allocating 14KB memory per packet compression/decompression
results in vm_fault
kamal_ckk at yahoo.com
Thu Nov 3 22:56:31 PST 2005
> > for my compression/decompression i use string
> tables and temporary
> > buffers which take about 14KB of memory per
> If you're allocating 14 KB of data just to send
> (approximately) 1.4 KB
> and then you throw away the 14 KB immediately, it
> sounds terrible.
yes that's true.
since i am using the adaptive LZW
compression scheme it requires construction of string
table for compression/decompression. So an ip packet
of size 1500 bytes requires a table of size (4KB +
4KB + 2KB =12KB).
further still i copy the ip packet
data in another data buffer (about 1.4KB) and
then compress it.
So all this adds up to about 14KB.
Right now i can't do with less than 14KB.
as i said before the compression/decompression works
fine. but soon the kernel would panic with one
of the vm_fault: error message.
what would be the best possible way to
allocate/deallocate 14KB memory per packet without
causing vm_faults ??
is there anything i am missing ??
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