Re: 2.1.76, nfs client, and memory fragmentation

Krzysztof G. Baranowski (kgb@manjak.knm.org.pl)
Mon, 5 Jan 1998 22:02:57 +0100 (MET)

While testing the million monkey theory, Miguel de Icaza said:
>> You tweaked my curiosity, so I de-inlined copy_to/from_user and did
>> some comparisons. Bottom line is that on my machine it doesn't seem
>> to care either way.. performance stayed the same. I did Bonnie and
>> some network throughput tests in four configs. I'm only posting the
>> Bonnie runs in the interest of brevity.
>ext2 file system code uses memcpy_fromfs to copy blocks, not
>copy_to/from_user.
May I ask where ???

[root@manjak fs]# pwd
/usr/src/linux-2.1.77/fs
[root@manjak fs]# find . -type f -exec grep memcpy_[from,to] {} \;
-print
# define copy_from_user memcpy_fromfs
# define copy_to_user memcpy_tofs
./nfsd/nfsctl.c
memcpy_fromfs((char*)inp + (int)inp->cfs_ioctl.data,
memcpy_tofs(data->vi.out,
./coda/upcall.c

Cheers,
Kris

-- 
Krzysztof G. Baranowski - President of the Harmless Manyacs' Club
"The address you are trying to connect to is imaginary. Rotate 
the network card through 90 degrees and try again."
http://www.knm.org.pl/                 <prezes@manjak.knm.org.pl>