PR/41068 CVS commit: src/sys/fs/tmpfs

["Mindaugas Rasiukevicius" <rmind%netbsd.org@localhost>]

The following reply was made to PR kern/41068; it has been noted by GNATS.

From: "Mindaugas Rasiukevicius" <rmind%netbsd.org@localhost>
To: gnats-bugs%gnats.NetBSD.org@localhost
Cc: 
Subject: PR/41068 CVS commit: src/sys/fs/tmpfs
Date: Fri, 8 Nov 2013 15:44:23 +0000

 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.
 
 
 To generate a diff of this commit:
 cvs rdiff -u -r1.45 -r1.46 src/sys/fs/tmpfs/tmpfs.h
 cvs rdiff -u -r1.4 -r1.5 src/sys/fs/tmpfs/tmpfs_rename.c
 cvs rdiff -u -r1.82 -r1.83 src/sys/fs/tmpfs/tmpfs_subr.c
 cvs rdiff -u -r1.52 -r1.53 src/sys/fs/tmpfs/tmpfs_vfsops.c
 cvs rdiff -u -r1.105 -r1.106 src/sys/fs/tmpfs/tmpfs_vnops.c
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.