On Thu, Apr 8, 2021 at 9:11 PM Sedat Dilek <sedat.dilek@xxxxxxxxx> wrote: > > On Thu, Apr 8, 2021 at 9:04 PM Sedat Dilek <sedat.dilek@xxxxxxxxx> wrote: > > > > Hi, > > > > I tried this patch together with my build-script which uses builddeb > > to generate Debian packages. > > > > Currently, I test a setup with Clang-LTO + DWARF-v5 (and BTF). > > > > With this patch I get total strange numbers. > > > > The Kconfig changes to my previous kernel of today: > > > > $ scripts/diffconfig /boot/config-5.12.0-rc6-3-amd64-clang12-lto > > /boot/config-5.12.0-rc6-4-amd64-clang12-lto > > BUILD_SALT "5.12.0-rc6-3-amd64-clang12-lto" -> "5.12.0-rc6-4-amd64-clang12-lto" > > MODULE_COMPRESS_NONE y -> n > > MODULE_COMPRESS_ZSTD n -> y > > > > The generated linux-image Debian package is greater in size than the > > linux-image DEBUG package. > > Normally, this is vice-versa. > > > > With: > > > > $ du -s -m linux-image-5.12.0-rc6-4-amd64-clang12-lto* > > 969 linux-image-5.12.0-rc6-4-amd64-clang12-lto_5.12.0~rc6-4~bullseye+dileks1_amd64.deb > > 97 linux-image-5.12.0-rc6-4-amd64-clang12-lto-dbg_5.12.0~rc6-4~bullseye+dileks1_amd64.deb > > (DEBUG) > > > > Without: > > > > $ du -s -m linux-image-5.12.0-rc6-3-amd64-clang12-lto* > > 60 linux-image-5.12.0-rc6-3-amd64-clang12-lto_5.12.0~rc6-3~bullseye+dileks1_amd64.deb > > 599 linux-image-5.12.0-rc6-3-amd64-clang12-lto-dbg_5.12.0~rc6-3~bullseye+dileks1_amd64.deb > > (DEBUG) > > > > The kernel-modules directory numbers: > > > > With: > > > > # du -s -m /lib/modules/5.12.0-rc6-4-amd64-clang12-lto/ > > 999 /lib/modules/5.12.0-rc6-4-amd64-clang12-lto/ > > > > Without: > > > > # du -s -m /lib/modules/5.12.0-rc6-3-amd64-clang12-lto/ > > 354 /lib/modules/5.12.0-rc6-3-amd64-clang12-lto/ > > > > Checking iwlwifi kernel-module: > > > > With: > > > > # find /lib/modules/5.12.0-rc6-4-amd64-clang12-lto/ -name > > 'iwlwifi.ko*' -type f -print | xargs ls -l > > -rw-r--r-- 1 root root 2381066 8. Apr 15:47 > > /lib/modules/5.12.0-rc6-4-amd64-clang12-lto/kernel/drivers/net/wireless/intel/iwlwifi/iwlwifi.ko.zst > > > > # find /lib/modules/5.12.0-rc6-4-amd64-clang12-lto/ -name > > 'iwlwifi.ko*' -type f -print | xargs du -k > > 2328 /lib/modules/5.12.0-rc6-4-amd64-clang12-lto/kernel/drivers/net/wireless/intel/iwlwifi/iwlwifi.ko.zst > > > > Without: > > > > # find /lib/modules/5.12.0-rc6-3-amd64-clang12-lto/ -name > > 'iwlwifi.ko*' -type f -print | xargs ls -l > > -rw-r--r-- 1 root root 675976 8. Apr 09:35 > > /lib/modules/5.12.0-rc6-3-amd64-clang12-lto/kernel/drivers/net/wireless/intel/iwlwifi/iwlwifi.ko > > > > # find /lib/modules/5.12.0-rc6-3-amd64-clang12-lto/ -name > > 'iwlwifi.ko*' -type f -print | xargs du -k > > 664 /lib/modules/5.12.0-rc6-3-amd64-clang12-lto/kernel/drivers/net/wireless/intel/iwlwifi/iwlwifi.ko > > > > My make invocation looks like this > > (start-build_5.12.0-rc6-4-amd64-clang12-lto.txt with this patch): > > > > dileks 74706 74681 0 15:46 pts/1 00:00:00 /usr/bin/perf_5.10 > > stat make V=1 -j4 LLVM=1 LLVM_IAS=1 PAHOLE=/opt/pahole/bin/pahole > > LOCALVERSION=-4-amd64-clang12-lto KBUILD_BUILD_HOST=iniza > > KBUILD_BUILD_USER=sedat.dilek@xxxxxxxxx > > KBUILD_BUILD_TIMESTAMP=2021-04-08 bindeb-pkg > > KDEB_PKGVERSION=5.12.0~rc6-4~bullseye+dileks1 > > > > Finally: > > > > I can *NOT* boot into the kernel with this patch applied. > > > > Personally, I do disable intentionally: > > > > CONFIG_DEBUG_INFO_COMPRESSED=n > > > > ...and will do independent of this patch: > > > > CONFIG_MODULE_COMPRESS_NONE=n > > > > As all Debian packages - generated by builddeb - are by default > > compressed with XZ. > > Compressing stuff before is counterproductive. > > This strategy generates in total smaller Debian package binaries. > > > > This is my first analysis, I had no deeper look. > > > > If you need further information, please let me know. > > > > Please take a look at this. > > > > Both linux-configs attached. > > > > Thanks. > > > > Additional information: > > $ LC_ALL=C ll drivers/net/wireless/intel/iwlwifi/iwlwifi.ko > -rw-r--r-- 1 dileks dileks 8.2M Apr 8 19:22 > drivers/net/wireless/intel/iwlwifi/iwlwifi.ko > > $ file drivers/net/wireless/intel/iwlwifi/iwlwifi.ko > drivers/net/wireless/intel/iwlwifi/iwlwifi.ko: ELF 64-bit LSB > relocatable, x86-64, version 1 (SYSV), > BuildID[sha1]=bfb188058d16a7cb7d579f68edcd1fff2a4d45d7, with > debug_info, not stripped > > $ LC_ALL=C ll debian/linux-image/lib/modules/5.12.0-rc6-4-amd64-clang12-lto/kernel/drivers/net/wireless/intel/iwlwifi/iwlwifi.ko.zst > -rw-r--r-- 1 dileks dileks 2.3M Apr 8 19:29 > debian/linux-image/lib/modules/5.12.0-rc6-4-amd64-clang12-lto/kernel/drivers/net/wireless/intel/iwlwifi/iwlwifi.ko.zst > > Looks like the kernel-module with debug_info gets ZTSD compressed. > Maybe drop `--rm` in scripts/Makefile.modinst: +quiet_cmd_zstd = ZSTD $@ + cmd_zstd = $(ZSTD) -T0 --rm -f -q $< $ zstd --help | grep '\-\-rm' --rm : remove source file(s) after successful de/compression ...untested. ( None of the other compressors do a removal. ) - Sedat -
