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Date: Wed, 19 Mar 2014 08:28:55 -0700
From: Greg KH <gregkh@...uxfoundation.org>
To: Daeseok Youn <daeseok.youn@...il.com>
Cc: devel@...verdev.osuosl.org, sparmaintainer@...sys.com,
linux-kernel@...r.kernel.org, benjamin.romer@...sys.com,
david.kershner@...sys.com
Subject: Re: [PATCH] staging: unisys: replace kzalloc/kfree with
UISMALLOC/UISFREE
On Wed, Mar 19, 2014 at 04:58:52PM +0900, Daeseok Youn wrote:
>
> It doesn't need to trace status of buffer when buffers are
> allocated/deallocated. So stuff of tracing memory status
> are removed. And also UISMALLOC/UISFREE macro are removed
> completetly. just use kzalloc/kfree.
>
> Signed-off-by: Daeseok Youn <daeseok.youn@...il.com>
> ---
> drivers/staging/unisys/include/uisutils.h | 6 --
> drivers/staging/unisys/uislib/uislib.c | 109 +++-------------------------
> drivers/staging/unisys/uislib/uisutils.c | 5 +-
> 3 files changed, 14 insertions(+), 106 deletions(-)
>
> diff --git a/drivers/staging/unisys/include/uisutils.h b/drivers/staging/unisys/include/uisutils.h
> index 81b5d9b..1c6d872 100644
> --- a/drivers/staging/unisys/include/uisutils.h
> +++ b/drivers/staging/unisys/include/uisutils.h
> @@ -340,12 +340,6 @@ static inline unsigned int Issue_VMCALL_FATAL_BYE_BYE(void)
> }
>
> #define UIS_DAEMONIZE(nam)
> -void *uislib_malloc(size_t siz, gfp_t gfp, U8 contiguous, char *fn, int ln);
> -#define UISMALLOC(siz, gfp) uislib_malloc(siz, gfp, 1, __FILE__, __LINE__)
> -#define UISVMALLOC(siz) uislib_malloc(siz, 0, 0, __FILE__, __LINE__)
> -void uislib_free(void *p, size_t siz, U8 contiguous, char *fn, int ln);
> -#define UISFREE(p, siz) uislib_free(p, siz, 1, __FILE__, __LINE__)
> -#define UISVFREE(p, siz) uislib_free(p, siz, 0, __FILE__, __LINE__)
> void *uislib_cache_alloc(struct kmem_cache *cur_pool, char *fn, int ln);
> #define UISCACHEALLOC(cur_pool) uislib_cache_alloc(cur_pool, __FILE__, __LINE__)
> void uislib_cache_free(struct kmem_cache *cur_pool, void *p, char *fn, int ln);
> diff --git a/drivers/staging/unisys/uislib/uislib.c b/drivers/staging/unisys/uislib/uislib.c
> index 1737f3a..c0eaa15 100644
> --- a/drivers/staging/unisys/uislib/uislib.c
> +++ b/drivers/staging/unisys/uislib/uislib.c
> @@ -316,7 +316,7 @@ create_bus(CONTROLVM_MESSAGE *msg, char *buf)
> size =
> sizeof(struct bus_info) +
> (deviceCount * sizeof(struct device_info *));
> - bus = UISMALLOC(size, GFP_ATOMIC);
> + bus = kzalloc(size, GFP_ATOMIC | __GFP_NORETRY);
All of the crazy __GFP_NORETRY stuff can be removed, no driver should
ever be using that.
> if (!bus) {
> LOGERR("CONTROLVM_BUS_CREATE Failed: kmalloc for bus failed.\n");
> POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, busNo,
> @@ -324,8 +324,6 @@ create_bus(CONTROLVM_MESSAGE *msg, char *buf)
> return CONTROLVM_RESP_ERROR_KMALLOC_FAILED;
> }
>
> - memset(bus, 0, size);
> -
> /* Currently by default, the bus Number is the GuestHandle.
> * Configure Bus message can override this.
