[archiso] Change cowfile_size= behavior

Move from percent to explicit size and set a default of 256M (sparse)

Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@gmail.com>

1 files changed, 8 insertions, 9 deletions

diff --git a/docs/README.bootparams b/docs/README.bootparams
index 08198cb..c974755 100644
--- a/docs/README.bootparams
+++ b/docs/README.bootparams
@@ -31,27 +31,26 @@ INDEX
                     and continue booting if ok.
                     Default: (unset)
 * cow_label=        Set the filesystem label where COW (dm-snapshot)
-                    files must be stored.
+                    file must be stored.
                     Default: (unset)
-* cow_device=       Set the device node where COW (dm-snapshot) files
+* cow_device=       Set the device node where COW (dm-snapshot) file
                     must be stored.
                     Default: (unset) or "/dev/disk/by-label/${cow_label}"
 * cow_directory=    Set a directory inside ${cow_device}.
                     Default: "/persistent_${archisolabel}/${arch}"
-* cow_persistent=   Set if snapshots are persistent "P" or non-persistent "N".
+* cow_persistent=   Set if snapshot is persistent "P" or non-persistent "N".
                     Default: "N" (if no ${cow_device} is used) otherwise "P".
 * cowspace_size=    Set the size of tmpfs /cowspace. This space is used for
                     Copy-On-Write files of dm-snapshot.
                     Size is in bytes (suffix with "k", "m" and "g") or
                     in percentage of available RAM.
                     Default: "75%"
-* cowfile_size=     Set the size for all files to be used as COW (dm-snapshot),
-                    in percentage of the ro-device.fs file. This is mostly useful
-                    when cow_device= is used and filesystem does not support
-                    sparse files (ie VFAT).
-                    Default: "100%"
+* cowfile_size=     Set the size for COW file (dm-snapshot).
+                    The argument is an integer and optional unit.
+                    Units are M,G (powers of 1024) or MB,GB (powers of 1000).
+                    Default: "256M"
 * copytoram_size=   Set the size of tmpfs. This space is used for
-                    copy of all SquashFS images used, if copytoram=y.
+                    airootfs.sfs image if copytoram=y.
                     Size is in bytes (suffix with "k", "m" and "g") or
                     in percentage of available RAM.
                     Default: "75%"