From 91094d0fb650decd8bf48b85d86c892d7ca913ee Mon Sep 17 00:00:00 2001 From: Steven Whitehouse Date: Fri, 11 Sep 2009 15:21:56 +0100 Subject: GFS2: Remove obsolete code in quota.c There is no point in testing for GLF_DEMOTE here, we might as well always release the glock at that point. Signed-off-by: Steven Whitehouse --- fs/gfs2/glock.h | 9 --------- 1 file changed, 9 deletions(-) (limited to 'fs/gfs2/glock.h') diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h index c609894ec0d0..13f0bd228132 100644 --- a/fs/gfs2/glock.h +++ b/fs/gfs2/glock.h @@ -180,15 +180,6 @@ static inline int gfs2_glock_is_held_shrd(struct gfs2_glock *gl) return gl->gl_state == LM_ST_SHARED; } -static inline int gfs2_glock_is_blocking(struct gfs2_glock *gl) -{ - int ret; - spin_lock(&gl->gl_spin); - ret = test_bit(GLF_DEMOTE, &gl->gl_flags); - spin_unlock(&gl->gl_spin); - return ret; -} - int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number, const struct gfs2_glock_operations *glops, int create, struct gfs2_glock **glp); -- cgit v1.2.2 From 8f05228ee7c8f409ae3c6f9c3e13d7ccb9c18360 Mon Sep 17 00:00:00 2001 From: Steven Whitehouse Date: Fri, 29 Jan 2010 15:21:27 +0000 Subject: GFS2: Extend umount wait coverage to full glock lifetime Although all glocks are, by the time of the umount glock wait, scheduled for demotion, some of them haven't made it far enough through the process for the original set of waiting code to wait for them. This extends the ref count to the whole glock lifetime in order to ensure that the waiting does catch all glocks. It does make it a bit more invasive, but it seems the only sensible solution at the moment. Signed-off-by: Steven Whitehouse --- fs/gfs2/glock.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/gfs2/glock.h') diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h index 13f0bd228132..c0262faf4725 100644 --- a/fs/gfs2/glock.h +++ b/fs/gfs2/glock.h @@ -123,7 +123,7 @@ struct lm_lockops { int (*lm_mount) (struct gfs2_sbd *sdp, const char *fsname); void (*lm_unmount) (struct gfs2_sbd *sdp); void (*lm_withdraw) (struct gfs2_sbd *sdp); - void (*lm_put_lock) (struct kmem_cache *cachep, void *gl); + void (*lm_put_lock) (struct kmem_cache *cachep, struct gfs2_glock *gl); unsigned int (*lm_lock) (struct gfs2_glock *gl, unsigned int req_state, unsigned int flags); void (*lm_cancel) (struct gfs2_glock *gl); -- cgit v1.2.2 From 009d851837ab26cab18adda6169a813f70b0b21b Mon Sep 17 00:00:00 2001 From: Steven Whitehouse Date: Tue, 8 Dec 2009 12:12:13 +0000 Subject: GFS2: Metadata address space clean up Since the start of GFS2, an "extra" inode has been used to store the metadata belonging to each inode. The only reason for using this inode was to have an extra address space, the other fields were unused. This means that the memory usage was rather inefficient. The reason for keeping each inode's metadata in a separate address space is that when glocks are requested on remote nodes, we need to be able to efficiently locate the data and metadata which relating to that glock (inode) in order to sync or sync and invalidate it (depending on the remotely requested lock mode). This patch adds a new type of glock, which has in addition to its normal fields, has an address space. This applies to all inode and rgrp glocks (but to no other glock types which remain as before). As a result, we no longer need to have the second inode. This results in three major improvements: 1. A saving of approx 25% of memory used in caching inodes 2. A removal of the circular dependency between inodes and glocks 3. No confusion between "normal" and "metadata" inodes in super.c Although the first of these is the more immediately apparent, the second is just as important as it now enables a number of clean ups at umount time. Those will be the subject of future patches. Signed-off-by: Steven Whitehouse --- fs/gfs2/glock.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'fs/gfs2/glock.h') diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h index c0262faf4725..2bda1911b156 100644 --- a/fs/gfs2/glock.h +++ b/fs/gfs2/glock.h @@ -180,6 +180,13 @@ static inline int gfs2_glock_is_held_shrd(struct gfs2_glock *gl) return gl->gl_state == LM_ST_SHARED; } +static inline struct address_space *gfs2_glock2aspace(struct gfs2_glock *gl) +{ + if (gl->gl_ops->go_flags & GLOF_ASPACE) + return (struct address_space *)(gl + 1); + return NULL; +} + int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number, const struct gfs2_glock_operations *glops, int create, struct gfs2_glock **glp); -- cgit v1.2.2