From: Michal Hocko <mhocko@kernel.org> To: Andrew Morton <akpm@linux-foundation.org> Cc: Cristopher Lameter <clameter@sgi.com>, David Rientjes <rientjes@google.com>, Joonsoo Kim <js1304@gmail.com>, Pekka Enberg <penberg@kernel.org>, <linux-mm@kvack.org>, LKML <linux-kernel@vger.kernel.org>, Michal Hocko <mhocko@suse.com> Subject: [PATCH 1/2] slab: make GFP_SLAB_BUG_MASK information more human readable Date: Fri, 10 Jun 2016 10:43:19 +0200 [thread overview] Message-ID: <1465548200-11384-1-git-send-email-mhocko@kernel.org> (raw) From: Michal Hocko <mhocko@suse.com> printk offers %pGg for quite some time so let's use it to get a human readable list of invalid flags. The original output would be [ 429.191962] gfp: 2 after the change [ 429.191962] Unexpected gfp: 0x2 (__GFP_HIGHMEM) Signed-off-by: Michal Hocko <mhocko@suse.com> --- mm/slab.c | 3 ++- mm/slub.c | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/mm/slab.c b/mm/slab.c index 763096a247f6..03fb724d6e48 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -2686,7 +2686,8 @@ static struct page *cache_grow_begin(struct kmem_cache *cachep, * critical path in kmem_cache_alloc(). */ if (unlikely(flags & GFP_SLAB_BUG_MASK)) { - pr_emerg("gfp: %u\n", flags & GFP_SLAB_BUG_MASK); + gfp_t invalid_mask = flags & GFP_SLAB_BUG_MASK; + pr_emerg("Unexpected gfp: %#x (%pGg)\n", invalid_mask, &invalid_mask); BUG(); } local_flags = flags & (GFP_CONSTRAINT_MASK|GFP_RECLAIM_MASK); diff --git a/mm/slub.c b/mm/slub.c index cbf4e0e07d41..dd5a9eee7df5 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -1628,7 +1628,8 @@ static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node) static struct page *new_slab(struct kmem_cache *s, gfp_t flags, int node) { if (unlikely(flags & GFP_SLAB_BUG_MASK)) { - pr_emerg("gfp: %u\n", flags & GFP_SLAB_BUG_MASK); + gfp_t invalid_mask = flags & GFP_SLAB_BUG_MASK; + pr_emerg("Unexpected gfp: %#x (%pGg)\n", invalid_mask, &invalid_mask); BUG(); } -- 2.8.1
WARNING: multiple messages have this Message-ID (diff)
From: Michal Hocko <mhocko@kernel.org> To: Andrew Morton <akpm@linux-foundation.org> Cc: Cristopher Lameter <clameter@sgi.com>, David Rientjes <rientjes@google.com>, Joonsoo Kim <js1304@gmail.com>, Pekka Enberg <penberg@kernel.org>, linux-mm@kvack.org, LKML <linux-kernel@vger.kernel.org>, Michal Hocko <mhocko@suse.com> Subject: [PATCH 1/2] slab: make GFP_SLAB_BUG_MASK information more human readable Date: Fri, 10 Jun 2016 10:43:19 +0200 [thread overview] Message-ID: <1465548200-11384-1-git-send-email-mhocko@kernel.org> (raw) From: Michal Hocko <mhocko@suse.com> printk offers %pGg for quite some time so let's use it to get a human readable list of invalid flags. The original output would be [ 429.191962] gfp: 2 after the change [ 429.191962] Unexpected gfp: 0x2 (__GFP_HIGHMEM) Signed-off-by: Michal Hocko <mhocko@suse.com> --- mm/slab.c | 3 ++- mm/slub.c | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/mm/slab.c b/mm/slab.c index 763096a247f6..03fb724d6e48 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -2686,7 +2686,8 @@ static struct page *cache_grow_begin(struct kmem_cache *cachep, * critical path in kmem_cache_alloc(). */ if (unlikely(flags & GFP_SLAB_BUG_MASK)) { - pr_emerg("gfp: %u\n", flags & GFP_SLAB_BUG_MASK); + gfp_t invalid_mask = flags & GFP_SLAB_BUG_MASK; + pr_emerg("Unexpected gfp: %#x (%pGg)\n", invalid_mask, &invalid_mask); BUG(); } local_flags = flags & (GFP_CONSTRAINT_MASK|GFP_RECLAIM_MASK); diff --git a/mm/slub.c b/mm/slub.c index cbf4e0e07d41..dd5a9eee7df5 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -1628,7 +1628,8 @@ static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node) static struct page *new_slab(struct kmem_cache *s, gfp_t flags, int node) { if (unlikely(flags & GFP_SLAB_BUG_MASK)) { - pr_emerg("gfp: %u\n", flags & GFP_SLAB_BUG_MASK); + gfp_t invalid_mask = flags & GFP_SLAB_BUG_MASK; + pr_emerg("Unexpected gfp: %#x (%pGg)\n", invalid_mask, &invalid_mask); BUG(); } -- 2.8.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next reply other threads:[~2016-06-10 8:43 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-06-10 8:43 Michal Hocko [this message] 2016-06-10 8:43 ` [PATCH 1/2] slab: make GFP_SLAB_BUG_MASK information more human readable Michal Hocko 2016-06-10 8:43 ` [PATCH 2/2] slab: do not panic on invalid gfp_mask Michal Hocko 2016-06-10 8:43 ` Michal Hocko
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