linux/fs/nfs
Trond Myklebust e3db7691e9 [PATCH] NFS: Fix race in nfs_release_page()
NFS: Fix race in nfs_release_page()

    invalidate_inode_pages2() may find the dirty bit has been set on a page
    owing to the fact that the page may still be mapped after it was locked.
    Only after the call to unmap_mapping_range() are we sure that the page
    can no longer be dirtied.
    In order to fix this, NFS has hooked the releasepage() method and tries
    to write the page out between the call to unmap_mapping_range() and the
    call to remove_mapping(). This, however leads to deadlocks in the page
    reclaim code, where the page may be locked without holding a reference
    to the inode or dentry.

    Fix is to add a new address_space_operation, launder_page(), which will
    attempt to write out a dirty page without releasing the page lock.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

    Also, the bare SetPageDirty() can skew all sort of accounting leading to
    other nasties.

[akpm@osdl.org: cleanup]
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2007-01-11 18:18:21 -08:00
..
callback_proc.c [PATCH] fs/nfs/callback* passes error values big-endian 2006-10-20 10:26:40 -07:00
callback_xdr.c [PATCH] xdr annotations: fs/nfs/callback* 2006-10-20 10:26:40 -07:00
callback.c [PATCH] knfsd: Drop 'serv' option to svc_recv and svc_process 2006-10-02 07:57:18 -07:00
callback.h [PATCH] xdr annotations: fs/nfs/callback* 2006-10-20 10:26:40 -07:00
client.c WorkStruct: Pass the work_struct pointer instead of context data 2006-11-22 14:55:48 +00:00
delegation.c [PATCH] fs: Removing useless casts 2006-09-27 08:26:10 -07:00
delegation.h NFS: Rename struct nfs4_client to struct nfs_client 2006-09-22 23:24:31 -04:00
dir.c [PATCH] nfs: change uses of f_{dentry,vfsmnt} to use f_path 2006-12-08 08:28:41 -08:00
direct.c [PATCH] nfs: change uses of f_{dentry,vfsmnt} to use f_path 2006-12-08 08:28:41 -08:00
file.c [PATCH] NFS: Fix race in nfs_release_page() 2007-01-11 18:18:21 -08:00
getroot.c [PATCH] rename struct namespace to struct mnt_namespace 2006-12-08 08:28:51 -08:00
idmap.c [PATCH] nfs: change uses of f_{dentry,vfsmnt} to use f_path 2006-12-08 08:28:41 -08:00
inode.c [PATCH] nfs: change uses of f_{dentry,vfsmnt} to use f_path 2006-12-08 08:28:41 -08:00
internal.h NFS: Cleanup: add common helper nfs_page_length() 2006-12-06 10:46:36 -05:00
iostat.h NFSv4: Fix an oops in nfs4_fill_super 2006-03-20 13:44:48 -05:00
Makefile NFS: Share NFS superblocks per-protocol per-server per-FSID 2006-09-22 23:24:37 -04:00
mount_clnt.c [PATCH] xdr annotations: mount_clnt 2006-10-20 10:26:41 -07:00
namespace.c WorkStruct: Pass the work_struct pointer instead of context data 2006-11-22 14:55:48 +00:00
nfs2xdr.c [PATCH] xdr annotations: NFS readdir entries 2006-10-20 10:26:40 -07:00
nfs3acl.c NFSv3: Client-side nfsacl caching fix 2006-06-09 09:34:11 -04:00
nfs3proc.c [PATCH] nfs: change uses of f_{dentry,vfsmnt} to use f_path 2006-12-08 08:28:41 -08:00
nfs3xdr.c [PATCH] xdr annotations: NFS readdir entries 2006-10-20 10:26:40 -07:00
nfs4_fs.h WorkStruct: Pass the work_struct pointer instead of context data 2006-11-22 14:55:48 +00:00
nfs4namespace.c Remove all inclusions of <linux/config.h> 2006-10-04 03:38:54 -04:00
nfs4proc.c [PATCH] getting rid of all casts of k[cmz]alloc() calls 2006-12-13 09:05:58 -08:00
nfs4renewd.c WorkStruct: Pass the work_struct pointer instead of context data 2006-11-22 14:55:48 +00:00
nfs4state.c NFS: Share NFS superblocks per-protocol per-server per-FSID 2006-09-22 23:24:37 -04:00
nfs4xdr.c [PATCH] xdr annotations: NFS readdir entries 2006-10-20 10:26:40 -07:00
nfsroot.c [NET]: ipconfig and nfsroot annotations 2006-12-02 21:21:09 -08:00
pagelist.c Merge branch 'master' of /home/trondmy/kernel/linux-2.6/ into merge_linus 2006-12-07 16:35:17 -05:00
proc.c [PATCH] nfs: change uses of f_{dentry,vfsmnt} to use f_path 2006-12-08 08:28:41 -08:00
read.c Merge branch 'master' of /home/trondmy/kernel/linux-2.6/ into merge_linus 2006-12-07 16:35:17 -05:00
super.c [PATCH] NFSv4: Fix thinko in fs/nfs/super.c 2006-10-20 10:26:38 -07:00
symlink.c NFS: Remove use of the Big Kernel Lock around nfs calls to readlink 2006-12-06 10:46:31 -05:00
sysctl.c [PATCH] sysctl: implement CTL_UNNUMBERED 2006-11-06 01:46:23 -08:00
unlink.c NFS: kzalloc conversion in fs/nfs 2006-03-20 13:44:10 -05:00
write.c [PATCH] nfs: change uses of f_{dentry,vfsmnt} to use f_path 2006-12-08 08:28:41 -08:00