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[86.59.175.59]) by smtp.gmail.com with ESMTPSA id f18sm1476331ejz.119.2021.06.03.05.43.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 03 Jun 2021 05:43:59 -0700 (PDT) Sender: Ingo Molnar Date: Thu, 3 Jun 2021 14:43:57 +0200 From: Ingo Molnar To: Masahiro Yamada Cc: Michal Marek , Linux Kernel Mailing List Subject: Re: kbuild: Ctrl-C of parallel kernel build sometimes corrupts .o.cmd files permanently Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Ingo Molnar wrote: > > CC security/keys/keyctl_pkey.o > > CC kernel/sys.o > > CC arch/x86/power/hibernate_64.o > > ^Cmake[5]: *** Deleting file 'drivers/video/fbdev/core/fbcmap.o' <---- Deleting > > make[5]: *** [scripts/Makefile.build:272: > > drivers/video/fbdev/core/fbmon.o] Interrupt > > make[3]: *** [scripts/Makefile.build:272: security/selinux/nlmsgtab.o] Interrupt > > make[2]: *** [scripts/Makefile.build:272: arch/x86/power/cpu.o] Interrupt > > make[2]: *** [scripts/Makefile.build:272: > > Interestingly I don't get *any* interruption messages at all: > > CC drivers/dma/dw/acpi.o > CC sound/pci/ice1712/ice1712.o > CC drivers/char/ipmi/ipmi_watchdog.o > CC fs/overlayfs/export.o > CC fs/nls/nls_cp936.o > CC drivers/char/ipmi/ipmi_poweroff.o > ^Ckepler:~/tip> > > The '^C' there - it just stops, make never prints anything for me. Found something - seems to be related whether the build is going into a pipe or not. I usually build this way (directly or via a script): make -j96 bzImage ARCH=x86 2>&1 | tee e Ctrl-C interruption is not handled by kbuild in this case: CC fs/jffs2/xattr_trusted.o CC sound/firewire/motu/motu-transaction.o CC sound/usb/clock.o ^Ckepler:~/tip> Immediate prompt - no cleanup sequence. But if I do it without 'tee', I get the expected cleanup sequence by make: kepler:~/tip> make -j96 bzImage ARCH=x86 2>&1 CC fs/jffs2/acl.o CC sound/pci/echoaudio/mona.o CC fs/nls/nls_iso8859-9.o ^Cmake[2]: *** Deleting file 'drivers/reset/core.o' make[3]: *** Deleting file 'sound/pci/mixart/mixart.o' make[3]: *** Deleting file 'sound/pci/emu10k1/voice.o' make[2]: *** Deleting file 'fs/gfs2/aops.o' Thanks, Ingo