Re: CVS commit: src/sys/fs/tmpfs

["J. Hannken-Illjes" <hannken%eis.cs.tu-bs.de@localhost>]

On Nov 8, 2013, at 4:44 PM, Mindaugas Rasiukevicius 
<rmind%netbsd.org@localhost> wrote:

> Module Name:  src
> Committed By: rmind
> Date:         Fri Nov  8 15:44:23 UTC 2013
> 
> Modified Files:
>       src/sys/fs/tmpfs: tmpfs.h tmpfs_rename.c tmpfs_subr.c tmpfs_vfsops.c
>           tmpfs_vnops.c
> 
> Log Message:
> tmpfs: replace the broken tmpfs_dircookie() logic which uses the node
> address truncated to 31 bits (required for 32-bit readdir compatibility,
> e.g. linux32).  Instead, assign 2^31 range using the following logic:
> - The first half of the 2^31 is assigned incrementally (the fast path).
> - When exceeded, use the second half of 2^31, but manage with vmem(9).
> 
> It will require 2 billion files per-directory to trigger vmem(9) usage.
> Also, while here, add some fixes for tmpfs_unmount().
> 
> Should fix PR/47739, PR/47480, PR/46088 and PR/41068.
> Thanks to wiz@ for stress testing.

The tests fs/vfs/t_union/tmpfs_basic and fs/vfs/t_union/tmpfs_whiteout
start failing after this commit.

--
J. Hannken-Illjes - hannken%eis.cs.tu-bs.de@localhost - TU Braunschweig 
(Germany)