p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

This is a high-priority addendum patch for a regression 

introduced by commit 88ffbf3e03. Some code was reverted that
 should not have been. This patch from Andreas Gruenbacher adds
 it back in.
 
 gfs2: Fix glock rhashtable rcu bug
 -----BEGIN PGP SIGNATURE-----
 
 iQEcBAABAgAGBQJZX9rXAAoJENeLYdPf93o7aoIIAIAGxnkPj+uHoaHkOKWWJ28g
 mjaRhPdMxFEdK7U06jJdqI5+nPZjZ9/W4J894ERBkAa685LjOGagkd4oIBHBJ99M
 kD1xIrkNIZC5ThuGbBjnYVq57EoFpsgLgvsLwZ+nYRYCFcphT+IO8hj/fLylayWq
 4LSNGMD8TrbTInVhtEGgFV1M8XI6RY2rQJm0wsYcdcAU+VEVtz25RGR0DMnmnh3m
 t4G1tmUByWfXEr4DCuEqYp9qbJb4sPG/JSoQQCiU/KrWYsm/6nJhXN2rlKNieimL
 /qasyP4LmFEAm5QuTdB0DNSkNTO7ZXm3C1dFwA5i+iNwY7efAeOVIRMSd1Yy4dE=
 =vcj3
 -----END PGP SIGNATURE-----

Merge tag 'gfs2-4.13.fixes.addendum' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2

Pull GFS2 fix from Bob Peterson:
 "Sorry for the additional merge request, but Andreas discovered this
  problem soon after you processed our last gfs2 merge.

  This fixes a regression introduced by a patch we did in mid-2015
  (commit 88ffbf3e037e: "GFS2: Use resizable hash table for glocks"), so
  best to get it fixed. Some code was reverted that should not have
  been.

  The patch from Andreas Gruenbacher just re-adds code that had been
  there originally"

* tag 'gfs2-4.13.fixes.addendum' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
  gfs2: Fix glock rhashtable rcu bug
This commit is contained in:
Linus Torvalds 2017-07-07 17:38:17 -07:00
parent a7d4026834 961ae1d83d
commit 1a86fc754f
2 changed files with 10 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
fs/gfs2/glock.c
View File

@ -80,9 +80,9 @@ static struct rhashtable_params ht_parms = {
static struct rhashtable gl_hash_table;
void gfs2_glock_free(struct gfs2_glock *gl)
static void gfs2_glock_dealloc(struct rcu_head *rcu)
{
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
struct gfs2_glock *gl = container_of(rcu, struct gfs2_glock, gl_rcu);
if (gl->gl_ops->go_flags & GLOF_ASPACE) {
kmem_cache_free(gfs2_glock_aspace_cachep, gl);
@ -90,6 +90,13 @@ void gfs2_glock_free(struct gfs2_glock *gl)
kfree(gl->gl_lksb.sb_lvbptr);
kmem_cache_free(gfs2_glock_cachep, gl);
}
}
void gfs2_glock_free(struct gfs2_glock *gl)
{
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
call_rcu(&gl->gl_rcu, gfs2_glock_dealloc);
if (atomic_dec_and_test(&sdp->sd_glock_disposal))
wake_up(&sdp->sd_glock_wait);
}

1
fs/gfs2/incore.h
View File

@ -373,6 +373,7 @@ struct gfs2_glock {
loff_t end;
} gl_vm;
};
struct rcu_head gl_rcu;
struct rhash_head gl_node;
};