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Registered in England and Wales under Company Registration No. 3798903 Subject: [RFC PATCH 15/76] fscache: Change %p in format strings to something else From: David Howells To: Trond Myklebust , Anna Schumaker , Steve French , Dominique Martinet Cc: dhowells@redhat.com, Jeff Layton , Matthew Wilcox , Alexander Viro , linux-cachefs@redhat.com, linux-afs@lists.infradead.org, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, ceph-devel@vger.kernel.org, v9fs-developer@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Date: Fri, 20 Nov 2020 15:05:48 +0000 Message-ID: <160588474843.3465195.5446072310069374803.stgit@warthog.procyon.org.uk> In-Reply-To: <160588455242.3465195.3214733858273019178.stgit@warthog.procyon.org.uk> References: <160588455242.3465195.3214733858273019178.stgit@warthog.procyon.org.uk> User-Agent: StGit/0.23 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org Change plain %p in format strings in fscache code to something more useful, since %p is now hashed before printing and thus no longer matches the contents of an oops register dump. Signed-off-by: David Howells --- fs/fscache/cache.c | 8 ++++---- fs/fscache/cookie.c | 16 +++++++--------- fs/fscache/object.c | 1 - 3 files changed, 11 insertions(+), 14 deletions(-) diff --git a/fs/fscache/cache.c b/fs/fscache/cache.c index 92f747b72ec3..60fa68c7da3a 100644 --- a/fs/fscache/cache.c +++ b/fs/fscache/cache.c @@ -118,7 +118,7 @@ struct fscache_cache *fscache_select_cache_for_object( cache = NULL; spin_unlock(&cookie->lock); - _leave(" = %p [parent]", cache); + _leave(" = %s [parent]", cache ? cache->tag->name : "NULL"); return cache; } @@ -144,14 +144,14 @@ struct fscache_cache *fscache_select_cache_for_object( if (test_bit(FSCACHE_IOERROR, &tag->cache->flags)) return NULL; - _leave(" = %p [specific]", tag->cache); + _leave(" = %s [specific]", tag->name); return tag->cache; no_preference: /* netfs has no preference - just select first cache */ cache = list_entry(fscache_cache_list.next, struct fscache_cache, link); - _leave(" = %p [first]", cache); + _leave(" = %s [first]", cache->tag->name); return cache; } @@ -324,7 +324,7 @@ static void fscache_withdraw_all_objects(struct fscache_cache *cache, struct fscache_object, cache_link); list_move_tail(&object->cache_link, dying_objects); - _debug("withdraw %p", object->cookie); + _debug("withdraw %x", object->cookie->debug_id); /* This must be done under object_list_lock to prevent * a race with fscache_drop_object(). diff --git a/fs/fscache/cookie.c b/fs/fscache/cookie.c index aa33d16711e1..0346bc7f5818 100644 --- a/fs/fscache/cookie.c +++ b/fs/fscache/cookie.c @@ -369,7 +369,7 @@ void __fscache_enable_cookie(struct fscache_cookie *cookie, bool (*can_enable)(void *data), void *data) { - _enter("%p", cookie); + _enter("%x", cookie->debug_id); trace_fscache_enable(cookie); @@ -464,10 +464,8 @@ static int fscache_acquire_non_index_cookie(struct fscache_cookie *cookie) /* we may be required to wait for lookup to complete at this point */ if (!fscache_defer_lookup) { - _debug("non-deferred lookup %p", &cookie->flags); wait_on_bit(&cookie->flags, FSCACHE_COOKIE_LOOKING_UP, TASK_UNINTERRUPTIBLE); - _debug("complete"); if (test_bit(FSCACHE_COOKIE_UNAVAILABLE, &cookie->flags)) goto unavailable; } @@ -492,7 +490,7 @@ static int fscache_alloc_object(struct fscache_cache *cache, struct fscache_object *object; int ret; - _enter("%p,%p{%s}", cache, cookie, cookie->type_name); + _enter("%s,%x{%s}", cache->tag->name, cookie->debug_id, cookie->type_name); spin_lock(&cookie->lock); hlist_for_each_entry(object, &cookie->backing_objects, @@ -668,7 +666,7 @@ EXPORT_SYMBOL(__fscache_invalidate); */ void __fscache_wait_on_invalidate(struct fscache_cookie *cookie) { - _enter("%p", cookie); + _enter("%x", cookie->debug_id); wait_on_bit(&cookie->flags, FSCACHE_COOKIE_INVALIDATING, TASK_UNINTERRUPTIBLE); @@ -723,7 +721,7 @@ void __fscache_disable_cookie(struct fscache_cookie *cookie, struct fscache_object *object; bool awaken = false; - _enter("%p,%u", cookie, invalidate); + _enter("%x,%u", cookie->debug_id, invalidate); trace_fscache_disable(cookie); @@ -808,8 +806,8 @@ void __fscache_relinquish_cookie(struct fscache_cookie *cookie, return; } - _enter("%p{%s,%d},%d", - cookie, cookie->type_name, + _enter("%x{%s,%d},%d", + cookie->debug_id, cookie->type_name, atomic_read(&cookie->n_active), retire); trace_fscache_relinquish(cookie, retire); @@ -859,7 +857,7 @@ void fscache_cookie_put(struct fscache_cookie *cookie, struct fscache_cookie *parent; int usage; - _enter("%p", cookie); + _enter("%x", cookie->debug_id); do { usage = atomic_dec_return(&cookie->usage); diff --git a/fs/fscache/object.c b/fs/fscache/object.c index 5d50976bf379..efdd5309d88e 100644 --- a/fs/fscache/object.c +++ b/fs/fscache/object.c @@ -519,7 +519,6 @@ void fscache_object_lookup_negative(struct fscache_object *object) set_bit(FSCACHE_COOKIE_NO_DATA_YET, &cookie->flags); clear_bit(FSCACHE_COOKIE_UNAVAILABLE, &cookie->flags); - _debug("wake up lookup %p", &cookie->flags); clear_bit_unlock(FSCACHE_COOKIE_LOOKING_UP, &cookie->flags); wake_up_bit(&cookie->flags, FSCACHE_COOKIE_LOOKING_UP); }