* RE: [PATCH] SCSI:STORVSC Use SCSI layer to allocate memory for per-command device request data
2014-12-30 4:05 [PATCH] SCSI:STORVSC Use SCSI layer to allocate memory for per-command device request data Christoph Hellwig
@ 2014-12-30 3:36 ` KY Srinivasan
2015-03-10 11:42 ` Olaf Hering
1 sibling, 0 replies; 5+ messages in thread
From: KY Srinivasan @ 2014-12-30 3:36 UTC (permalink / raw)
To: Christoph Hellwig, Haiyang Zhang, JBottomley
Cc: linux-scsi, devel, linux-kernel, Long Li
> -----Original Message-----
> From: Christoph Hellwig [mailto:hch@lst.de]
> Sent: Monday, December 29, 2014 8:05 PM
> To: KY Srinivasan; Haiyang Zhang; JBottomley@parallels.com
> Cc: linux-scsi@vger.kernel.org; devel@linuxdriverproject.org; linux-
> kernel@vger.kernel.org; Long Li; Christoph Hellwig
> Subject: [PATCH] SCSI:STORVSC Use SCSI layer to allocate memory for per-
> command device request data
>
> STORVSC uses its own momory pool to manage device request data.
> However, SCSI layer already has a mechanisim for allocating additional
> memory for each command issued to device driver. This patch removes the
> memory pool in STORVSC and makes it use SCSI layer to allocate memory for
> device request data.
>
> Reviewed-by: Long Li <longli@microsoft.com>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
Thanks Christoph.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
> ---
> drivers/scsi/storvsc_drv.c | 119 +++------------------------------------------
> 1 file changed, 8 insertions(+), 111 deletions(-)
>
> diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c index
> 4cff0dd..14ee98e 100644
> --- a/drivers/scsi/storvsc_drv.c
> +++ b/drivers/scsi/storvsc_drv.c
> @@ -32,7 +32,6 @@
> #include <linux/module.h>
> #include <linux/device.h>
> #include <linux/hyperv.h>
> -#include <linux/mempool.h>
> #include <linux/blkdev.h>
> #include <scsi/scsi.h>
> #include <scsi/scsi_cmnd.h>
> @@ -309,14 +308,6 @@ enum storvsc_request_type {
> * This is the end of Protocol specific defines.
> */
>
> -
> -/*
> - * We setup a mempool to allocate request structures for this driver
> - * on a per-lun basis. The following define specifies the number of
> - * elements in the pool.
> - */
> -
> -#define STORVSC_MIN_BUF_NR 64
> static int storvsc_ringbuffer_size = (20 * PAGE_SIZE);
>
> module_param(storvsc_ringbuffer_size, int, S_IRUGO); @@ -346,7 +337,6
> @@ static void storvsc_on_channel_callback(void *context);
> #define STORVSC_IDE_MAX_CHANNELS 1
>
> struct storvsc_cmd_request {
> - struct list_head entry;
> struct scsi_cmnd *cmd;
>
> unsigned int bounce_sgl_count;
> @@ -357,7 +347,6 @@ struct storvsc_cmd_request {
> /* Synchronize the request/response if needed */
> struct completion wait_event;
>
> - unsigned char *sense_buffer;
> struct hv_multipage_buffer data_buffer;
> struct vstor_packet vstor_packet;
> };
> @@ -389,11 +378,6 @@ struct storvsc_device {
> struct storvsc_cmd_request reset_request; };
>
> -struct stor_mem_pools {
> - struct kmem_cache *request_pool;
> - mempool_t *request_mempool;
> -};
> -
> struct hv_host_device {
> struct hv_device *dev;
> unsigned int port;
> @@ -1070,10 +1054,8 @@ static void storvsc_command_completion(struct
> storvsc_cmd_request *cmd_request) {
> struct scsi_cmnd *scmnd = cmd_request->cmd;
> struct hv_host_device *host_dev = shost_priv(scmnd->device-
