2.4.7 - strange reiserfs and software RAID5 behavior

[Basil A. Evseenko]

When raid5 daemon do resync array after unclean shutdown, mounting
_other_ reiserfs filesystems is too slow. (for example: 5 seconds without
running resync daemon,  2 minutes with it). This bug only arrives on 
uniprocessor machines - on SMP all work fine. I trace mount execution
it's sleep on __wait_on_buffer.

Gnu C                  egcs-2.91.66
Gnu make               3.78.1
binutils               2.9.5.0.22
util-linux             2.10f
mount                  2.10f
modutils               2.4.0
e2fsprogs              1.18
reiserfsprogs          3.x.0j
pcmcia-cs              3.1.8
Linux C Library        2.1.3
Dynamic linker (ldd)   2.1.3
Procps                 2.0.6
Net-tools              1.54
Console-tools          0.3.3
Sh-utils               2.0

processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 8
model name      : Pentium III (Coppermine)
stepping        : 3
cpu MHz         : 601.374
cache size      : 256 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 2
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse
bogomips        : 1199.30