Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1511510 > unrolled thread
| Started by | zhongjiang <zhongjiang@huawei.com> |
|---|---|
| First post | 2016-10-29 08:20 +0200 |
| Last post | 2016-11-04 03:30 +0100 |
| Articles | 5 — 4 participants |
Back to article view | Back to linux.kernel
[RFC PATCH] hugetlbfs: fix the hugetlbfs can not be mounted zhongjiang <zhongjiang@huawei.com> - 2016-10-29 08:20 +0200
Re: [RFC PATCH] hugetlbfs: fix the hugetlbfs can not be mounted zhong jiang <zhongjiang@huawei.com> - 2016-10-29 09:50 +0200
Re: [RFC PATCH] hugetlbfs: fix the hugetlbfs can not be mounted Andrew Morton <akpm@linux-foundation.org> - 2016-11-03 20:20 +0100
Re: [RFC PATCH] hugetlbfs: fix the hugetlbfs can not be mounted Paul Gortmaker <paul.gortmaker@windriver.com> - 2016-11-03 22:00 +0100
Re: [RFC PATCH] hugetlbfs: fix the hugetlbfs can not be mounted zhong jiang <zhongjiang@huawei.com> - 2016-11-04 03:30 +0100
| From | zhongjiang <zhongjiang@huawei.com> |
|---|---|
| Date | 2016-10-29 08:20 +0200 |
| Subject | [RFC PATCH] hugetlbfs: fix the hugetlbfs can not be mounted |
| Message-ID | <sxv9L-2rp-5@gated-at.bofh.it> |
From: zhong jiang <zhongjiang@huawei.com>
Since 'commit 3e89e1c5ea84 ("hugetlb: make mm and fs code explicitly non-modular")'
bring in the mainline. mount hugetlbfs will result in the following issue.
mount: unknown filesystme type 'hugetlbfs'
because previous patch remove the module_alias_fs, when we mount the fs type,
the caller get_fs_type can not find the filesystem.
The patch just recover the module_alias_fs to identify the hugetlbfs.
Signed-off-by: zhong jiang <zhongjiang@huawei.com>
---
fs/hugetlbfs/inode.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 4fb7b10..b63e7de 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -35,6 +35,7 @@
#include <linux/security.h>
#include <linux/magic.h>
#include <linux/migrate.h>
+#include <linux/module.h>
#include <linux/uio.h>
#include <asm/uaccess.h>
@@ -1209,6 +1210,7 @@ static struct dentry *hugetlbfs_mount(struct file_system_type *fs_type,
.mount = hugetlbfs_mount,
.kill_sb = kill_litter_super,
};
+MODULE_ALIAS_FS("hugetlbfs");
static struct vfsmount *hugetlbfs_vfsmount[HUGE_MAX_HSTATE];
--
1.8.3.1
[toc] | [next] | [standalone]
| From | zhong jiang <zhongjiang@huawei.com> |
|---|---|
| Date | 2016-10-29 09:50 +0200 |
| Message-ID | <sxwyS-3dk-7@gated-at.bofh.it> |
| In reply to | #1511510 |
On 2016/10/29 14:08, zhongjiang wrote:
> From: zhong jiang <zhongjiang@huawei.com>
>
> Since 'commit 3e89e1c5ea84 ("hugetlb: make mm and fs code explicitly non-modular")'
> bring in the mainline. mount hugetlbfs will result in the following issue.
>
> mount: unknown filesystme type 'hugetlbfs'
>
> because previous patch remove the module_alias_fs, when we mount the fs type,
> the caller get_fs_type can not find the filesystem.
>
> The patch just recover the module_alias_fs to identify the hugetlbfs.
>
> Signed-off-by: zhong jiang <zhongjiang@huawei.com>
> ---
> fs/hugetlbfs/inode.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
> index 4fb7b10..b63e7de 100644
> --- a/fs/hugetlbfs/inode.c
> +++ b/fs/hugetlbfs/inode.c
> @@ -35,6 +35,7 @@
> #include <linux/security.h>
> #include <linux/magic.h>
> #include <linux/migrate.h>
> +#include <linux/module.h>
> #include <linux/uio.h>
>
> #include <asm/uaccess.h>
> @@ -1209,6 +1210,7 @@ static struct dentry *hugetlbfs_mount(struct file_system_type *fs_type,
> .mount = hugetlbfs_mount,
> .kill_sb = kill_litter_super,
> };
> +MODULE_ALIAS_FS("hugetlbfs");
>
> static struct vfsmount *hugetlbfs_vfsmount[HUGE_MAX_HSTATE];
>
please ignore the patch, It have been fixed.
