diff options
Diffstat (limited to 'Documentation/filesystems')
| -rw-r--r-- | Documentation/filesystems/proc.txt | 19 | ||||
| -rw-r--r-- | Documentation/filesystems/ramfs-rootfs-initramfs.txt | 4 |
2 files changed, 13 insertions, 10 deletions
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt index fcc22c982a2..823c95faebd 100644 --- a/Documentation/filesystems/proc.txt +++ b/Documentation/filesystems/proc.txt @@ -854,16 +854,15 @@ Committed_AS: The amount of memory presently allocated on the system. The committed memory is a sum of all of the memory which has been allocated by processes, even if it has not been "used" by them as of yet. A process which malloc()'s 1G - of memory, but only touches 300M of it will only show up - as using 300M of memory even if it has the address space - allocated for the entire 1G. This 1G is memory which has - been "committed" to by the VM and can be used at any time - by the allocating application. With strict overcommit - enabled on the system (mode 2 in 'vm.overcommit_memory'), - allocations which would exceed the CommitLimit (detailed - above) will not be permitted. This is useful if one needs - to guarantee that processes will not fail due to lack of - memory once that memory has been successfully allocated. + of memory, but only touches 300M of it will show up as + using 1G. This 1G is memory which has been "committed" to + by the VM and can be used at any time by the allocating + application. With strict overcommit enabled on the system + (mode 2 in 'vm.overcommit_memory'),allocations which would + exceed the CommitLimit (detailed above) will not be permitted. + This is useful if one needs to guarantee that processes will + not fail due to lack of memory once that memory has been + successfully allocated. VmallocTotal: total size of vmalloc memory area VmallocUsed: amount of vmalloc area which is used VmallocChunk: largest contiguous block of vmalloc area which is free diff --git a/Documentation/filesystems/ramfs-rootfs-initramfs.txt b/Documentation/filesystems/ramfs-rootfs-initramfs.txt index 59b4a0962e0..b176928e696 100644 --- a/Documentation/filesystems/ramfs-rootfs-initramfs.txt +++ b/Documentation/filesystems/ramfs-rootfs-initramfs.txt @@ -79,6 +79,10 @@ to just make sure certain lists can't become empty. Most systems just mount another filesystem over rootfs and ignore it. The amount of space an empty instance of ramfs takes up is tiny. +If CONFIG_TMPFS is enabled, rootfs will use tmpfs instead of ramfs by +default. To force ramfs, add "rootfstype=ramfs" to the kernel command +line. + What is initramfs? ------------------ |