> */
> @@ -359,7 +357,7 @@ create_bus(CONTROLVM_MESSAGE *msg, char *buf)
> bus->busNo);
> POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus->busNo,
> POSTCODE_SEVERITY_ERR);
> - UISFREE(bus, size);
> + kfree(bus);
> return CONTROLVM_RESP_ERROR_ALREADY_DONE;
> }
> if ((msg->cmd.createBus.channelAddr != 0)
> @@ -380,14 +378,14 @@ create_bus(CONTROLVM_MESSAGE *msg, char *buf)
> cmd.add_vbus.busTypeGuid = msg->cmd.createBus.busDataTypeGuid;
> cmd.add_vbus.busInstGuid = msg->cmd.createBus.busInstGuid;
> if (!VirtControlChanFunc) {
> - UISFREE(bus, size);
> + kfree(bus);
> LOGERR("CONTROLVM_BUS_CREATE Failed: virtpci callback not registered.");
> POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus->busNo,
> POSTCODE_SEVERITY_ERR);
> return CONTROLVM_RESP_ERROR_VIRTPCI_DRIVER_FAILURE;
> }
> if (!VirtControlChanFunc(&cmd)) {
> - UISFREE(bus, size);
> + kfree(bus);
> LOGERR("CONTROLVM_BUS_CREATE Failed: virtpci GUEST_ADD_VBUS returned error.");
> POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus->busNo,
> POSTCODE_SEVERITY_ERR);
> @@ -485,9 +483,7 @@ destroy_bus(CONTROLVM_MESSAGE *msg, char *buf)
> bus->pBusChannel = NULL;
> }
>
> - UISFREE(bus,
> - sizeof(struct bus_info) +
> - (bus->deviceCount * sizeof(struct device_info *)));
> + kfree(bus);
> return CONTROLVM_RESP_SUCCESS;
> }
>
> @@ -507,7 +503,7 @@ create_device(CONTROLVM_MESSAGE *msg, char *buf)
> POSTCODE_LINUX_4(DEVICE_CREATE_ENTRY_PC, devNo, busNo,
> POSTCODE_SEVERITY_INFO);
>
> - dev = UISMALLOC(sizeof(struct device_info), GFP_ATOMIC);
> + dev = kzalloc(sizeof(struct device_info), GFP_ATOMIC | __GFP_NORETRY);
> if (!dev) {
> LOGERR("CONTROLVM_DEVICE_CREATE Failed: kmalloc for dev failed.\n");
> POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, devNo, busNo,
> @@ -515,7 +511,6 @@ create_device(CONTROLVM_MESSAGE *msg, char *buf)
> return CONTROLVM_RESP_ERROR_KMALLOC_FAILED;
> }
>
> - memset(dev, 0, sizeof(struct device_info));
> dev->channelTypeGuid = msg->cmd.createDevice.dataTypeGuid;
> dev->intr = msg->cmd.createDevice.intr;
> dev->channelAddr = msg->cmd.createDevice.channelAddr;
> @@ -688,7 +683,7 @@ Away:
> dev->chanptr = NULL;
> }
>
> - UISFREE(dev, sizeof(struct device_info));
> + kfree(dev);
> return result;
> }
>
> @@ -917,7 +912,7 @@ destroy_device(CONTROLVM_MESSAGE *msg, char *buf)
> LOGINF("destroy_device, doing iounmap");
> uislib_iounmap(dev->chanptr);
> }
> - UISFREE(dev, sizeof(struct device_info));
> + kfree(dev);
> bus->device[devNo] = NULL;
> break;
> }
> @@ -1343,69 +1338,7 @@ uislib_client_delete_vnic(U32 busNo)
> return 1;
> }
> EXPORT_SYMBOL_GPL(uislib_client_delete_vnic);
> -
> - /* end client_delete_vnic */
> -
> -static atomic_t Malloc_BytesInUse = ATOMIC_INIT(0);
> -static atomic_t Malloc_BuffersInUse = ATOMIC_INIT(0);
> -static atomic_t Malloc_FailuresAlloc = ATOMIC_INIT(0);
> -static atomic_t Malloc_FailuresFree = ATOMIC_INIT(0);
> -static atomic_t Malloc_TotalMallocs = ATOMIC_INIT(0);
> -static atomic_t Malloc_TotalFrees = ATOMIC_INIT(0);
> -
> -void *
> -uislib_malloc(size_t siz, gfp_t gfp, U8 contiguous, char *fn, int ln)
> -{
> - void *p = NULL;
> -
> - if (contiguous == 0) {
> - /* Allocate non-contiguous memory, such as in the
> - * add_vnic and add_vhba methods where we are rebooting
> - * the guest, for example. Otherwise the contiguous
> - * memory allocation attempt results in an
> - * out-of-memory crash in the IOVM...
