diff --git a/Documentation/admin-guide/sysctl/vm.rst b/Documentation/admin-guide/sysctl/vm.rst index 4ece86447a3e..003d5cc3751b 100644 --- a/Documentation/admin-guide/sysctl/vm.rst +++ b/Documentation/admin-guide/sysctl/vm.rst @@ -37,7 +37,6 @@ Currently, these files are in /proc/sys/vm: - dirty_writeback_centisecs - drop_caches - extfrag_threshold -- extra_free_kbytes - highmem_is_dirtyable - hugetlb_shm_group - laptop_mode @@ -300,21 +299,6 @@ only use the low memory and they can fill it up with dirty data without any throttling. -extra_free_kbytes - -This parameter tells the VM to keep extra free memory between the threshold -where background reclaim (kswapd) kicks in, and the threshold where direct -reclaim (by allocating processes) kicks in. - -This is useful for workloads that require low latency memory allocations -and have a bounded burstiness in memory allocations, for example a -realtime application that receives and transmits network traffic -(causing in-kernel memory allocations) with a maximum total message burst -size of 200MB may need 200MB of extra free memory to avoid direct reclaim -related latencies. - -============================================================== - hugetlb_shm_group =================