> >host);
> - void (*scsi_done_fn)(struct scsi_cmnd *);
> struct scsi_sense_hdr sense_hdr;
> struct vmscsi_request *vm_srb;
> - struct stor_mem_pools *memp = scmnd->device->hostdata;
> struct Scsi_Host *host;
> struct storvsc_device *stor_dev;
> struct hv_device *dev = host_dev->dev; @@ -1109,14 +1091,7 @@
> static void storvsc_command_completion(struct storvsc_cmd_request
> *cmd_request)
> cmd_request->data_buffer.len -
> vm_srb->data_transfer_length);
>
> - scsi_done_fn = scmnd->scsi_done;
> -
> - scmnd->host_scribble = NULL;
> - scmnd->scsi_done = NULL;
> -
> - scsi_done_fn(scmnd);
> -
> - mempool_free(cmd_request, memp->request_mempool);
> + scmnd->scsi_done(scmnd);
> }
>
> static void storvsc_on_io_completion(struct hv_device *device, @@ -1160,7
> +1135,7 @@ static void storvsc_on_io_completion(struct hv_device *device,
> SRB_STATUS_AUTOSENSE_VALID) {
> /* autosense data available */
>
> - memcpy(request->sense_buffer,
> + memcpy(request->cmd->sense_buffer,
> vstor_packet->vm_srb.sense_data,
> vstor_packet->vm_srb.sense_info_length);
>
> @@ -1378,55 +1353,6 @@ static int storvsc_do_io(struct hv_device *device,
> return ret;
> }
>
> -static int storvsc_device_alloc(struct scsi_device *sdevice) -{
> - struct stor_mem_pools *memp;
> - int number = STORVSC_MIN_BUF_NR;
> -
> - memp = kzalloc(sizeof(struct stor_mem_pools), GFP_KERNEL);
> - if (!memp)
> - return -ENOMEM;
> -
> - memp->request_pool =
> - kmem_cache_create(dev_name(&sdevice->sdev_dev),
> - sizeof(struct storvsc_cmd_request), 0,
> - SLAB_HWCACHE_ALIGN, NULL);
> -
> - if (!memp->request_pool)
> - goto err0;
> -
> - memp->request_mempool = mempool_create(number,
> mempool_alloc_slab,
> - mempool_free_slab,
> - memp->request_pool);
> -
> - if (!memp->request_mempool)
> - goto err1;
> -
> - sdevice->hostdata = memp;
> -
> - return 0;
> -
> -err1:
> - kmem_cache_destroy(memp->request_pool);
> -
> -err0:
> - kfree(memp);
> - return -ENOMEM;
> -}
> -
> -static void storvsc_device_destroy(struct scsi_device *sdevice) -{
> - struct stor_mem_pools *memp = sdevice->hostdata;
> -
> - if (!memp)
> - return;
> -
> - mempool_destroy(memp->request_mempool);
> - kmem_cache_destroy(memp->request_pool);
> - kfree(memp);
> - sdevice->hostdata = NULL;
> -}
> -
> static int storvsc_device_configure(struct scsi_device *sdevice) {
> scsi_change_queue_depth(sdevice, STORVSC_MAX_IO_REQUESTS);
> @@ -1561,13 +1487,11 @@ static int storvsc_queuecommand(struct
> Scsi_Host *host, struct scsi_cmnd *scmnd)
> int ret;
> struct hv_host_device *host_dev = shost_priv(host);
> struct hv_device *dev = host_dev->dev;
> - struct storvsc_cmd_request *cmd_request;
> - unsigned int request_size = 0;
> + struct storvsc_cmd_request *cmd_request = scsi_cmd_priv(scmnd);
> int i;
> struct scatterlist *sgl;
> unsigned int sg_count = 0;
> struct vmscsi_request *vm_srb;
> - struct stor_mem_pools *memp = scmnd->device->hostdata;
>
> if (vmstor_current_major <= VMSTOR_WIN8_MAJOR) {
> /*
> @@ -1584,25 +1508,9 @@ static int storvsc_queuecommand(struct Scsi_Host
> *host, struct scsi_cmnd *scmnd)
> }
> }
>
> - request_size = sizeof(struct storvsc_cmd_request);
> -
> - cmd_request = mempool_alloc(memp->request_mempool,
> - GFP_ATOMIC);
> -
> - /*
> - * We might be invoked in an interrupt context; hence
> - * mempool_alloc() can fail.
