From: Oscar Salvador <osalvador@suse.de>
To: akpm@linux-foundation.org
Cc: mhocko@suse.com, dan.j.williams@intel.com,
pasha.tatashin@soleen.com, Jonathan.Cameron@huawei.com,
david@redhat.com, anshuman.khandual@arm.com, vbabka@suse.cz,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Oscar Salvador <osalvador@suse.de>
Subject: [PATCH v2 1/5] drivers/base/memory: Remove unneeded check in remove_memory_block_devices
Date: Tue, 25 Jun 2019 09:52:23 +0200 [thread overview]
Message-ID: <20190625075227.15193-2-osalvador@suse.de> (raw)
In-Reply-To: <20190625075227.15193-1-osalvador@suse.de>
remove_memory_block_devices() checks for the range to be aligned
to memory_block_size_bytes, which is our current memory block size,
and WARNs_ON and bails out if it is not.
This is the right to do, but we do already do that in try_remove_memory(),
where remove_memory_block_devices() gets called from, and we even are
more strict in try_remove_memory, since we directly BUG_ON in case the range
is not properly aligned.
Since remove_memory_block_devices() is only called from try_remove_memory(),
we can safely drop the check here.
To be honest, I am not sure if we should kill the system in case we cannot
remove memory.
I tend to think that WARN_ON and return and error is better.
Signed-off-by: Oscar Salvador <osalvador@suse.de>
---
drivers/base/memory.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 826dd76f662e..07ba731beb42 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -771,10 +771,6 @@ void remove_memory_block_devices(unsigned long start, unsigned long size)
struct memory_block *mem;
int block_id;
- if (WARN_ON_ONCE(!IS_ALIGNED(start, memory_block_size_bytes()) ||
- !IS_ALIGNED(size, memory_block_size_bytes())))
- return;
-
mutex_lock(&mem_sysfs_mutex);
for (block_id = start_block_id; block_id != end_block_id; block_id++) {
mem = find_memory_block_by_id(block_id, NULL);
--
2.12.3
next prev parent reply other threads:[~2019-06-25 7:53 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-25 7:52 [PATCH v2 0/5] Allocate memmap from hotadded memory Oscar Salvador
2019-06-25 7:52 ` Oscar Salvador [this message]
2019-06-25 8:01 ` [PATCH v2 1/5] drivers/base/memory: Remove unneeded check in remove_memory_block_devices David Hildenbrand
2019-06-25 8:03 ` David Hildenbrand
2019-06-25 8:09 ` Oscar Salvador
2019-06-25 8:27 ` David Hildenbrand
2019-06-25 7:52 ` [PATCH v2 2/5] mm,memory_hotplug: Introduce MHP_VMEMMAP_FLAGS Oscar Salvador
2019-06-25 8:31 ` David Hildenbrand
2019-07-24 20:11 ` Dan Williams
2019-07-24 21:36 ` osalvador
2019-07-25 9:27 ` Oscar Salvador
2019-07-25 9:30 ` David Hildenbrand
2019-07-25 9:40 ` Oscar Salvador
2019-07-25 10:04 ` David Hildenbrand
2019-07-25 10:13 ` Oscar Salvador
2019-07-25 10:15 ` David Hildenbrand
2019-06-25 7:52 ` [PATCH v2 3/5] mm,memory_hotplug: Introduce Vmemmap page helpers Oscar Salvador
2019-06-25 10:28 ` David Hildenbrand
2019-06-26 9:48 ` Oscar Salvador
2019-06-25 7:52 ` [PATCH v2 4/5] mm,memory_hotplug: allocate memmap from the added memory range for sparse-vmemmap Oscar Salvador
2019-06-25 8:49 ` David Hildenbrand
2019-06-26 8:13 ` Oscar Salvador
2019-06-26 8:15 ` David Hildenbrand
2019-06-26 8:17 ` Anshuman Khandual
2019-06-26 8:28 ` Oscar Salvador
2019-07-24 21:49 ` Dan Williams
2019-06-25 7:52 ` [PATCH v2 5/5] mm,memory_hotplug: Allow userspace to enable/disable vmemmap Oscar Salvador
2019-06-25 8:25 ` [PATCH v2 0/5] Allocate memmap from hotadded memory David Hildenbrand
2019-06-25 8:33 ` David Hildenbrand
2019-06-26 8:03 ` Oscar Salvador
2019-06-26 8:11 ` David Hildenbrand
2019-06-26 8:15 ` Oscar Salvador
2019-06-26 8:27 ` Oscar Salvador
2019-06-26 8:37 ` David Hildenbrand
2019-06-26 8:28 ` David Hildenbrand
2019-07-02 6:42 ` Rashmica Gupta
2019-07-02 7:48 ` Oscar Salvador
2019-07-02 8:52 ` Rashmica Gupta
2019-07-10 1:14 ` Rashmica Gupta
2019-07-31 12:08 ` Michal Hocko
2019-07-31 23:06 ` Rashmica Gupta
2019-08-01 7:17 ` Michal Hocko
2019-08-01 7:18 ` David Hildenbrand
2019-08-01 7:24 ` Michal Hocko
2019-08-01 7:26 ` David Hildenbrand
2019-08-01 7:31 ` David Hildenbrand
2019-08-01 7:39 ` Michal Hocko
2019-08-01 7:48 ` Michal Hocko
2019-08-01 9:18 ` David Hildenbrand
2019-08-01 7:34 ` Michal Hocko
2019-08-01 7:50 ` David Hildenbrand
2019-08-01 8:04 ` Michal Hocko
2019-07-16 12:28 ` David Hildenbrand
2019-07-29 5:42 ` Rashmica Gupta
2019-07-29 8:06 ` David Hildenbrand
2019-07-30 7:08 ` Rashmica Gupta
2019-07-31 2:21 ` Rashmica Gupta
2019-07-31 9:39 ` David Hildenbrand
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