Re: [2.6 patch] i386: always use 4k stacks

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



> 
> So what about arches where single-page stacks aren't viable (for example 
> x86_64)?  Are we just screwed?


x86 is specially handicapped due to the fact that the stacks need to be
in the lowmem zone. Even if you have 8Gb ram, the lowmem zone is still
800Mb and a bit, and this gets to be under a high pressure, like
hyper-fragmentation. Same for bounce buffers etc etc.

note that the order thing is by far not the only advantage, pure memory
usage alone and cache locality also are wins. The memory usage halves
for kernel stacks after all (which means you can do more threads in
java, or use the memory for disk cache ;)

-
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]
  Powered by Linux