svn commit: r227310 - head/sys/fs/tmpfs

[Gennady Proskurin]

TMPFS is not usable without swap, it should have better algorithms to adjust
it's size, depending on amount of memory/swap available.

# swapoff -a
# swapinfo 
Device          1K-blocks     Used    Avail Capacity

# top
Mem: 253M Active, 282M Inact, 933M Wired, 3972K Cache, 135M Buf, 491M Free
Swap: 

# df -h /tmp
Filesystem    Size    Used   Avail Capacity  Mounted on
tmpfs         436k    436k      0B   100%    /tmp

no free space on /tmp

# uname -a
FreeBSD gpr.drweb.com 9.0-BETA2 FreeBSD 9.0-BETA2 #0 r225446M: Thu Sep  8 17:30:46 MSK 2011     gpr at gpr.drweb.com:/usr/obj/usr/src/freebsd-head/sys/DRW_A  amd64



On Mon, Nov 07, 2011 at 04:21:50PM +0000, Marcel Moolenaar wrote:
> Author: marcel
> Date: Mon Nov  7 16:21:50 2011
> New Revision: 227310
> URL: http://svn.freebsd.org/changeset/base/227310
> 
> Log:
>   Don astbestos garment and remove the warning about TMPFS being experimental
>   -- highly experimental even. So far the closest to a bug in TMPFS that people
>   have gotten to relates to how ZFS can take away from the memory that TMPFS
>   needs. One can argue that such is not a bug in TMPFS. Irrespective, even if
>   there is a bug here and there in TMPFS, it's not in our own advantage to
>   scare people away from using TMPFS. I for one have been using it, even with
>   ZFS, very successfully.
> 
> Modified:
>   head/sys/fs/tmpfs/tmpfs_vfsops.c
> 
> Modified: head/sys/fs/tmpfs/tmpfs_vfsops.c
> ==============================================================================
> --- head/sys/fs/tmpfs/tmpfs_vfsops.c	Mon Nov  7 15:43:11 2011	(r227309)
> +++ head/sys/fs/tmpfs/tmpfs_vfsops.c	Mon Nov  7 16:21:50 2011	(r227310)
> @@ -156,9 +156,6 @@ tmpfs_mount(struct mount *mp)
>  		return EOPNOTSUPP;
>  	}
>  
> -	printf("WARNING: TMPFS is considered to be a highly experimental "
> -	    "feature in FreeBSD.\n");
> -
>  	vn_lock(mp->mnt_vnodecovered, LK_SHARED | LK_RETRY);
>  	error = VOP_GETATTR(mp->mnt_vnodecovered, &va, mp->mnt_cred);
>  	VOP_UNLOCK(mp->mnt_vnodecovered, 0);
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