| Message ID | 1490597532-87971-1-git-send-email-thomas@reifferscheid.org |
|---|---|
| State | Changes Requested |
| Delegated to: | John Crispin |
| Headers | show |
diff --git a/target/linux/generic/patches-4.9/495-use-tmpfs-over-ramfs.patch b/target/linux/generic/patches-4.9/495-use-tmpfs-over-ramfs.patch new file mode 100644 index 0000000..6474ccd --- /dev/null +++ b/target/linux/generic/patches-4.9/495-use-tmpfs-over-ramfs.patch @@ -0,0 +1,11 @@ +--- kernel/init/do_mounts.c.orig 2017-03-22 17:15:52.587772894 +0100 ++++ kernel/init/do_mounts.c 2017-03-22 17:52:50.343828875 +0100 +@@ -659,7 +659,7 @@ + return err; + + if (IS_ENABLED(CONFIG_TMPFS) && !saved_root_name[0] && +- (!root_fs_names || strstr(root_fs_names, "tmpfs"))) { ++ (!root_fs_names || !strstr(root_fs_names, "ramfs"))) { + err = shmem_init(); + is_tmpfs = true; + } else {
The patch prefers tmpfs over ramfs adjusting the code to comply with the kernel docs. Details: ramfs and tmpfs: ---------------- One downside of ramfs is you can keep writing data into it until you fill up all memory, and the VM can't free it because the VM thinks that files should get written to backing store (rather than swap space), but ramfs hasn't got any backing store. Because of this, only root (or a trusted user) should be allowed write access to a ramfs mount. A ramfs derivative called tmpfs was created to add size limits, and the ability to write the data to swap space. Normal users can be allowed write access to tmpfs mounts. See Documentation/filesystems/tmpfs.txt for more information. rootfs: ---------------- 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. Fixes: The inability of diskfree of getting the size or usage information for rootfs when on initramfs kernels. Signed-off-by: Thomas Reifferscheid <thomas@reifferscheid.org> --- .../linux/generic/patches-4.9/495-use-tmpfs-over-ramfs.patch | 11 +++++++++++ 1 file changed, 11 insertions(+) create mode 100644 target/linux/generic/patches-4.9/495-use-tmpfs-over-ramfs.patch