linux

Files

Zhang, Yanmin b6174df5ee [PATCH] mmap zero-length hugetlb file with PROT_NONE to protect a hugetlb virtual area

Sometimes, applications need below call to be successful although
"/mnt/hugepages/file1" doesn't exist.

fd = open("/mnt/hugepages/file1", O_CREAT|O_RDWR, 0755);
*addr = mmap(NULL, 0x1024*1024*256, PROT_NONE, 0, fd, 0);

As for regular pages (or files), above call does work, but as for huge
pages, above call would fail because hugetlbfs_file_mmap would fail if
(!(vma->vm_flags & VM_WRITE) && len > inode->i_size).

This capability on huge page is useful on ia64 when the process wants to
protect one area on region 4, so other threads couldn't read/write this
area.  A famous JVM (Java Virtual Machine) implementation on IA64 needs the
capability.

Signed-off-by: Zhang Yanmin <yanmin.zhang@intel.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Hugh Dickins <hugh@veritas.com>
[ Expand-on-mmap semantics again... this time matching normal fs's. wli ]
Acked-by: William Lee Irwin III <wli@holomorphy.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2006-07-10 13:24:21 -07:00

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

adfs

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

affs

[PATCH] mark address_space_operations const

2006-06-28 14:59:04 -07:00

afs

[PATCH] mark address_space_operations const

2006-06-28 14:59:04 -07:00

autofs

[PATCH] VFS: Permit filesystem to override root dentry on mount

2006-06-23 07:42:45 -07:00

autofs4

[PATCH] fs: use list_move()

2006-06-26 09:58:18 -07:00

befs

typo fixes: aquire -> acquire

2006-06-30 18:23:04 +02:00

bfs

[PATCH] mark address_space_operations const

2006-06-28 14:59:04 -07:00

cifs

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

coda

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

configfs

configfs: Clear up a few extra spaces where there should be TABs.

2006-06-29 14:43:01 -07:00

cramfs

[PATCH] mark address_space_operations const

2006-06-28 14:59:04 -07:00

debugfs

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

devpts

[PATCH] VFS: Permit filesystem to override root dentry on mount

2006-06-23 07:42:45 -07:00

efs

[PATCH] mark address_space_operations const

2006-06-28 14:59:04 -07:00

exportfs

[PATCH] NFS server subtree_check returns dubious value

2006-05-21 12:59:16 -07:00

ext2

[PATCH] lockdep: annotate the quota code

2006-07-03 15:27:08 -07:00

ext3

[PATCH] lockdep: annotate the quota code

2006-07-03 15:27:08 -07:00

fat

[PATCH] mark address_space_operations const

2006-06-28 14:59:04 -07:00

freevxfs

[PATCH] mark address_space_operations const

2006-06-28 14:59:04 -07:00

fuse

[PATCH] mark address_space_operations const

2006-06-28 14:59:04 -07:00

hfs

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

hfsplus

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

hostfs

[PATCH] mark address_space_operations const

2006-06-28 14:59:04 -07:00

hpfs

[PATCH] mark address_space_operations const

2006-06-28 14:59:04 -07:00

hppfs

[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry

2006-06-23 07:42:45 -07:00

hugetlbfs

[PATCH] mmap zero-length hugetlb file with PROT_NONE to protect a hugetlb virtual area

2006-07-10 13:24:21 -07:00

isofs

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

jbd

[PATCH] add poison.h and patch primary users

2006-06-27 17:32:38 -07:00

jffs

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

jffs2

Merge git://git.infradead.org/mtd-2.6

2006-07-03 21:29:08 -07:00

jfs

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

lockd

NLM,NFSv4: Wait on local locks before we put RPC calls on the wire

2006-07-05 13:13:18 -04:00

minix

[PATCH] mark address_space_operations const

2006-06-28 14:59:04 -07:00

msdos

[PATCH] VFS: Permit filesystem to override root dentry on mount

2006-06-23 07:42:45 -07:00

ncpfs

Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial

2006-06-30 15:39:30 -07:00

nfs

Merge branch 'locks'

2006-07-05 13:19:25 -04:00

nfs_common

…

nfsd

Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial

2006-06-30 15:39:30 -07:00

nls

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

ntfs

[PATCH] lockdep: annotate NTFS locking rules

2006-07-03 15:27:08 -07:00

ocfs2

ocfs2: remove redundant NULL checks in ocfs2_direct_IO_get_blocks()

2006-06-29 16:13:35 -07:00

openpromfs

[OPENPROMFS]: Rewrite using in-kernel device tree and seq_file.

2006-06-25 23:19:14 -07:00

partitions

[PATCH] partitions: let partitions inherit policy from disk

2006-07-10 13:24:14 -07:00

proc

[PATCH] uclinux: fix proc_task()/get_proc-task() naming

2006-07-03 22:37:13 -07:00

qnx4

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

ramfs

[PATCH] mark address_space_operations const

2006-06-28 14:59:04 -07:00

reiserfs

[PATCH] reiserfs: fix journaling issue regarding fsync()

