[parisc-linux] Re: hppa64-...-gcc-4.1 annoying pb?

[Joel Soete]

> > mmm, this seems to be a key;
> > this morming (to me), I rebuild 2.6.17-rc3-pa3 + your patch the 64bit
kernel on:
> >     1/ the n4k + ulimit -v 524288 -> compile time nornal 
> > 
appologies my mistake: it wasn't the same config (i erronioulsy build a smp
kernel):
## to build 64bit up kernel

# sh  ../TstPgAlloc
+ rm mm/page_alloc.o mm/.page_alloc.o.d
rm: cannot remove `mm/.page_alloc.o.d': No such file or directory
+ hppa64-linux-gnu-gcc-4.1 --save-temps -Wp,-MD,mm/.page_alloc.o.d -nostdinc
-isystem /usr/lib/gcc/hppa64-linux-gnu/4.1.1/include -D__KERNEL__ -Iinclude
-Iinclude2 -I/usr/src/linux-2.6.17-rc3-pa3/include -include
include/linux/autoconf.h -I/usr/src/linux-2.6.17-rc3-pa3/mm -Imm -Wall -Wundef
-Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -O2
-fomit-frame-pointer -pipe -mno-space-regs -mfast-indirect-calls
-mdisable-fpregs -ffunction-sections -march=2.0 -mschedule=8000
-Wdeclaration-after-statement -Wno-pointer-sign '-DKBUILD_STR(s)=#s'
'-DKBUILD_BASENAME=KBUILD_STR(page_alloc)'
'-DKBUILD_MODNAME=KBUILD_STR(page_alloc)' -c -o mm/page_alloc.o
/usr/src/linux-2.6.17-rc3-pa3/mm/page_alloc.c
hppa64-linux-gnu-gcc-4.1: warning: -pipe ignored because -save-temps specified

real    64m56.040s
user    63m33.975s
sys     0m0.811s

# ulimit -v 524288
root at patst006:/usr/src/linux-2.6-pa-n4kup-t# sh  ../TstPgAlloc
+ rm mm/page_alloc.o mm/.page_alloc.o.d
+ hppa64-linux-gnu-gcc-4.1 --save-temps -Wp,-MD,mm/.page_alloc.o.d -nostdinc
-isystem /usr/lib/gcc/hppa64-linux-gnu/4.1.1/include -D__KERNEL__ -Iinclude
-Iinclude2 -I/usr/src/linux-2.6.17-rc3-pa3/include -include
include/linux/autoconf.h -I/usr/src/linux-2.6.17-rc3-pa3/mm -Imm -Wall -Wundef
-Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -O2
-fomit-frame-pointer -pipe -mno-space-regs -mfast-indirect-calls
-mdisable-fpregs -ffunction-sections -march=2.0 -mschedule=8000
-Wdeclaration-after-statement -Wno-pointer-sign '-DKBUILD_STR(s)=#s'
'-DKBUILD_BASENAME=KBUILD_STR(page_alloc)'
'-DKBUILD_MODNAME=KBUILD_STR(page_alloc)' -c -o mm/page_alloc.o
/usr/src/linux-2.6.17-rc3-pa3/mm/page_alloc.c
hppa64-linux-gnu-gcc-4.1: warning: -pipe ignored because -save-temps specified

real    64m52.295s
user    63m31.826s
sys     0m0.669s

## to build 64bit smp kernel

# ulimit -v unlimited
# sh  ../TstPgAlloc
+ rm mm/page_alloc.o mm/.page_alloc.o.d
+ hppa64-linux-gnu-gcc-4.1 --save-temps -Wp,-MD,mm/.page_alloc.o.d -nostdinc
-isystem /usr/lib/gcc/hppa64-linux-gnu/4.1.1/include -D__KERNEL__ -Iinclude
-Iinclude2 -I/usr/src/linux-2.6.17-rc3-pa3/include -include
include/linux/autoconf.h -I/usr/src/linux-2.6.17-rc3-pa3/mm -Imm -Wall -Wundef
-Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -O2
-fomit-frame-pointer -pipe -mno-space-regs -mfast-indirect-calls
-mdisable-fpregs -ffunction-sections -march=2.0 -mschedule=8000
-Wdeclaration-after-statement -Wno-pointer-sign '-DKBUILD_STR(s)=#s'
'-DKBUILD_BASENAME=KBUILD_STR(page_alloc)'
'-DKBUILD_MODNAME=KBUILD_STR(page_alloc)' -c -o mm/page_alloc.o
/usr/src/linux-2.6.17-rc3-pa3/mm/page_alloc.c
hppa64-linux-gnu-gcc-4.1: warning: -pipe ignored because -save-temps specified

real    0m9.340s
user    0m8.944s
sys     0m0.308s

# ulimit -v 524288
root at patst006:/usr/src/linux-2.6-pa-n4kmp-t# sh  ../TstPgAlloc
+ rm mm/page_alloc.o mm/.page_alloc.o.d
+ hppa64-linux-gnu-gcc-4.1 --save-temps -Wp,-MD,mm/.page_alloc.o.d -nostdinc
-isystem /usr/lib/gcc/hppa64-linux-gnu/4.1.1/include -D__KERNEL__ -Iinclude
-Iinclude2 -I/usr/src/linux-2.6.17-rc3-pa3/include -include
include/linux/autoconf.h -I/usr/src/linux-2.6.17-rc3-pa3/mm -Imm -Wall -Wundef
-Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -O2
-fomit-frame-pointer -pipe -mno-space-regs -mfast-indirect-calls
-mdisable-fpregs -ffunction-sections -march=2.0 -mschedule=8000
-Wdeclaration-after-statement -Wno-pointer-sign '-DKBUILD_STR(s)=#s'
'-DKBUILD_BASENAME=KBUILD_STR(page_alloc)'
'-DKBUILD_MODNAME=KBUILD_STR(page_alloc)' -c -o mm/page_alloc.o
/usr/src/linux-2.6.17-rc3-pa3/mm/page_alloc.c
hppa64-linux-gnu-gcc-4.1: warning: -pipe ignored because -save-temps specified

real    0m9.261s
user    0m8.942s
sys     0m0.315s


 
> >     2/ the b2k (default ulimit -v being ulimited) ->  page_alloc.c
compilation 
> >        very long (even thought this only have 256Mb?)
> > 
> > > This is on a machine with 1 GB.  I had found that the VM system
> > > could thrash and the system crash when it tried to allocate about
> > > 1 GB.
> 
> I think this is a UP problem.  When too much VM gets allocated
> to one process, it blocks some userspace kernel support.  The
> following assembler file was where I first noticed the problem:
> 
> 	.data
> foo:
> 	.block -1
> 
Ak ok, will check.

Sorry for confusion,
    Joel

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