Linux 5.4 changelog.
1. Memory management
- memory control group
Extend the shrink file to shrink all memcg caches for the slab cache. Before the commit, writing 1 to /sys/kernel/slab/<slab>/shrink was shrinking only the root cache. With SLUB_MEMCG_SYSFS_ON enabled and slub_memcg_sysfs=1 used, it was possible to shrink also memcg caches, but it was impractical. Now all memcg caches will be shrunk when writing to the "global" shrink file. commit
KASAN: for software tag-based mode, enhance the memory corruption report with a guess whether it is "use-after-free" or "out-of-bound" error instead of "invalid-access" error. commit
page_owner: when both page_owner and debug_pagealloc are enabled, store also the stack of who last freed the page and print it in dump_page() to improve debugging double free or use-after-free. commit commit commit
This changelog is not complete, meanwhile you can read about it here:
or, instead, you can take a look at the list of merge requests: