diff options
author | Steven Whitehouse <swhiteho@redhat.com> | 2008-05-21 18:03:22 +0200 |
---|---|---|
committer | Steven Whitehouse <swhiteho@redhat.com> | 2008-06-27 10:39:22 +0200 |
commit | 6802e3400ff4549525930ee744030c36fce9cc73 (patch) | |
tree | db889bf5337c1d3bb12ebbf571c3c1cad1040496 /fs/gfs2/glock.h | |
parent | Linux 2.6.26-rc8 (diff) | |
download | linux-6802e3400ff4549525930ee744030c36fce9cc73.tar.xz linux-6802e3400ff4549525930ee744030c36fce9cc73.zip |
[GFS2] Clean up the glock core
This patch implements a number of cleanups to the core of the
GFS2 glock code. As a result a lot of code is removed. It looks
like a really big change, but actually a large part of this patch
is either removing or moving existing code.
There are some new bits too though, such as the new run_queue()
function which is considerably streamlined. Highlights of this
patch include:
o Fixes a cluster coherency bug during SH -> EX lock conversions
o Removes the "glmutex" code in favour of a single bit lock
o Removes the ->go_xmote_bh() for inodes since it was duplicating
->go_lock()
o We now only use the ->lm_lock() function for both locks and
unlocks (i.e. unlock is a lock with target mode LM_ST_UNLOCKED)
o The fast path is considerably shortly, giving performance gains
especially with lock_nolock
o The glock_workqueue is now used for all the callbacks from the DLM
which allows us to simplify the lock_dlm module (see following patch)
o The way is now open to make further changes such as eliminating the two
threads (gfs2_glockd and gfs2_scand) in favour of a more efficient
scheme.
This patch has undergone extensive testing with various test suites
so it should be pretty stable by now.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Cc: Bob Peterson <rpeterso@redhat.com>
Diffstat (limited to 'fs/gfs2/glock.h')
-rw-r--r-- | fs/gfs2/glock.h | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h index cdad3e6f8150..7389f8ef0a31 100644 --- a/fs/gfs2/glock.h +++ b/fs/gfs2/glock.h @@ -26,11 +26,8 @@ #define GL_SKIP 0x00000100 #define GL_ATIME 0x00000200 #define GL_NOCACHE 0x00000400 -#define GL_FLOCK 0x00000800 -#define GL_NOCANCEL 0x00001000 #define GLR_TRYFAILED 13 -#define GLR_CANCELED 14 static inline struct gfs2_holder *gfs2_glock_is_locked_by_me(struct gfs2_glock *gl) { @@ -41,6 +38,8 @@ static inline struct gfs2_holder *gfs2_glock_is_locked_by_me(struct gfs2_glock * spin_lock(&gl->gl_spin); pid = task_pid(current); list_for_each_entry(gh, &gl->gl_holders, gh_list) { + if (!test_bit(HIF_HOLDER, &gh->gh_iflags)) + break; if (gh->gh_owner_pid == pid) goto out; } @@ -70,7 +69,7 @@ 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) || !list_empty(&gl->gl_waiters3); + ret = test_bit(GLF_DEMOTE, &gl->gl_flags); spin_unlock(&gl->gl_spin); return ret; } @@ -98,6 +97,7 @@ int gfs2_glock_nq_num(struct gfs2_sbd *sdp, int gfs2_glock_nq_m(unsigned int num_gh, struct gfs2_holder *ghs); void gfs2_glock_dq_m(unsigned int num_gh, struct gfs2_holder *ghs); void gfs2_glock_dq_uninit_m(unsigned int num_gh, struct gfs2_holder *ghs); +void gfs2_print_dbg(struct seq_file *seq, const char *fmt, ...); /** * gfs2_glock_nq_init - intialize a holder and enqueue it on a glock @@ -130,7 +130,6 @@ int gfs2_lvb_hold(struct gfs2_glock *gl); void gfs2_lvb_unhold(struct gfs2_glock *gl); void gfs2_glock_cb(void *cb_data, unsigned int type, void *data); - void gfs2_glock_schedule_for_reclaim(struct gfs2_glock *gl); void gfs2_reclaim_glock(struct gfs2_sbd *sdp); void gfs2_gl_hash_clear(struct gfs2_sbd *sdp, int wait); |