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bump to 3.6.3, added module initialisation patches, readded memgroups

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This commit is contained in:
Tobias Powalowski 2012-10-22 12:12:03 +00:00
parent 813cdaf105
commit 6f1e66def0
6 changed files with 170 additions and 12 deletions
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21
PKGBUILD
View File

@ -5,7 +5,7 @@
pkgbase=linux # Build stock -ARCH kernel
#pkgbase=linux-custom # Build kernel with a different name
_srcname=linux-3.6
pkgver=3.6.2
pkgver=3.6.3
pkgrel=1
arch=('i686' 'x86_64')
url="http://www.kernel.org/"
@ -18,13 +18,17 @@ source=("http://www.kernel.org/pub/linux/kernel/v3.x/${_srcname}.tar.xz"
'config' 'config.x86_64'
# standard config files for mkinitcpio ramdisk
'linux.preset'
'change-default-console-loglevel.patch')
'change-default-console-loglevel.patch'
'module-symbol-waiting-3.6.patch'
'module-init-wait-3.6.patch')
md5sums=('1a1760420eac802c541a20ab51a093d1'
'ad1020c82a71ee1ef2416a0d12e724df'
'443f285744cb96401f9a631f542b9248'
'2793e97a9e98c501afd3e18d2e3b9762'
'96701113d37ef4f9b785206ab8bcc71e'
'65f7ff39775f20f65014383564d3cb65'
'3adbfa45451c4bcf9dd7879bed033d77'
'eb14dcfd80c00852ef81ded6e826826a'
'9d3c56a4b999c8bfbd4018089a62f662')
'9d3c56a4b999c8bfbd4018089a62f662'
'670931649c60fcb3ef2e0119ed532bd4'
'8a71abc4224f575008f974a099b5cf6f')
_kernelname=${pkgbase#linux}
@ -42,6 +46,11 @@ build() {
# (relevant patch sent upstream: https://lkml.org/lkml/2011/7/26/227)
patch -Np1 -i "${srcdir}/change-default-console-loglevel.patch"
# fix module initialisation
# https://bugs.archlinux.org/task/32122
patch -Np1 -i "${srcdir}/module-symbol-waiting-3.6.patch"
patch -Np1 -i "${srcdir}/module-init-wait-3.6.patch"
if [ "${CARCH}" = "x86_64" ]; then
cat "${srcdir}/config.x86_64" > ./.config
else

7
config
View File

@ -1,6 +1,6 @@
#
# Automatically generated file; DO NOT EDIT.
# Linux/i386 3.6.0 Kernel Configuration
# Linux/i386 3.6.3 Kernel Configuration
#
# CONFIG_64BIT is not set
CONFIG_X86_32=y
@ -134,7 +134,10 @@ CONFIG_CPUSETS=y
CONFIG_PROC_PID_CPUSET=y
CONFIG_CGROUP_CPUACCT=y
CONFIG_RESOURCE_COUNTERS=y
# CONFIG_MEMCG is not set
CONFIG_MEMCG=y
CONFIG_MEMCG_SWAP=y
# CONFIG_MEMCG_SWAP_ENABLED is not set
CONFIG_MEMCG_KMEM=y
# CONFIG_CGROUP_HUGETLB is not set
# CONFIG_CGROUP_PERF is not set
CONFIG_CGROUP_SCHED=y

7
config.x86_64
View File

@ -1,6 +1,6 @@
#
# Automatically generated file; DO NOT EDIT.
# Linux/x86_64 3.6.0 Kernel Configuration
# Linux/x86_64 3.6.3 Kernel Configuration
#
CONFIG_64BIT=y
# CONFIG_X86_32 is not set
@ -136,7 +136,10 @@ CONFIG_CPUSETS=y
CONFIG_PROC_PID_CPUSET=y
CONFIG_CGROUP_CPUACCT=y
CONFIG_RESOURCE_COUNTERS=y
# CONFIG_MEMCG is not set
CONFIG_MEMCG=y
CONFIG_MEMCG_SWAP=y
# CONFIG_MEMCG_SWAP_ENABLED is not set
CONFIG_MEMCG_KMEM=y
# CONFIG_CGROUP_HUGETLB is not set
# CONFIG_CGROUP_PERF is not set
CONFIG_CGROUP_SCHED=y

2
linux.install
View File

@ -2,7 +2,7 @@
# arg 2: the old package version
KERNEL_NAME=
KERNEL_VERSION=3.6.2-1-ARCH
KERNEL_VERSION=3.6.3-1-ARCH
# set a sane PATH to ensure that critical utils like depmod will be found
export PATH='/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'