> - */
> - if (!cmd_request)
> - return SCSI_MLQUEUE_DEVICE_BUSY;
> -
> - memset(cmd_request, 0, sizeof(struct storvsc_cmd_request));
> -
> /* Setup the cmd request */
> cmd_request->cmd = scmnd;
>
> - scmnd->host_scribble = (unsigned char *)cmd_request;
> -
> vm_srb = &cmd_request->vstor_packet.vm_srb;
> vm_srb->win8_extension.time_out_value = 60;
>
> @@ -1637,9 +1545,6 @@ static int storvsc_queuecommand(struct Scsi_Host
> *host, struct scsi_cmnd *scmnd)
>
> memcpy(vm_srb->cdb, scmnd->cmnd, vm_srb->cdb_length);
>
> - cmd_request->sense_buffer = scmnd->sense_buffer;
> -
> -
> cmd_request->data_buffer.len = scsi_bufflen(scmnd);
> if (scsi_sg_count(scmnd)) {
> sgl = (struct scatterlist *)scsi_sglist(scmnd); @@ -1651,10
> +1556,8 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct
> scsi_cmnd *scmnd)
> create_bounce_buffer(sgl,
> scsi_sg_count(scmnd),
> scsi_bufflen(scmnd),
> vm_srb->data_in);
> - if (!cmd_request->bounce_sgl) {
> - ret = SCSI_MLQUEUE_HOST_BUSY;
> - goto queue_error;
> - }
> + if (!cmd_request->bounce_sgl)
> + return SCSI_MLQUEUE_HOST_BUSY;
>
> cmd_request->bounce_sgl_count =
> ALIGN(scsi_bufflen(scmnd), PAGE_SIZE) >>
> @@ -1692,27 +1595,21 @@ static int storvsc_queuecommand(struct
> Scsi_Host *host, struct scsi_cmnd *scmnd)
> destroy_bounce_buffer(cmd_request->bounce_sgl,
> cmd_request->bounce_sgl_count);
>
> - ret = SCSI_MLQUEUE_DEVICE_BUSY;
> - goto queue_error;
> + return SCSI_MLQUEUE_DEVICE_BUSY;
> }
>
> return 0;
> -
> -queue_error:
> - mempool_free(cmd_request, memp->request_mempool);
> - scmnd->host_scribble = NULL;
> - return ret;
> }
>
> static struct scsi_host_template scsi_driver = {
> .module = THIS_MODULE,
> .name = "storvsc_host_t",
> + .cmd_size = sizeof(struct storvsc_cmd_request),
> .bios_param = storvsc_get_chs,
> .queuecommand = storvsc_queuecommand,
> .eh_host_reset_handler = storvsc_host_reset_handler,
> + .proc_name = "storvsc_host",
> .eh_timed_out = storvsc_eh_timed_out,
> - .slave_alloc = storvsc_device_alloc,
> - .slave_destroy = storvsc_device_destroy,
> .slave_configure = storvsc_device_configure,
> .cmd_per_lun = 255,
> .can_queue =
> STORVSC_MAX_IO_REQUESTS*STORVSC_MAX_TARGETS,
> --
> 2.1.0
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH] SCSI:STORVSC Use SCSI layer to allocate memory for per-command device request data
@ 2014-12-30 4:05 Christoph Hellwig
2014-12-30 3:36 ` KY Srinivasan
2015-03-10 11:42 ` Olaf Hering
0 siblings, 2 replies; 5+ messages in thread
From: Christoph Hellwig @ 2014-12-30 4:05 UTC (permalink / raw)
To: kys, haiyangz, JBottomley
Cc: linux-scsi, devel, linux-kernel, longli, Christoph Hellwig
STORVSC uses its own momory pool to manage device request data. However, SCSI layer already has a mechanisim for allocating additional memory for each command issued to device driver. This patch removes the memory pool in STORVSC and makes it use SCSI layer to allocate memory for device request data.
