Commits on Apr 28, 2020

1. Add initial support for rsvd accounting hugetlb cgroup …

   The previous non-rsvd max/limit_in_bytes does not account for reserved
   huge page memory, making it possible for a processes to reserve all the
   huge page memory, without being able to allocate it (due to cgroup
   restrictions).
   
   In practice this makes it possible to successfully mmap more huge page
   memory than allowed via the cgroup settings, but when using the memory
   the process will get a SIGBUS and crash. This is bad for applications
   trying to mmap at startup (and it succeeds), but the program crashes
   when starting to use the memory. eg. postgres is doing this by default.
   
   This also keeps writing to the old max/limit_in_bytes, to make sure some
   applications read the wrong value.
   
   More info can be found here: https://lkml.org/lkml/2020/2/3/1153
   
   Signed-off-by: Odin Ugedal <odin@ugedal.com>

   

   odinuge committed Apr 28, 2020
   Configuration menu

   • View commit details
   • Copy full SHA for 5c84b1a
   • Browse repository at this point

   Copy the full SHA

   5c84b1a View commit details

   Browse the repository at this point in the history