77
module-init-wait-3.6.patch Normal file
View File

@ -0,0 +1,77 @@
From: Rusty Russell <rusty@rustcorp.com.au>
Date: Fri, 28 Sep 2012 05:01:03 +0000 (+0930)
Subject: module: wait when loading a module which is currently initializing.
X-Git-Tag: v3.7-rc1~2^2~32
X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Ftorvalds%2Flinux-2.6.git;a=commitdiff_plain;h=9bb9c3be568346538
module: wait when loading a module which is currently initializing.
The original module-init-tools module loader used a fnctl lock on the
.ko file to avoid attempts to simultaneously load a module.
Unfortunately, you can't get an exclusive fcntl lock on a read-only
fd, making this not work for read-only mounted filesystems.
module-init-tools has a hacky sleep-and-loop for this now.
It's not that hard to wait in the kernel, and only return -EEXIST once
the first module has finished loading (or continue loading the module
if the first one failed to initialize for some reason). It's also
consistent with what we do for dependent modules which are still loading.
Suggested-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---
diff --git a/kernel/module.c b/kernel/module.c
index 63cf6e7..74bc195 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2845,6 +2845,20 @@ static int post_relocation(struct module *mod, const struct load_info *info)
return module_finalize(info->hdr, info->sechdrs, mod);
}
+/* Is this module of this name done loading? No locks held. */
+static bool finished_loading(const char *name)
+{
+ struct module *mod;
+ bool ret;
+
+ mutex_lock(&module_mutex);
+ mod = find_module(name);
+ ret = !mod || mod->state != MODULE_STATE_COMING;
+ mutex_unlock(&module_mutex);
+
+ return ret;
+}
+
/* Allocate and load the module: note that size of section 0 is always
zero, and we rely on this for optional sections. */
static struct module *load_module(void __user *umod,
@@ -2852,7 +2866,7 @@ static struct module *load_module(void __user *umod,
const char __user *uargs)
{
struct load_info info = { NULL, };
- struct module *mod;
+ struct module *mod, *old;
long err;
pr_debug("load_module: umod=%p, len=%lu, uargs=%p\n",
@@ -2918,8 +2932,18 @@ static struct module *load_module(void __user *umod,
* function to insert in a way safe to concurrent readers.
* The mutex protects against concurrent writers.
*/
+again:
mutex_lock(&module_mutex);
- if (find_module(mod->name)) {
+ if ((old = find_module(mod->name)) != NULL) {
+ if (old->state == MODULE_STATE_COMING) {
+ /* Wait in case it fails to load. */
+ mutex_unlock(&module_mutex);
+ err = wait_event_interruptible(module_wq,
+ finished_loading(mod->name));
+ if (err)
+ goto free_arch_cleanup;
+ goto again;
+ }
err = -EEXIST;
goto unlock;
}

66
module-symbol-waiting-3.6.patch Normal file
View File

@ -0,0 +1,66 @@
From: Rusty Russell <rusty@rustcorp.com.au>
Date: Fri, 28 Sep 2012 05:01:03 +0000 (+0930)
Subject: module: fix symbol waiting when module fails before init
X-Git-Tag: v3.7-rc1~2^2~33
X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Ftorvalds%2Flinux-2.6.git;a=commitdiff_plain;h=6f13909f4fe9652f1
module: fix symbol waiting when module fails before init
We use resolve_symbol_wait(), which blocks if the module containing
the symbol is still loading. However:
1) The module_wq we use is only woken after calling the modules' init
function, but there are other failure paths after the module is
placed in the linked list where we need to do the same thing.
2) wake_up() only wakes one waiter, and our waitqueue is shared by all
modules, so we need to wake them all.
3) wake_up_all() doesn't imply a memory barrier: I feel happier calling
it after we've grabbed and dropped the module_mutex, not just after
the state assignment.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---
diff --git a/kernel/module.c b/kernel/module.c
index 7f2ee45f..63cf6e7 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2959,7 +2959,7 @@ static struct module *load_module(void __user *umod,
/* Unlink carefully: kallsyms could be walking list. */
list_del_rcu(&mod->list);
module_bug_cleanup(mod);
-
+ wake_up_all(&module_wq);
ddebug:
dynamic_debug_remove(info.debug);
unlock:
@@ -3034,7 +3034,7 @@ SYSCALL_DEFINE3(init_module, void __user *, umod,
blocking_notifier_call_chain(&module_notify_list,
MODULE_STATE_GOING, mod);
free_module(mod);
- wake_up(&module_wq);
+ wake_up_all(&module_wq);
return ret;
}
if (ret > 0) {
@@ -3046,9 +3046,8 @@ SYSCALL_DEFINE3(init_module, void __user *, umod,
dump_stack();
}
- /* Now it's a first class citizen! Wake up anyone waiting for it. */
+ /* Now it's a first class citizen! */
mod->state = MODULE_STATE_LIVE;
- wake_up(&module_wq);
blocking_notifier_call_chain(&module_notify_list,
MODULE_STATE_LIVE, mod);
@@ -3071,6 +3070,7 @@ SYSCALL_DEFINE3(init_module, void __user *, umod,
mod->init_ro_size = 0;
mod->init_text_size = 0;
mutex_unlock(&module_mutex);
+ wake_up_all(&module_wq);
return 0;
}