Hi, On 2023-08-12 22:03, наб wrote: > Bitten by this again. Behaviour blames back to at least 2005 > (probably original to shmem.c), documented upstream in > Documentation/filesystems/tmpfs.rst (formerly .txt). > > For example: > # mount -t tmpfs -o size=0 tmpfs /etc/ > # df /etc/ > Filesystem 1k-blocks Used Avail Use% Mounted on > tmpfs 0 0 0 - /etc > # head -c100M < /dev/urandom > /etc/passwd > # df /etc/ > Filesystem 1k-blocks Used Avail Use% Mounted on > tmpfs 0 0 0 - /etc > # ls -l /etc/passwd > -rw-r--r-- 1 0 0 104857600 08-12 19:55 /etc/passwd > # du /etc/passwd > 204800 /etc/passwd > whereas the current manual insinuates head should ENOSPC instantly. > > Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@xxxxxxxxxxxxxxxxxx> Patch applied. Thanks, Alex > --- > man5/tmpfs.5 | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/man5/tmpfs.5 b/man5/tmpfs.5 > index cdd5f2fd8..5274e632d 100644 > --- a/man5/tmpfs.5 > +++ b/man5/tmpfs.5 > @@ -51,6 +51,8 @@ .SS Mount options > .BR size "=\fIbytes\fP" > Specify an upper limit on the size of the filesystem. > The size is given in bytes, and rounded up to entire pages. > +The limit is removed if the size is > +.BR 0 . > .IP > The size may have a > .BR k , > @@ -89,6 +91,8 @@ .SS Mount options > 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 smaller. > +The limit is removed if the number is > +.BR 0 . > .IP > Inodes may be specified with > .BR k , -- <http://www.alejandro-colomar.es/> GPG key fingerprint: A9348594CE31283A826FBDD8D57633D441E25BB5
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