path: root/lib
diff options
authorTejun Heo <tj@kernel.org>2013-02-27 17:05:06 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-27 19:10:20 -0800
commit050a6b47d98e2bcea909c1129111e721668aaa2c (patch)
tree129480e1dd2b1e8d4129239ec508f7927f4d4b5a /lib
parent1d9b2e1e663719d406e3a770979a19ba4233bba0 (diff)
idr: make idr_layer larger
With recent preloading changes, idr no longer keeps full layer cache per each idr instance (used to be ~6.5k per idr on 64bit) and the previous patch removed restriction on the bitmap size. Both now allow us to have larger layers. Increase IDR_BITS to 8 regardless of BITS_PER_LONG. Each layer is slightly larger than 2k on 64bit and 1k on 32bit and carries 256 entries. The size isn't too large, especially compared to what we used to waste on per-idr caches, and 256 entries should be able to serve most use cases with single layer. The max tree depth is 4 which is much better than the previous 6 on 64bit and 7 on 32bit. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions

Privacy Policy