kernel.git/fs/gfs2/glock.c, branch linux-4.3.y

gfs2: A minor "sbstats" cleanup

2015-09-03T18:34:14Z

It seems cleaner to avoid the temporary value here. Signed-off-by: Andreas Gruenbacher Signed-off-by: Bob Peterson

gfs2: Make statistics unsigned, suitable for use with do_div()

2015-09-03T18:33:32Z

None of these statistics can meaningfully be negative, and the numerator for do_div() must have the type u64. The generic implementation of do_div() used on some 32-bit architectures asserts that, resulting in a compiler error in gfs2_rgrp_congested(). Fixes: 0166b197c2ed ("GFS2: Average in only non-zero round-trip times ...") Signed-off-by: Ben Hutchings Signed-off-by: Bob Peterson Acked-by: Andreas Gruenbacher

GFS2: Use resizable hash table for glocks

2015-09-03T18:33:24Z

This patch changes the glock hash table from a normal hash table to a resizable hash table, which scales better. This also simplifies a lot of code. Signed-off-by: Bob Peterson Signed-off-by: Andreas Gruenbacher Acked-by: Steven Whitehouse

GFS2: Move glock superblock pointer to field gl_name

2015-09-03T18:33:09Z

What uniquely identifies a glock in the glock hash table is not gl_name, but gl_name and its superblock pointer. This patch makes the gl_name field correspond to a unique glock identifier. That will allow us to simplify hashing with a future patch, since the hash algorithm can then take the gl_name and hash its components in one operation. Signed-off-by: Bob Peterson Signed-off-by: Andreas Gruenbacher Acked-by: Steven Whitehouse

gfs2: Simplify the seq file code for "sbstats"

2015-09-03T18:33:05Z

Don't use struct gfs2_glock_iter as the helper data structure for iterating through "sbstats"; we are not iterating through glocks here. Signed-off-by: Andreas Gruenbacher Signed-off-by: Bob Peterson

GFS2: Don't add all glocks to the lru

2015-06-18T17:17:59Z

The glocks used for resource groups often come and go hundreds of thousands of times per second. Adding them to the lru list just adds unnecessary contention for the lru_lock spin_lock, especially considering we're almost certainly going to re-use the glock and take it back off the lru microseconds later. We never want the glock shrinker to cull them anyway. This patch adds a new bit in the glops that determines which glock types get put onto the lru list and which ones don't. Signed-off-by: Bob Peterson Acked-by: Steven Whitehouse

gfs2: incorrect check for debugfs returns

2015-03-30T14:13:29Z

debugfs_create_dir and debugfs_create_file may return -ENODEV when debugfs is not configured, so the return value should be checked against ERROR_VALUE as well, otherwise the later dereference of the dentry pointer would crash the kernel. Signed-off-by: Chengyu Song Signed-off-by: Bob Peterson Acked-by: Steven Whitehouse

Merge branch 'for-3.20/bdi' of git://git.kernel.dk/linux-block

2015-02-12T21:50:21Z

Pull backing device changes from Jens Axboe: "This contains a cleanup of how the backing device is handled, in preparation for a rework of the life time rules. In this part, the most important change is to split the unrelated nommu mmap flags from it, but also removing a backing_dev_info pointer from the address_space (and inode), and a cleanup of other various minor bits. Christoph did all the work here, I just fixed an oops with pages that have a swap backing. Arnd fixed a missing export, and Oleg killed the lustre backing_dev_info from staging. Last patch was from Al, unexporting parts that are now no longer needed outside" * 'for-3.20/bdi' of git://git.kernel.dk/linux-block: Make super_blocks and sb_lock static mtd: export new mtd_mmap_capabilities fs: make inode_to_bdi() handle NULL inode staging/lustre/llite: get rid of backing_dev_info fs: remove default_backing_dev_info fs: don't reassign dirty inodes to default_backing_dev_info nfs: don't call bdi_unregister ceph: remove call to bdi_unregister fs: remove mapping->backing_dev_info fs: export inode_to_bdi and use it in favor of mapping->backing_dev_info nilfs2: set up s_bdi like the generic mount_bdev code block_dev: get bdev inode bdi directly from the block device block_dev: only write bdev inode on close fs: introduce f_op->mmap_capabilities for nommu mmap support fs: kill BDI_CAP_SWAP_BACKED fs: deduplicate noop_backing_dev_info

fs: remove mapping->backing_dev_info

2015-01-20T21:03:05Z

Now that we never use the backing_dev_info pointer in struct address_space we can simply remove it and save 4 to 8 bytes in every inode. Signed-off-by: Christoph Hellwig Acked-by: Ryusuke Konishi Reviewed-by: Tejun Heo Reviewed-by: Jan Kara Signed-off-by: Jens Axboe

GFS2: Eliminate __gfs2_glock_remove_from_lru

2015-01-09T11:33:13Z

Since the only caller of function __gfs2_glock_remove_from_lru locks the same spin_lock as gfs2_glock_remove_from_lru, the functions can be combined. Signed-off-by: Bob Peterson Signed-off-by: Steven Whitehouse