tree a615e00bb0cdd9e852ecb163ca89f518ebbf3d6d
parent cf7bc62babb57ea27e7a00cd6271ca53579281fe
author Joel Stanley <joel@jms.id.au> 1623303345 +0930
committer Joel Stanley <joel@jms.id.au> 1623310045 +0000

meta-aspeed: Enable hardened allocator feature

SLAB_FREELIST_HARDENED can protect from freelist overwrite attacks with
really small overhead.

It works best with the SLUB allocator, so make SLUB the default by
removing SLAB=y.

      total   used           free           shared        buff/cache    available
SLAB  425596  44065.3+/-220  311099+/-3800  14864+/-3900  70432+/-3700  352767+/-3900

SLUB  425592  44225.3+/-280  313275+/-600   12132+/-3.3   68092+/-530   355295+/-280

These figures are the average memory usage from three boots of each
option in qemu, running the Romulus userspace. The output is from
free(1), reported in kilobytes.

Change-Id: I3c3ce67bc202dffbc3084382227f3dbc77f4cf85
Signed-off-by: Joel Stanley <joel@jms.id.au>