diff options
Diffstat (limited to 'mymalloc.h')
| -rw-r--r-- | mymalloc.h | 13 |
1 files changed, 13 insertions, 0 deletions
@@ -6,6 +6,19 @@ * adds wait-free free(3) multi-threading support to avoid contention * with call_rcu. + * The wait-free free(3) implementation was proposed for inclusion into + glibc in 2018 and may eventually become part of glibc: + https://inbox.sourceware.org/libc-alpha/20180731084936.g4yw6wnvt677miti@dcvr/ + + * Arenas are thread-local and returned to a global pool upon thread + destruction. This works well for processes with stable thread counts, + but wastes memory in processes with unstable thread counts. + + * On Linux with O_TMPFILE support, all allocations are backed by + a temporary file (in TMPDIR). This avoids OOM errors on + memory-constrained systems due to the higher-than-normal memory + usage of mwrap itself. + * memalign-family support is ignored (and reimplemented in mwrap_core.h). dlmalloc's attempts to improve memory-efficiency is prone to fragmentation if memaligned-allocations are repeatedly freed and relalocated while |