Hi!
A small update.
Patching mm/filemap.c is not necessary in order to get the improved
performance!
It's sufficient to remove roundup_pow_of_two from |get_init_ra_size ...
So a simple one-liner changes to picture dramatically.
But why ?!?!?
roundup_pow_of_two() uses fls() and ia64 has buggy fls() implementation
[ seems that David fixed it but patch is not in the mainline yet]:
http://www.mail-archive.com/[email protected]/msg01196.html
That would also explain why you couldn't reproduce the problem on ia32
Xeon machines.
Bartlomiej
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
