %s XXX.pata_sil680.mod.o.cmd
	12288

I tried to fix this by inserting shell 'trap' directive but it failed
somewhere else.

	cmd_and_fixdep =                                                     \
        $(cmd);                                                              \
        scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' > $(dot-target).cmd;\
        rm -f $(depfile)