Reviewed-by: Long Li <longli@microsoft.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/scsi/storvsc_drv.c | 119 +++------------------------------------------
1 file changed, 8 insertions(+), 111 deletions(-)
diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index 4cff0dd..14ee98e 100644
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -32,7 +32,6 @@
#include <linux/module.h>
#include <linux/device.h>
#include <linux/hyperv.h>
-#include <linux/mempool.h>
#include <linux/blkdev.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
@@ -309,14 +308,6 @@ enum storvsc_request_type {
* This is the end of Protocol specific defines.
*/
-
-/*
- * We setup a mempool to allocate request structures for this driver
- * on a per-lun basis. The following define specifies the number of
- * elements in the pool.
- */
-
-#define STORVSC_MIN_BUF_NR 64
static int storvsc_ringbuffer_size = (20 * PAGE_SIZE);
module_param(storvsc_ringbuffer_size, int, S_IRUGO);
@@ -346,7 +337,6 @@ static void storvsc_on_channel_callback(void *context);
#define STORVSC_IDE_MAX_CHANNELS 1
struct storvsc_cmd_request {
- struct list_head entry;
struct scsi_cmnd *cmd;
unsigned int bounce_sgl_count;
@@ -357,7 +347,6 @@ struct storvsc_cmd_request {
/* Synchronize the request/response if needed */
struct completion wait_event;
- unsigned char *sense_buffer;
struct hv_multipage_buffer data_buffer;
struct vstor_packet vstor_packet;
};
@@ -389,11 +378,6 @@ struct storvsc_device {
struct storvsc_cmd_request reset_request;
};
-struct stor_mem_pools {
- struct kmem_cache *request_pool;
- mempool_t *request_mempool;
-};
-
struct hv_host_device {
struct hv_device *dev;
unsigned int port;
@@ -1070,10 +1054,8 @@ static void storvsc_command_completion(struct storvsc_cmd_request *cmd_request)
{
struct scsi_cmnd *scmnd = cmd_request->cmd;
struct hv_host_device *host_dev = shost_priv(scmnd->device->host);
- void (*scsi_done_fn)(struct scsi_cmnd *);
struct scsi_sense_hdr sense_hdr;
struct vmscsi_request *vm_srb;
- struct stor_mem_pools *memp = scmnd->device->hostdata;
struct Scsi_Host *host;
struct storvsc_device *stor_dev;
struct hv_device *dev = host_dev->dev;
@@ -1109,14 +1091,7 @@ static void storvsc_command_completion(struct storvsc_cmd_request *cmd_request)
cmd_request->data_buffer.len -
vm_srb->data_transfer_length);
- scsi_done_fn = scmnd->scsi_done;
-
- scmnd->host_scribble = NULL;
- scmnd->scsi_done = NULL;
-
- scsi_done_fn(scmnd);
-
- mempool_free(cmd_request, memp->request_mempool);
+ scmnd->scsi_done(scmnd);
}
static void storvsc_on_io_completion(struct hv_device *device,
@@ -1160,7 +1135,7 @@ static void storvsc_on_io_completion(struct hv_device *device,
SRB_STATUS_AUTOSENSE_VALID) {
/* autosense data available */
- memcpy(request->sense_buffer,
+ memcpy(request->cmd->sense_buffer,
vstor_packet->vm_srb.sense_data,
vstor_packet->vm_srb.sense_info_length);
@@ -1378,55 +1353,6 @@ static int storvsc_do_io(struct hv_device *device,
return ret;
}
-static int storvsc_device_alloc(struct scsi_device *sdevice)
-{
- struct stor_mem_pools *memp;
- int number = STORVSC_MIN_BUF_NR;
-
- memp = kzalloc(sizeof(struct stor_mem_pools), GFP_KERNEL);
- if (!memp)
- return -ENOMEM;
-
- memp->request_pool =
- kmem_cache_create(dev_name(&sdevice->sdev_dev),
- sizeof(struct storvsc_cmd_request), 0,
- SLAB_HWCACHE_ALIGN, NULL);
-
- if (!memp->request_pool)
- goto err0;
-