[toc] | [prev] | [next] | [standalone]
| From | Andrew Morton <akpm@linux-foundation.org> |
|---|---|
| Date | 2016-11-03 20:20 +0100 |
| Message-ID | <szvIl-83J-7@gated-at.bofh.it> |
| In reply to | #1511510 |
On Sat, 29 Oct 2016 14:08:31 +0800 zhongjiang <zhongjiang@huawei.com> wrote:
> From: zhong jiang <zhongjiang@huawei.com>
>
> Since 'commit 3e89e1c5ea84 ("hugetlb: make mm and fs code explicitly non-modular")'
> bring in the mainline. mount hugetlbfs will result in the following issue.
>
> mount: unknown filesystme type 'hugetlbfs'
>
> because previous patch remove the module_alias_fs, when we mount the fs type,
> the caller get_fs_type can not find the filesystem.
>
> The patch just recover the module_alias_fs to identify the hugetlbfs.
hm, 3e89e1c5ea84 ("hugetlb: make mm and fs code explicitly
non-modular") was merged almost a year ago. And you are apparently the
first person to discover this regression. Can you think why that is?
> index 4fb7b10..b63e7de 100644
> --- a/fs/hugetlbfs/inode.c
> +++ b/fs/hugetlbfs/inode.c
> @@ -35,6 +35,7 @@
> #include <linux/security.h>
> #include <linux/magic.h>
> #include <linux/migrate.h>
> +#include <linux/module.h>
> #include <linux/uio.h>
>
> #include <asm/uaccess.h>
> @@ -1209,6 +1210,7 @@ static struct dentry *hugetlbfs_mount(struct file_system_type *fs_type,
> .mount = hugetlbfs_mount,
> .kill_sb = kill_litter_super,
> };
> +MODULE_ALIAS_FS("hugetlbfs");
>
> static struct vfsmount *hugetlbfs_vfsmount[HUGE_MAX_HSTATE];
>
[toc] | [prev] | [next] | [standalone]
| From | Paul Gortmaker <paul.gortmaker@windriver.com> |
|---|---|
| Date | 2016-11-03 22:00 +0100 |
| Message-ID | <szxh7-sf-5@gated-at.bofh.it> |
| In reply to | #1514791 |
[Re: [RFC PATCH] hugetlbfs: fix the hugetlbfs can not be mounted] On 03/11/2016 (Thu 12:17) Andrew Morton wrote:
> On Sat, 29 Oct 2016 14:08:31 +0800 zhongjiang <zhongjiang@huawei.com> wrote:
>
> > From: zhong jiang <zhongjiang@huawei.com>
> >
> > Since 'commit 3e89e1c5ea84 ("hugetlb: make mm and fs code explicitly non-modular")'
> > bring in the mainline. mount hugetlbfs will result in the following issue.
> >
> > mount: unknown filesystme type 'hugetlbfs'
The fact that the above has a typo makes me doubt it was real output
from "mount". In any case, that just means they didn't enable the
Kconfig option for it and hence it is not in /proc/filesystems as they
can easily verify.
> >
> > because previous patch remove the module_alias_fs, when we mount the fs type,
> > the caller get_fs_type can not find the filesystem.
> >
> > The patch just recover the module_alias_fs to identify the hugetlbfs.
>
> hm, 3e89e1c5ea84 ("hugetlb: make mm and fs code explicitly
> non-modular") was merged almost a year ago. And you are apparently the
> first person to discover this regression. Can you think why that is?
Agreed -- I'd like to know just how this conclusion was reached. Maybe
they are running some out-of-tree patches to make it modular? Who
knows. It would be nice if we hear back, but I don't have high hopes.
In any case, 3e89e1c5ea84 commit log says:
Also note that MODULE_ALIAS is a no-op for non-modular code.
