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Commit a9280fed authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'reiserfs/kill-bkl' of... 

Merge branch 'reiserfs/kill-bkl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing

* 'reiserfs/kill-bkl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing: (31 commits)
  kill-the-bkl/reiserfs: turn GFP_ATOMIC flag to GFP_NOFS in reiserfs_get_block()
  kill-the-bkl/reiserfs: drop the fs race watchdog from _get_block_create_0()
  kill-the-bkl/reiserfs: definitely drop the bkl from reiserfs_ioctl()
  kill-the-bkl/reiserfs: always lock the ioctl path
  kill-the-bkl/reiserfs: fix reiserfs lock to cpu_add_remove_lock dependency
  kill-the-bkl/reiserfs: Fix induced mm->mmap_sem to sysfs_mutex dependency
  kill-the-bkl/reiserfs: panic in case of lock imbalance
  kill-the-bkl/reiserfs: fix recursive reiserfs write lock in reiserfs_commit_write()
  kill-the-bkl/reiserfs: fix recursive reiserfs lock in reiserfs_mkdir()
  kill-the-bkl/reiserfs: fix "reiserfs lock" / "inode mutex" lock inversion dependency
  kill-the-bkl/reiserfs: move the concurrent tree accesses checks per superblock
  kill-the-bkl/reiserfs: acquire the inode mutex safely
  kill-the-bkl/reiserfs: unlock only when needed in search_by_key
  kill-the-bkl/reiserfs: use mutex_lock in reiserfs_mutex_lock_safe
  kill-the-bkl/reiserfs: factorize the locking in reiserfs_write_end()
  kill-the-bkl/reiserfs: reduce number of contentions in search_by_key()
  kill-the-bkl/reiserfs: don't hold the write recursively in reiserfs_lookup()
  kill-the-bkl/reiserfs: lock only once on reiserfs_get_block()
  kill-the-bkl/reiserfs: conditionaly release the write lock on fs_changed()
  kill-the-BKL/reiserfs: add reiserfs_cond_resched()
  ...
parents 2b876f95 1d2c6cfd

fs/reiserfs/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -7,7 +7,7 @@ obj-$(CONFIG_REISERFS_FS) += reiserfs.o 
reiserfs-objs := bitmap.o do_balan.o namei.o inode.o file.o dir.o fix_node.o \

		 super.o prints.o objectid.o lbalance.o ibalance.o stree.o \

		 hashes.o tail_conversion.o journal.o resize.o \

		 item_ops.o ioctl.o procfs.o xattr.o

		 item_ops.o ioctl.o procfs.o xattr.o lock.o



ifeq ($(CONFIG_REISERFS_FS_XATTR),y)

reiserfs-objs += xattr_user.o xattr_trusted.o

fs/reiserfs/bitmap.c

+4 −0
Original line number Diff line number Diff line
@@ -1249,14 +1249,18 @@ struct buffer_head *reiserfs_read_bitmap_block(struct super_block *sb, 
	else if (bitmap == 0)

		block = (REISERFS_DISK_OFFSET_IN_BYTES >> sb->s_blocksize_bits) + 1;



	reiserfs_write_unlock(sb);

	bh = sb_bread(sb, block);

	reiserfs_write_lock(sb);

	if (bh == NULL)

		reiserfs_warning(sb, "sh-2029: %s: bitmap block (#%u) "

		                 "reading failed", __func__, block);

	else {

		if (buffer_locked(bh)) {

			PROC_INFO_INC(sb, scan_bitmap.wait);

			reiserfs_write_unlock(sb);

			__wait_on_buffer(bh);

			reiserfs_write_lock(sb);

		}

		BUG_ON(!buffer_uptodate(bh));

		BUG_ON(atomic_read(&bh->b_count) == 0);

fs/reiserfs/dir.c

+9 −1
Original line number Diff line number Diff line
@@ -20,7 +20,7 @@ const struct file_operations reiserfs_dir_operations = { 
	.read = generic_read_dir,

	.readdir = reiserfs_readdir,

	.fsync = reiserfs_dir_fsync,

	.ioctl = reiserfs_ioctl,

	.unlocked_ioctl = reiserfs_ioctl,

#ifdef CONFIG_COMPAT

	.compat_ioctl = reiserfs_compat_ioctl,

#endif
@@ -174,14 +174,22 @@ int reiserfs_readdir_dentry(struct dentry *dentry, void *dirent, 
				// user space buffer is swapped out. At that time

				// entry can move to somewhere else

				memcpy(local_buf, d_name, d_reclen);



				/*

				 * Since filldir might sleep, we can release

				 * the write lock here for other waiters

				 */

				reiserfs_write_unlock(inode->i_sb);

				if (filldir

				    (dirent, local_buf, d_reclen, d_off, d_ino,

				     DT_UNKNOWN) < 0) {

					reiserfs_write_lock(inode->i_sb);

					if (local_buf != small_buf) {

						kfree(local_buf);

					}

					goto end;

				}

				reiserfs_write_lock(inode->i_sb);

				if (local_buf != small_buf) {

					kfree(local_buf);

				}

fs/reiserfs/do_balan.c

+5 −12
Original line number Diff line number Diff line
@@ -21,14 +21,6 @@ 
#include <linux/buffer_head.h>

#include <linux/kernel.h>



#ifdef CONFIG_REISERFS_CHECK



struct tree_balance *cur_tb = NULL;	/* detects whether more than one

					   copy of tb exists as a means

					   of checking whether schedule

					   is interrupting do_balance */

#endif



static inline void buffer_info_init_left(struct tree_balance *tb,

                                         struct buffer_info *bi)

{
@@ -1840,11 +1832,12 @@ static int check_before_balancing(struct tree_balance *tb) 
{

	int retval = 0;



	if (cur_tb) {

	if (REISERFS_SB(tb->tb_sb)->cur_tb) {

		reiserfs_panic(tb->tb_sb, "vs-12335", "suspect that schedule "

			       "occurred based on cur_tb not being null at "

			       "this point in code. do_balance cannot properly "

			       "handle schedule occurring while it runs.");

			       "handle concurrent tree accesses on a same "

			       "mount point.");

	}



	/* double check that buffers that we will modify are unlocked. (fix_nodes should already have
@@ -1986,7 +1979,7 @@ static inline void do_balance_starts(struct tree_balance *tb) 
	     "check");*/

	RFALSE(check_before_balancing(tb), "PAP-12340: locked buffers in TB");

#ifdef CONFIG_REISERFS_CHECK

	cur_tb = tb;

	REISERFS_SB(tb->tb_sb)->cur_tb = tb;

#endif

}
@@ -1996,7 +1989,7 @@ static inline void do_balance_completed(struct tree_balance *tb) 
#ifdef CONFIG_REISERFS_CHECK

	check_leaf_level(tb);

	check_internal_levels(tb);

	cur_tb = NULL;

	REISERFS_SB(tb->tb_sb)->cur_tb = NULL;

#endif



	/* reiserfs_free_block is no longer schedule safe.  So, we need to

fs/reiserfs/file.c

+1 −1
Original line number Diff line number Diff line
@@ -284,7 +284,7 @@ static ssize_t reiserfs_file_write(struct file *file, /* the file we are going t 
const struct file_operations reiserfs_file_operations = {

	.read = do_sync_read,

	.write = reiserfs_file_write,

	.ioctl = reiserfs_ioctl,

	.unlocked_ioctl = reiserfs_ioctl,

#ifdef CONFIG_COMPAT

	.compat_ioctl = reiserfs_compat_ioctl,

#endif