- memp->request_mempool = mempool_create(number, mempool_alloc_slab,
- mempool_free_slab,
- memp->request_pool);
-
- if (!memp->request_mempool)
- goto err1;
-
- sdevice->hostdata = memp;
-
- return 0;
-
-err1:
- kmem_cache_destroy(memp->request_pool);
-
-err0:
- kfree(memp);
- return -ENOMEM;
-}
-
-static void storvsc_device_destroy(struct scsi_device *sdevice)
-{
- struct stor_mem_pools *memp = sdevice->hostdata;
-
- if (!memp)
- return;
-
- mempool_destroy(memp->request_mempool);
- kmem_cache_destroy(memp->request_pool);
- kfree(memp);
- sdevice->hostdata = NULL;
-}
-
static int storvsc_device_configure(struct scsi_device *sdevice)
{
scsi_change_queue_depth(sdevice, STORVSC_MAX_IO_REQUESTS);
@@ -1561,13 +1487,11 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd)
int ret;
struct hv_host_device *host_dev = shost_priv(host);
struct hv_device *dev = host_dev->dev;
- struct storvsc_cmd_request *cmd_request;
- unsigned int request_size = 0;
+ struct storvsc_cmd_request *cmd_request = scsi_cmd_priv(scmnd);
int i;
struct scatterlist *sgl;
unsigned int sg_count = 0;
struct vmscsi_request *vm_srb;
- struct stor_mem_pools *memp = scmnd->device->hostdata;
if (vmstor_current_major <= VMSTOR_WIN8_MAJOR) {
/*
@@ -1584,25 +1508,9 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd)
}
}
- request_size = sizeof(struct storvsc_cmd_request);
-
- cmd_request = mempool_alloc(memp->request_mempool,
- GFP_ATOMIC);
-
- /*
- * We might be invoked in an interrupt context; hence
- * mempool_alloc() can fail.
- */
- if (!cmd_request)
- return SCSI_MLQUEUE_DEVICE_BUSY;
-
- memset(cmd_request, 0, sizeof(struct storvsc_cmd_request));
-
/* Setup the cmd request */
cmd_request->cmd = scmnd;
- scmnd->host_scribble = (unsigned char *)cmd_request;
-
vm_srb = &cmd_request->vstor_packet.vm_srb;
vm_srb->win8_extension.time_out_value = 60;
@@ -1637,9 +1545,6 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd)
memcpy(vm_srb->cdb, scmnd->cmnd, vm_srb->cdb_length);
- cmd_request->sense_buffer = scmnd->sense_buffer;
-
-
cmd_request->data_buffer.len = scsi_bufflen(scmnd);
if (scsi_sg_count(scmnd)) {
sgl = (struct scatterlist *)scsi_sglist(scmnd);
@@ -1651,10 +1556,8 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd)
create_bounce_buffer(sgl, scsi_sg_count(scmnd),
scsi_bufflen(scmnd),
vm_srb->data_in);
- if (!cmd_request->bounce_sgl) {
- ret = SCSI_MLQUEUE_HOST_BUSY;
- goto queue_error;
- }
+ if (!cmd_request->bounce_sgl)
+ return SCSI_MLQUEUE_HOST_BUSY;
cmd_request->bounce_sgl_count =
ALIGN(scsi_bufflen(scmnd), PAGE_SIZE) >>
@@ -1692,27 +1595,21 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd)
destroy_bounce_buffer(cmd_request->bounce_sgl,
cmd_request->bounce_sgl_count);
- ret = SCSI_MLQUEUE_DEVICE_BUSY;
- goto queue_error;
+ return SCSI_MLQUEUE_DEVICE_BUSY;
}
return 0;
-
-queue_error:
- mempool_free(cmd_request, memp->request_mempool);
- scmnd->host_scribble = NULL;
- return ret;
}
static struct scsi_host_template scsi_driver = {
.module = THIS_MODULE,
.name = "storvsc_host_t",
+ .cmd_size = sizeof(struct storvsc_cmd_request),
.bios_param = storvsc_get_chs,
.queuecommand = storvsc_queuecommand,
.eh_host_reset_handler = storvsc_host_reset_handler,
+ .proc_name = "storvsc_host",
.eh_timed_out = storvsc_eh_timed_out,
- .slave_alloc = storvsc_device_alloc,
- .slave_destroy = storvsc_device_destroy,
.slave_configure = storvsc_device_configure,
.cmd_per_lun = 255,
.can_queue = STORVSC_MAX_IO_REQUESTS*STORVSC_MAX_TARGETS,