This isn't fundamentally hard to verify; the macros are:
#define MODULE_ALIAS_FS(NAME) MODULE_ALIAS("fs-" NAME)
#define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)
#define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)
...and then finally:
#ifdef MODULE
#define __MODULE_INFO(tag, name, info) \
static const char __UNIQUE_ID(name)[] \
__used __attribute__((section(".modinfo"), unused, aligned(1))) \
= __stringify(tag) "=" info
#else /* !MODULE */
/* This struct is here for syntactic coherency, it is not used */
#define __MODULE_INFO(tag, name, info) \
struct __UNIQUE_ID(name) {}
#endif
...so a commit like this would have to explain how the patch does anything in
the !MODULE case, when the syntax comment above even indicates it is not used.
I remember this commit since there was patch order issue that the kbuild
robot uncovered (as listed in the commit log) in an earlier version of it.
So I can assure the patch poster that hugetlbfs was mounted for testing,
and they should revisit the logic that led to this no-op patch.
Paul.
--
>
> > index 4fb7b10..b63e7de 100644
> > --- a/fs/hugetlbfs/inode.c
> > +++ b/fs/hugetlbfs/inode.c
> > @@ -35,6 +35,7 @@
> > #include <linux/security.h>
> > #include <linux/magic.h>
> > #include <linux/migrate.h>
> > +#include <linux/module.h>
> > #include <linux/uio.h>
> >
> > #include <asm/uaccess.h>
> > @@ -1209,6 +1210,7 @@ static struct dentry *hugetlbfs_mount(struct file_system_type *fs_type,
> > .mount = hugetlbfs_mount,
> > .kill_sb = kill_litter_super,
> > };
> > +MODULE_ALIAS_FS("hugetlbfs");
> >
> > static struct vfsmount *hugetlbfs_vfsmount[HUGE_MAX_HSTATE];
> >
>
[toc] | [prev] | [next] | [standalone]
| From | zhong jiang <zhongjiang@huawei.com> |
|---|---|
| Date | 2016-11-04 03:30 +0100 |
| Message-ID | <szCqt-3Sx-11@gated-at.bofh.it> |
| In reply to | #1514791 |
On 2016/11/4 3:17, Andrew Morton wrote:
> On Sat, 29 Oct 2016 14:08:31 +0800 zhongjiang <zhongjiang@huawei.com> wrote:
>
>> From: zhong jiang <zhongjiang@huawei.com>
>>
>> Since 'commit 3e89e1c5ea84 ("hugetlb: make mm and fs code explicitly non-modular")'
>> bring in the mainline. mount hugetlbfs will result in the following issue.
>>
>> mount: unknown filesystme type 'hugetlbfs'
>>
>> because previous patch remove the module_alias_fs, when we mount the fs type,
>> the caller get_fs_type can not find the filesystem.
>>
>> The patch just recover the module_alias_fs to identify the hugetlbfs.
> hm, 3e89e1c5ea84 ("hugetlb: make mm and fs code explicitly
> non-modular") was merged almost a year ago. And you are apparently the
> first person to discover this regression. Can you think why that is?
when I pull the upstream patch in 4.9-rc2. I find that I cannot mount the hugetlbfs.
but when I pull the upstream remain patch in the next day. I test again. it work well.
so I reply the mail right now, please ignore the patch. The detailed reason is not digged.
I am sorry for wasting your time.
Thanks you
zhongjiang
>> index 4fb7b10..b63e7de 100644
>> --- a/fs/hugetlbfs/inode.c
>> +++ b/fs/hugetlbfs/inode.c
>> @@ -35,6 +35,7 @@
>> #include <linux/security.h>
>> #include <linux/magic.h>
>> #include <linux/migrate.h>
>> +#include <linux/module.h>
>> #include <linux/uio.h>
>>
>> #include <asm/uaccess.h>
>> @@ -1209,6 +1210,7 @@ static struct dentry *hugetlbfs_mount(struct file_system_type *fs_type,
>> .mount = hugetlbfs_mount,
>> .kill_sb = kill_litter_super,
>> };
>> +MODULE_ALIAS_FS("hugetlbfs");
>>
>> static struct vfsmount *hugetlbfs_vfsmount[HUGE_MAX_HSTATE];
>>
>
> .
>
[toc] | [prev] | [standalone]
Back to top | Article view | linux.kernel
csiph-web