Hi all,
The RAID5 md driver pauses for 10-11 seconds, many times, while doing a
mke2fs. The pauses start after 300-400 groups have been written, then a
small amount of transfers happen between pauses until the process is
done. The spurts of transfers between pauses range between .01 seconds
to maybe 3 seconds. Under 'normal' use afterwards, everything seems
fine. The problem is memory resource sensitive. If there is more RAM,
the pauses start later while doing the mkfs. The problem possibly is a
race condition with the raid daemon and the code that re-starts it.
My environment is...
PowerPC G3 266MHZ, 64MB ram.
Symbios (LSI) 53c895 PCI SCSI chip
3, 4GB LVD drives (1 Quantum Viking II, 2 Seagate Barracudas)
Kernel 2.1.127 & related raid patches.
raid5 cluster size is 32k.
Since most folks are using x86 systems and I haven't heard of this
problem on the raid list, it seems to be specific to the powerpc.
Any thoughts?