--
2.1.0
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH] SCSI:STORVSC Use SCSI layer to allocate memory for per-command device request data
2014-12-30 4:05 [PATCH] SCSI:STORVSC Use SCSI layer to allocate memory for per-command device request data Christoph Hellwig
2014-12-30 3:36 ` KY Srinivasan
@ 2015-03-10 11:42 ` Olaf Hering
2015-03-10 13:30 ` Christoph Hellwig
1 sibling, 1 reply; 5+ messages in thread
From: Olaf Hering @ 2015-03-10 11:42 UTC (permalink / raw)
To: Christoph Hellwig
Cc: kys, haiyangz, JBottomley, linux-scsi, devel, linux-kernel, longli
On Mon, Dec 29, Christoph Hellwig wrote:
> +++ b/drivers/scsi/storvsc_drv.c
> static struct scsi_host_template scsi_driver = {
> .module = THIS_MODULE,
> .name = "storvsc_host_t",
> + .cmd_size = sizeof(struct storvsc_cmd_request),
> .bios_param = storvsc_get_chs,
> .queuecommand = storvsc_queuecommand,
> .eh_host_reset_handler = storvsc_host_reset_handler,
> + .proc_name = "storvsc_host",
It would be nice to change .proc_name to KBUILD_MODNAME before v4.0 is
released. We carry a patch which adds this field. Of cource we can just
change the patch, but if code gets touched upstream anyway...
Olaf
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] SCSI:STORVSC Use SCSI layer to allocate memory for per-command device request data
2015-03-10 11:42 ` Olaf Hering
@ 2015-03-10 13:30 ` Christoph Hellwig
2015-03-10 14:53 ` Olaf Hering
0 siblings, 1 reply; 5+ messages in thread
From: Christoph Hellwig @ 2015-03-10 13:30 UTC (permalink / raw)
To: Olaf Hering
Cc: Christoph Hellwig, kys, haiyangz, JBottomley, linux-scsi, devel,
linux-kernel, longli
On Tue, Mar 10, 2015 at 12:42:33PM +0100, Olaf Hering wrote:
> It would be nice to change .proc_name to KBUILD_MODNAME before v4.0 is
> released. We carry a patch which adds this field. Of cource we can just
> change the patch, but if code gets touched upstream anyway...
Please send a patch. Would be nice if you had sent it long go insted of just
including it in a vendor tree..
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] SCSI:STORVSC Use SCSI layer to allocate memory for per-command device request data
2015-03-10 13:30 ` Christoph Hellwig
@ 2015-03-10 14:53 ` Olaf Hering
0 siblings, 0 replies; 5+ messages in thread
From: Olaf Hering @ 2015-03-10 14:53 UTC (permalink / raw)
To: Christoph Hellwig
Cc: kys, haiyangz, JBottomley, linux-scsi, devel, linux-kernel, longli
On Tue, Mar 10, Christoph Hellwig wrote:
> On Tue, Mar 10, 2015 at 12:42:33PM +0100, Olaf Hering wrote:
> > It would be nice to change .proc_name to KBUILD_MODNAME before v4.0 is
> > released. We carry a patch which adds this field. Of cource we can just
> > change the patch, but if code gets touched upstream anyway...
>
> Please send a patch. Would be nice if you had sent it long go insted of just
> including it in a vendor tree..
I was told .procname was dead, but since the patch adds it anyway it
should have a content thats in use (by us).
Olaf
^ permalink raw reply [flat|nested] 5+ messages in thread
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2014-12-30 4:05 [PATCH] SCSI:STORVSC Use SCSI layer to allocate memory for per-command device request data Christoph Hellwig
2014-12-30 3:36 ` KY Srinivasan
2015-03-10 11:42 ` Olaf Hering
2015-03-10 13:30 ` Christoph Hellwig
2015-03-10 14:53 ` Olaf Hering
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