Control: reopen -1 Control: retitle -1 vmlinux in linux-image packages is unstripped
On Thu, 2016-09-22 at 21:18 +0200, Helge Deller wrote: > Hi Ben, > > On 19.09.2016 20:56, Ben Hutchings wrote: > > > > On Mon, 2016-09-19 at 20:50 +0200, Helge Deller wrote: > > > > > > On 19.09.2016 19:41, Ben Hutchings wrote: > > > > > > > > On Mon, 2016-09-12 at 20:28 +0100, Ben Hutchings wrote: > > > > > > > > > > On Mon, 2016-09-12 at 18:17 +0200, Helge Deller wrote: > > > > > > > > > > > > > > > > > > So, can you please deactivate CONFIG_FTRACE completely for 32- and > > > > > > 64bit hppa configs? > > > > > > Is it sufficient to add "CONFIG_FTRACE=n" to > > > > > > debian/config/hppa/config ? > > > > > > > > > > Done. > > Argh - this didn't fixed the size issues on hppa. > I was under the wrong assumption, that CONFIG_FTRACE (which was implemented in > kernel 4.7 for the first time) was the culprit which increased the kernel > size. > This assumption was wrong. > > The attached patch finally fixes the issue. > It re-enables the CONFIG_FTRACE option (which is set by your upper config > files), > and disables CONFIG_DEBUG_INFO which was now suddenly enabled by the debian > kernel 4.7 (it wasn't in 4.6!). > I enabled CONFIG_DEBUG_RODATA to write-protect kernel memory as well. > > The main problem was, that the generated dwarf debug info increases the > kernel vmlinux image from 17MB to 97MB in disk size. > I've compile- and run-tested the patch and built a +b1 kernel. > > Can you apply the attached patch on top of current git? > I can commit it myself as well if you like. This is not the correct fix, nor is this an hppa-specific problem. We need to strip debug information out of the kernel image that goes into linux-image-<version>[-unsigned], and currently we don't do that explicitly. Previously we only enabled debug information for x86 and s390, and for those the upstream build rules already strip debug information before compressing the kernel. Here's the current status, so far as I can see: alpha: vmlinux.gz, stripped(?) and compressed arm64: Image, stripped and uncompressed armel,armhf: zImage, stripped and compressed hppa: vmlinux, UNstripped and uncompressed m68k: vmlinux.gz, stripped and compressed mips*: vmlinux, UNstripped and uncompressed powerpc*: vmlinux, UNstripped and uncompressed s390x: image, stripped and uncompressed sh4: zImage, stripped(?) and compressed sparc64: zImage, stripped and compressed x86: bzImage, stripped and compressed (No binary packages of 4.7 are available on ftp.debian-ports.org for alpha or sh4 yet, so those results are based on reading the respective Makefiles.) It seems that we only need a special case in debian/rules.real for those architectures where we install vmlinux directly. Ben. -- Ben Hutchings The first rule of tautology club is the first rule of tautology club.
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