linux-ext4 - Re: [PATCH 7/7] ext4: add might

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Date:	Tue, 26 Mar 2013 10:49:50 +0100 (CET)
From:	Lukáš Czerner <lczerner@...hat.com>
To:	Lukáš Czerner <lczerner@...hat.com>
cc:	"Theodore Ts'o" <tytso@....edu>,
	Ext4 Developers List <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH 7/7] ext4: add might_sleep() annotations

On Tue, 26 Mar 2013, Lukáš Czerner wrote:

> Date: Tue, 26 Mar 2013 10:48:00 +0100 (CET)
> From: Lukáš Czerner <lczerner@...hat.com>
> To: Theodore Ts'o <tytso@....edu>
> Cc: Ext4 Developers List <linux-ext4@...r.kernel.org>
> Subject: Re: [PATCH 7/7] ext4: add might_sleep() annotations
> 
> On Sun, 24 Mar 2013, Theodore Ts'o wrote:
> 
> > Date: Sun, 24 Mar 2013 20:06:54 -0400
> > From: Theodore Ts'o <tytso@....edu>
> > To: Ext4 Developers List <linux-ext4@...r.kernel.org>
> > Cc: Theodore Ts'o <tytso@....edu>
> > Subject: [PATCH 7/7] ext4: add might_sleep() annotations
> 
> Looks good and useful.
> 
> Thanks!
> Signed-off-by: Lukas Czerner <lczerner@...hat.com>

oops, wrong tag sorry :) I meant to say

Reviewed-by: Lukas Czerner <lczerner@...hat.com>

> 
> 
> > 
> > Signed-off-by: "Theodore Ts'o" <tytso@....edu>
> > ---
> >  fs/ext4/ext4_jbd2.c | 6 ++++++
> >  fs/ext4/mballoc.c   | 4 ++++
> >  2 files changed, 10 insertions(+)
> > 
> > diff --git a/fs/ext4/ext4_jbd2.c b/fs/ext4/ext4_jbd2.c
> > index 7058975..0e1dc9e 100644
> > --- a/fs/ext4/ext4_jbd2.c
> > +++ b/fs/ext4/ext4_jbd2.c
> > @@ -43,6 +43,8 @@ handle_t *__ext4_journal_start_sb(struct super_block *sb, unsigned int line,
> >  {
> >  	journal_t *journal;
> >  
> > +	might_sleep();
> > +
> >  	trace_ext4_journal_start(sb, nblocks, _RET_IP_);
> >  	if (sb->s_flags & MS_RDONLY)
> >  		return ERR_PTR(-EROFS);
> > @@ -113,6 +115,8 @@ int __ext4_journal_get_write_access(const char *where, unsigned int line,
> >  {
> >  	int err = 0;
> >  
> > +	might_sleep();
> > +
> >  	if (ext4_handle_valid(handle)) {
> >  		err = jbd2_journal_get_write_access(handle, bh);
> >  		if (err)
> > @@ -209,6 +213,8 @@ int __ext4_handle_dirty_metadata(const char *where, unsigned int line,
> >  {
> >  	int err = 0;
> >  
> > +	might_sleep();
> > +
> >  	if (ext4_handle_valid(handle)) {
> >  		err = jbd2_journal_dirty_metadata(handle, bh);
> >  		if (err) {
> > diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
> > index ee6614b..36c82a3 100644
> > --- a/fs/ext4/mballoc.c
> > +++ b/fs/ext4/mballoc.c
> > @@ -1011,6 +1011,7 @@ int ext4_mb_init_group(struct super_block *sb, ext4_group_t group)
> >  	struct page *page;
> >  	int ret = 0;
> >  
> > +	might_sleep();
> >  	mb_debug(1, "init group %u\n", group);
> >  	this_grp = ext4_get_group_info(sb, group);
> >  	/*
> > @@ -1082,6 +1083,7 @@ ext4_mb_load_buddy(struct super_block *sb, ext4_group_t group,
> >  	struct ext4_sb_info *sbi = EXT4_SB(sb);
> >  	struct inode *inode = sbi->s_buddy_cache;
> >  
> > +	might_sleep();
> >  	mb_debug(1, "load group %u\n", group);
> >  
> >  	blocks_per_page = PAGE_CACHE_SIZE / sb->s_blocksize;
> > @@ -4217,6 +4219,7 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle,
> >  	unsigned int inquota = 0;
> >  	unsigned int reserv_clstrs = 0;
> >  
> > +	might_sleep();
> >  	sb = ar->inode->i_sb;
> >  	sbi = EXT4_SB(sb);
> >  
> > @@ -4470,6 +4473,7 @@ void ext4_free_blocks(handle_t *handle, struct inode *inode,
> >  	int err = 0;
> >  	int ret;
> >  
> > +	might_sleep();
> >  	if (bh) {
> >  		if (block)
> >  			BUG_ON(block != bh->b_blocknr);
> > 
> --
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