Hello everybody!
As (at least in debian) gzip has the "--rsyncable" parameter included,
I'd like to suggest this patch to (configurable) use this for bzImage creation.
The default is "N" to stay compatible with current behaviour.
I didn't find an entry in MAINTAINERS; and according to git a lot of people
touch arch/i386/Kconfig, so I just send to the l-k.
Andrew, how about an -mm inclusion? Or is the patch too small to warrant that?
Regards,
Phil
From: [email protected]
diff -urN linux-2.6.12.orig/arch/i386/boot/compressed/Makefile linux-2.6.12/arch/i386/boot/compressed
/Makefile
--- linux-2.6.12.orig/arch/i386/boot/compressed/Makefile 2005-06-17 21:48:29.000000000 +0200
+++ linux-2.6.12/arch/i386/boot/compressed/Makefile 2005-11-16 13:44:34.000000000 +0100
@@ -4,6 +4,12 @@
# create a compressed vmlinux image from the original vmlinux
#
+ifdef CONFIG_RSYNCABLE
+GZIP_OPT := --rsyncable
+else
+GZIP_OPT :=
+endif
+
targets := vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o piggy.o
EXTRA_AFLAGS := -traditional
@@ -17,7 +23,7 @@
$(call if_changed,objcopy)
$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
- $(call if_changed,gzip)
+ $(call if_changed,gzip $(CONFIG_RSYNCABLE))
LDFLAGS_piggy.o := -r --format binary --oformat elf32-i386 -T
diff -urN linux-2.6.12.orig/arch/i386/Kconfig linux-2.6.12/arch/i386/Kconfig
--- linux-2.6.12.orig/arch/i386/Kconfig 2005-06-17 21:48:29.000000000 +0200
+++ linux-2.6.12/arch/i386/Kconfig 2005-11-16 13:27:12.000000000 +0100
@@ -922,6 +922,17 @@
generate incorrect output with certain kernel constructs when
-mregparm=3 is used.
+config RSYNCABLE
+ bool "Make bzImage better rsyncable (EXPERIMENTAL)"
+ depends on EXPERIMENTAL
+ default n
+ help
+ Compresses the kernel with "gzip --rsyncable". This makes the kernel
+ slightly larger (1-2%), but allows rsync to synchronize.
+
+
config SECCOMP
bool "Enable seccomp to safely compute untrusted bytecode"
depends on PROC_FS
-
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