diff options
| author | Alexander Shishkin <alexander.shishkin@linux.intel.com> | 2018-05-24 11:27:26 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-06-06 16:44:38 +0200 |
| commit | 994347096a53d69ce5c9791627a9b5334d77c477 (patch) | |
| tree | c26d01a3d268314eb434fee3baa173c4903590bf | |
| parent | 3875d1b83b19c75e2db2c25ef3dcd78e3d2c1d5f (diff) | |
stm class: Use vmalloc for the master map
commit b5e2ced9bf81393034072dd4d372f6b430bc1f0a upstream.
Fengguang is running into a warning from the buddy allocator:
> swapper/0: page allocation failure: order:9, mode:0x14040c0(GFP_KERNEL|__GFP_COMP), nodemask=(null)
> CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.17.0-rc1 #262
> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
> Call Trace:
...
> __kmalloc+0x14b/0x180: ____cache_alloc at mm/slab.c:3127
> stm_register_device+0xf3/0x5c0: stm_register_device at drivers/hwtracing/stm/core.c:695
...
Which is basically a result of the stm class trying to allocate ~512kB
for the dummy_stm with its default parameters. There's no reason, however,
for it not to be vmalloc()ed instead, which is what this patch does.
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
CC: stable@vger.kernel.org # v4.4+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/hwtracing/stm/core.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/hwtracing/stm/core.c b/drivers/hwtracing/stm/core.c index 877a0ed76abf..b956305c1730 100644 --- a/drivers/hwtracing/stm/core.c +++ b/drivers/hwtracing/stm/core.c @@ -682,7 +682,7 @@ static void stm_device_release(struct device *dev) { struct stm_device *stm = to_stm_device(dev); - kfree(stm); + vfree(stm); } int stm_register_device(struct device *parent, struct stm_data *stm_data, @@ -699,7 +699,7 @@ int stm_register_device(struct device *parent, struct stm_data *stm_data, return -EINVAL; nmasters = stm_data->sw_end - stm_data->sw_start + 1; - stm = kzalloc(sizeof(*stm) + nmasters * sizeof(void *), GFP_KERNEL); + stm = vzalloc(sizeof(*stm) + nmasters * sizeof(void *)); if (!stm) return -ENOMEM; @@ -752,7 +752,7 @@ err_device: /* matches device_initialize() above */ put_device(&stm->dev); err_free: - kfree(stm); + vfree(stm); return err; } |