From b9f2b3de43c820a4259ec8855359a2d8d18abe01 Mon Sep 17 00:00:00 2001 From: Karel Zak Date: Mon, 6 Oct 2008 12:56:37 +0200 Subject: [PATCH] mount: sync tmpfs info in mount.8 with Documentation/filesystems/tmpfs.txt Addresses-Red-Hat-Bugzilla: #465761 Signed-off-by: Karel Zak --- mount/mount.8 | 71 ++++++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 62 insertions(+), 9 deletions(-) diff --git a/mount/mount.8 b/mount/mount.8 index a9d96279..3b847225 100644 --- a/mount/mount.8 +++ b/mount/mount.8 @@ -1671,26 +1671,79 @@ and the current version of None. .SH "Mount options for tmpfs" -The following parameters accept a suffix -.BR k , -.B m -or -.B g -for Ki, Mi, Gi (binary kilo, mega and giga) and can be changed on remount. .TP .BI size= nbytes Override default maximum size of the filesystem. The size is given in bytes, and rounded down to entire pages. -The default is half of the memory. +The default is half of the memory. The size parameter also accepts a suffix % +to limit this tmpfs instance to that percentage of your physical RAM: +the default, when neither size nor nr_blocks is specified, is size=50% .TP .B nr_blocks= -Set number of blocks. +The same as size, but in blocks of PAGE_CACHE_SIZE .TP .B nr_inodes= -Set number of inodes. +The maximum number of inodes for this instance. The default +is half of the number of your physical RAM pages, or (on a +machine with highmem) the number of lowmem RAM pages, +whichever is the lower. +.PP +The tmpfs mount options for sizing ( +.BR size , +.BR nr_blocks , +and +.BR nr_inodes ) +accept a suffix +.BR k , +.B m +or +.B g +for Ki, Mi, Gi (binary kilo, mega and giga) and can be changed on remount. + .TP .B mode= Set initial permissions of the root directory. +.TP +.B uid= +The user id. +.TP +.B gid= +The group id. +.TP +.B mpol=[default|prefer:Node|bind:NodeList|interleave|interleave:NodeList] +Set the NUMA memory allocation policy for all files in that +instance (if the kernel CONFIG_NUMA is enabled) - which can be adjusted on the +fly via 'mount -o remount ...' +.RS +.TP +.B default +prefers to allocate memory from the local node +.TP +.B prefer:Node +prefers to allocate memory from the given Node +.TP +.B bind:NodeList +allocates memory only from nodes in NodeList +.TP +.B interleave +prefers to allocate from each node in turn +.TP +.B interleave:NodeList +allocates from each node of NodeList in turn. +.PP +The NodeList format is a comma-separated list of decimal numbers and ranges, a +range being two hyphen-separated decimal numbers, the smallest and largest node +numbers in the range. For example, mpol=bind:0-3,5,7,9-15 + +Note that trying to mount a tmpfs with an mpol option will fail if the +running kernel does not support NUMA; and will fail if its nodelist +specifies a node which is not online. If your system relies on that +tmpfs being mounted, but from time to time runs a kernel built without +NUMA capability (perhaps a safe recovery kernel), or with fewer nodes +online, then it is advisable to omit the mpol option from automatic +mount options. It can be added later, when the tmpfs is already mounted +on MountPoint, by 'mount -o remount,mpol=Policy:NodeList MountPoint'. +.PE .SH "Mount options for udf" udf is the "Universal Disk Format" filesystem defined by the Optical -- 2.39.5