(at least smp) fc5 kernels after 1788 have excessive kerneloverhead

Andy Burns fedora-test at adslpipe.co.uk
Sat Dec 31 12:01:24 UTC 2005

Dave Jones wrote:

> It's deliberate, as its profiling kernel allocations. (see /proc/kmalloc)

Will this hit a system with EXT3->LVM->MDRAID1 particularly hard? Took 
about two hours to do a local install (with a largish set of packages 
but not everything) which I seem to remember took about 3/4 of an hour 

During installation ext3_xattr_block_set and r1bio_pool_alloc show as 
the top guzzlers, totalling 1.5 billion allocations between them, 
obviously plenty of disk writing going on ...

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