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Old 04-15-2008, 06:05 PM
 
Default Cluster Project branch, STABLE2, updated. cluster-2.03.00-12-g86a728d

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http://sources.redhat.com/git/gitweb.cgi?p=cluster.git;a=commitdiff;h=86a728d286 e95b6db8a46ecd8c9b9a6540d2b138

The branch, STABLE2 has been updated
via 86a728d286e95b6db8a46ecd8c9b9a6540d2b138 (commit)
from c6bb7557e85b3363ff0fd10f1411373f4b747366 (commit)

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- Log -----------------------------------------------------------------
commit 86a728d286e95b6db8a46ecd8c9b9a6540d2b138
Author: David Teigland <teigland@redhat.com>
Date: Mon Mar 31 10:09:37 2008 -0500

gfs: don't cancel glocks when writing to hidden file

bz 438268

When glock.c sees the PRIORITY flag, it cancels any outstanding
glocks prior to doing the lock request. lock_dlm also uses the
PRIORITY flag to give give granting priority to the lock in the
dlm. Both of these are necessary when the PRIORITY glock is used
for recovery, but only the second is wanted (neither is really
needed) when writing to a hidden file. A new GL_NOCANCEL_OTHER
flag, combined with PRIORITY, is used to tell glock.c to not do
the cancels.

Signed-off-by: David Teigland <teigland@redhat.com>

-----------------------------------------------------------------------

Summary of changes:
gfs-kernel/src/gfs/glock.c | 3 ++-
gfs-kernel/src/gfs/glock.h | 1 +
gfs-kernel/src/gfs/ioctl.c | 3 ++-
3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/gfs-kernel/src/gfs/glock.c b/gfs-kernel/src/gfs/glock.c
index f112f5f..f4ceaed 100644
--- a/gfs-kernel/src/gfs/glock.c
+++ b/gfs-kernel/src/gfs/glock.c
@@ -1336,7 +1336,8 @@ glock_wait_internal(struct gfs_holder *gh)
spin_unlock(&gl->gl_spin);
}

- if (gh->gh_flags & LM_FLAG_PRIORITY)
+ if ((gh->gh_flags & LM_FLAG_PRIORITY) &&
+ !(gh->gh_flags & GL_NOCANCEL_OTHER))
do_cancels(gh);

wait_for_completion(&gh->gh_wait);
diff --git a/gfs-kernel/src/gfs/glock.h b/gfs-kernel/src/gfs/glock.h
index fb1e210..c9bd819 100644
--- a/gfs-kernel/src/gfs/glock.h
+++ b/gfs-kernel/src/gfs/glock.h
@@ -34,6 +34,7 @@
#define GL_SYNC (0x00000800) /* Sync to disk when no more holders */
#define GL_NOCANCEL (0x00001000) /* Don't ever cancel this request */
#define GL_READPAGE (0x00002000) /* gfs_readpage() issued this lock request */
+#define GL_NOCANCEL_OTHER (0x00004000) /* Don't cancel other locks for this */

#define GLR_TRYFAILED (13)
#define GLR_CANCELED (14)
diff --git a/gfs-kernel/src/gfs/ioctl.c b/gfs-kernel/src/gfs/ioctl.c
index 1133c8f..32db45c 100644
--- a/gfs-kernel/src/gfs/ioctl.c
+++ b/gfs-kernel/src/gfs/ioctl.c
@@ -1223,7 +1223,8 @@ gi_do_hfile_write(struct gfs_sbd *sdp, struct gfs_ioctl *gi, int from_user)
gfs_write_calc_reserv(ip, gi->gi_size, &data_blocks, &ind_blocks);

error = gfs_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE,
- LM_FLAG_PRIORITY | GL_SYNC, &i_gh);
+ LM_FLAG_PRIORITY | GL_SYNC | GL_NOCANCEL_OTHER,
+ &i_gh);
if (error)
return error;



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