2006-07-10 13:24:13 -07:00

romfs

[PATCH] mark address_space_operations const

2006-06-28 14:59:04 -07:00

smbfs

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

sysfs

[PATCH] mark address_space_operations const

2006-06-28 14:59:04 -07:00

sysv

[PATCH] mark address_space_operations const

2006-06-28 14:59:04 -07:00

udf

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

ufs

[PATCH] lockdep: annotate the quota code

2006-07-03 15:27:08 -07:00

vfat

[PATCH] VFS: Permit filesystem to override root dentry on mount

2006-06-23 07:42:45 -07:00

xfs

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

aio.c

spelling fixes

2006-06-26 18:35:02 +02:00

attr.c

…

bad_inode.c

[PATCH] Make most file operations structs in fs/ const

2006-03-28 09:16:06 -08:00

binfmt_aout.c

…

binfmt_elf_fdpic.c

[PATCH] frv: binfmt_elf_fdpic __user annotations

2006-06-23 07:42:54 -07:00

binfmt_elf.c

[PATCH] binfmt_elf: fix checks for bad address

2006-07-03 15:26:59 -07:00

binfmt_em86.c

…

binfmt_flat.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

binfmt_misc.c

Merge branch 'master' of /home/trondmy/kernel/linux-2.6/

2006-06-24 13:07:53 -04:00

binfmt_script.c

…

binfmt_som.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

bio.c

[PATCH] Fix missing ret assignment in __bio_map_user() error path

2006-06-17 10:52:12 -07:00

block_dev.c

[PATCH] lockdep: annotate blkdev nesting

2006-07-03 15:27:10 -07:00

buffer.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial

2006-06-30 15:39:30 -07:00

char_dev.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

compat_ioctl.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

compat.c

[PATCH] x86_64: Add compat_printk and sysctl to turn off compat layer warnings

2006-06-26 10:48:16 -07:00

dcache.c

[PATCH] lockdep: annotate dcache

2006-07-03 15:27:06 -07:00

dcookies.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

direct-io.c

[PATCH] lockdep: annotate direct io

2006-07-03 15:27:06 -07:00

dnotify.c

[PATCH] Use __read_mostly on some hot fs variables

2006-03-26 08:56:56 -08:00

dquot.c

[PATCH] use list_add_tail() instead of list_add()

2006-06-26 09:58:17 -07:00

drop_caches.c

…

eventpoll.c

[PATCH] sched: cleanup, remove task_t, convert to struct task_struct

2006-07-03 15:27:11 -07:00

exec.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

fcntl.c

BUG_ON() Conversion in fs/fcntl.c

2006-04-02 13:37:19 +02:00

fifo.c

[PATCH] pipe.c/fifo.c code cleanups

2006-04-11 13:53:33 +02:00

file_table.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

file.c

[PATCH] for_each_possible_cpu: fixes for generic part

2006-03-28 09:16:05 -08:00

filesystems.c

…

fs-writeback.c

[PATCH] zoned vm counters: conversion of nr_unstable to per zone counter

2006-06-30 11:25:36 -07:00

inode.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial

2006-06-30 15:39:30 -07:00

inotify_user.c

[PATCH] VFS: Permit filesystem to override root dentry on mount

2006-06-23 07:42:45 -07:00

inotify.c

[PATCH] inotify (4/5): allow watch removal from event handler

2006-06-20 05:25:19 -04:00

ioctl.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

ioprio.c

[PATCH] SELinux: Add security hook definition for getioprio and insert hooks

2006-06-30 11:25:37 -07:00

Kconfig

ocfs2: OCFS2_FS must depend on SYSFS

2006-06-29 14:56:12 -07:00

Kconfig.binfmt

…

libfs.c

[PATCH] core: use list_move()

2006-06-26 09:58:17 -07:00

locks.c

VFS: Add support for the FL_ACCESS flag to flock_lock_file()

2006-07-05 13:13:18 -04:00

Makefile

[PATCH] devfs: Remove devfs from the kernel tree

2006-06-26 12:25:05 -07:00

mbcache.c

[PATCH] Typo fixes

2006-03-28 09:16:08 -08:00

mpage.c

[PATCH] writeback: fix range handling

2006-06-23 07:42:49 -07:00

namei.c

[PATCH] lockdep: annotate i_mutex

2006-07-03 15:27:06 -07:00

namespace.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

nfsctl.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

open.c

[PATCH] ftruncate does not always update m/ctime

2006-06-25 10:01:15 -07:00

pipe.c

[PATCH] VFS: Permit filesystem to override root dentry on mount

2006-06-23 07:42:45 -07:00

pnode.c

[PATCH] core: use list_move()

2006-06-26 09:58:17 -07:00

pnode.h

…

posix_acl.c

…

quota_v1.c

…

quota_v2.c

[PATCH] sem2mutex: quota

2006-03-23 07:38:11 -08:00

quota.c

[PATCH] sem2mutex: quota

2006-03-23 07:38:11 -08:00

read_write.c

[PATCH] fs/read_write.c: EXPORT_UNUSED_SYMBOL

2006-07-10 13:24:18 -07:00

readdir.c

…

select.c

[PATCH] fs: sys_poll with timeout -1 bug fix

2006-06-25 10:01:22 -07:00

seq_file.c

[PATCH] sem2mutex: fs/seq_file.c

2006-03-23 07:38:12 -08:00

splice.c

[PATCH] splice: retrieve mapping after locking the page

2006-06-23 17:10:39 +02:00

stat.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

super.c

[PATCH] lockdep: annotate sb ->s_umount

2006-07-03 15:27:09 -07:00

sync.c

[PATCH] writeback: fix range handling

2006-06-23 07:42:49 -07:00

xattr_acl.c

…

xattr.c

[PATCH] log more info for directory entry change events

2006-06-20 05:25:28 -04:00