> - */
> - p = vmalloc(siz);
> - } else {
> - /* __GFP_NORETRY means "ok to fail", meaning kmalloc()
> - * can return NULL. If you do NOT specify
> - * __GFP_NORETRY, Linux will go to extreme measures to
> - * get memory for you (like, invoke oom killer), which
> - * will probably cripple the system.
> - */
> - p = kmalloc(siz, gfp | __GFP_NORETRY);
> - }
> - if (p == NULL) {
> - LOGERR("uislib_malloc failed to alloc %d bytes @%s:%d",
> - (int) siz, fn, ln);
> - atomic_inc(&Malloc_FailuresAlloc);
> - return NULL;
> - }
> - atomic_add((int) (siz), &Malloc_BytesInUse);
> - atomic_inc(&Malloc_BuffersInUse);
> - atomic_inc(&Malloc_TotalMallocs); /* will eventually overflow */
> - return p;
> -}
> -EXPORT_SYMBOL_GPL(uislib_malloc);
> -
> -void
> -uislib_free(void *p, size_t siz, U8 contiguous, char *fn, int ln)
> -{
> - if (p == NULL) {
> - LOGERR("uislib_free NULL pointer @%s:%d", fn, ln);
> - atomic_inc(&Malloc_FailuresFree);
> - return;
> - }
> -
> - if (contiguous == 0)
> - vfree(p);
> - else
> - kfree(p);
> - atomic_sub((int) (siz), &Malloc_BytesInUse);
> - atomic_dec(&Malloc_BuffersInUse);
> - atomic_inc(&Malloc_TotalFrees); /* will eventually overflow */
> -}
> -EXPORT_SYMBOL_GPL(uislib_free);
> +/* end client_delete_vnic */
>
> void *
> uislib_cache_alloc(struct kmem_cache *cur_pool, char *fn, int ln)
> @@ -1605,24 +1538,6 @@ info_proc_read_helper(char **buff, int *buff_len)
> }
> read_unlock(&BusListLock);
>
> - if (PLINE("Malloc bytes in use: %d\n",
> - atomic_read(&Malloc_BytesInUse)) < 0)
> - goto err_done;
> - if (PLINE("Malloc buffers in use: %d\n",
> - atomic_read(&Malloc_BuffersInUse)) < 0)
> - goto err_done;
> - if (PLINE("Malloc allocation failures: %d\n",
> - atomic_read(&Malloc_FailuresAlloc)) < 0)
> - goto err_done;
> - if (PLINE("Malloc free failures: %d\n",
> - atomic_read(&Malloc_FailuresFree)) < 0)
> - goto err_done;
> - if (PLINE("Malloc total mallocs: %u (may overflow)\n",
> - (unsigned) atomic_read(&Malloc_TotalMallocs)) < 0)
> - goto err_done;
> - if (PLINE("Malloc total frees: %u (may overflow)\n",
> - (unsigned) atomic_read(&Malloc_TotalFrees)) < 0)
> - goto err_done;
> if (PLINE("UisUtils_Registered_Services: %d\n",
> atomic_read(&UisUtils_Registered_Services)) < 0)
> goto err_done;
> @@ -1655,7 +1570,7 @@ info_proc_read(struct file *file, char __user *buf, size_t len, loff_t *offset)
> /* *start = buf; */
> if (ProcReadBuffer == NULL) {
> DBGINF("ProcReadBuffer == NULL; allocating buffer.\n.");
> - ProcReadBuffer = UISVMALLOC(PROC_READ_BUFFER_SIZE);
> + ProcReadBuffer = vmalloc(PROC_READ_BUFFER_SIZE);
>
> if (ProcReadBuffer == NULL) {
> LOGERR("failed to allocate buffer to provide proc data.\n");
> @@ -1691,7 +1606,7 @@ platformnumber_proc_read(struct file *file, char __user *buf,
> if (pos > 0 || !len)
> return 0;
>
> - vbuf = kzalloc(len, GFP_KERNEL);
> + vbuf = kzalloc(len, GFP_KERNEL | __GFP_NORETRY);
Why did you change this line?
thanks,
greg k-h
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