From: Zoltan Kiss <zoltan.kiss@citrix.com>
To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/1] xen-blkback: Change statistics counter types to unsigned
Date: Mon, 11 Mar 2013 16:16:43 +0000 [thread overview]
Message-ID: <513E036B.5020001@citrix.com> (raw)
In-Reply-To: <20130308184301.GA31104@phenom.dumpdata.com>
[-- Attachment #1: Type: text/plain, Size: 4218 bytes --]
Done, just sent in in separate mail.
On 08/03/13 18:43, Konrad Rzeszutek Wilk wrote:
> On Tue, Mar 05, 2013 at 05:59:32PM +0000, Zoltan Kiss wrote:
>> These values shouldn't be negative, but after an overflow their value
>> can turn into negative, if they are signed. xentop can show bogus
>> values in this case.
>
> I get this during compilation:
>
> /home/konrad/linux/drivers/block/xen-blkback/xenbus.c: In function ‘show_oo_req’:
> /home/konrad/linux/drivers/block/xen-blkback/xenbus.c:233: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long long unsigned int’
> /home/konrad/linux/drivers/block/xen-blkback/xenbus.c: In function ‘show_rd_req’:
> /home/konrad/linux/drivers/block/xen-blkback/xenbus.c:234: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long long unsigned int’
> /home/konrad/linux/drivers/block/xen-blkback/xenbus.c: In function ‘show_wr_req’:
> /home/konrad/linux/drivers/block/xen-blkback/xenbus.c:235: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long long unsigned int’
> /home/konrad/linux/drivers/block/xen-blkback/xenbus.c: In function ‘show_f_req’:
> /home/konrad/linux/drivers/block/xen-blkback/xenbus.c:236: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long long unsigned int’
> /home/konrad/linux/drivers/block/xen-blkback/xenbus.c: In function ‘show_ds_req’:
> /home/konrad/linux/drivers/block/xen-blkback/xenbus.c:237: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long long unsigned int’
> /home/konrad/linux/drivers/block/xen-blkback/xenbus.c: In function ‘show_rd_sect’:
> /home/konrad/linux/drivers/block/xen-blkback/xenbus.c:238: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long long unsigned int’
> /home/konrad/linux/drivers/block/xen-blkback/xenbus.c: In function ‘show_wr_sect’:
> /home/konrad/linux/drivers/block/xen-blkback/xenbus.c:239: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long long unsigned int’
> CC block/bsg-lib.o
> CC mm/dmapool.o
> CC kernel/debug/debug_core.o
> CC mm/hugetlb.o
> CC mm/mempolicy.o
> CC drivers/acpi/sleep.o
> /home/konrad/linux/drivers/block/xen-blkback/blkback.c: In function ‘print_stats’:
> /home/konrad/linux/drivers/block/xen-blkback/blkback.c:384: warning: format ‘%3d’ expects type ‘int’, but argument 3 has type ‘long long unsigned int’
> /home/konrad/linux/drivers/block/xen-blkback/blkback.c:384: warning: format ‘%4d’ expects type ‘int’, but argument 4 has type ‘long long unsigned int’
> /home/konrad/linux/drivers/block/xen-blkback/blkback.c:384: warning: format ‘%4d’ expects type ‘int’, but argument 5 has type ‘lo
>
> Could you fix it up please as one big patch if possible?
>
>>
>> Signed-off-by: Zoltan Kiss <zoltan.kiss@citrix.com>
>> Reported-by: Ichiro Ogino <ichiro.ogino@citrix.co.jp>
>> ---
>> drivers/block/xen-blkback/common.h | 14 +++++++-------
>> 1 files changed, 7 insertions(+), 7 deletions(-)
>>
>> diff --git a/drivers/block/xen-blkback/common.h b/drivers/block/xen-blkback/common.h
>> index 6072390..72d09ac 100644
>> --- a/drivers/block/xen-blkback/common.h
>> +++ b/drivers/block/xen-blkback/common.h
>> @@ -208,13 +208,13 @@ struct xen_blkif {
>>
>> /* statistics */
>> unsigned long st_print;
>> - int st_rd_req;
>> - int st_wr_req;
>> - int st_oo_req;
>> - int st_f_req;
>> - int st_ds_req;
>> - int st_rd_sect;
>> - int st_wr_sect;
>> + unsigned long long st_rd_req;
>> + unsigned long long st_wr_req;
>> + unsigned long long st_oo_req;
>> + unsigned long long st_f_req;
>> + unsigned long long st_ds_req;
>> + unsigned long long st_rd_sect;
>> + unsigned long long st_wr_sect;
>>
>> wait_queue_head_t waiting_to_free;
>> };
>> --
>> 1.7.0.4
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>> Please read the FAQ at http://www.tux.org/lkml/
>>
[-- Attachment #2: 0001-xen-blkback-Change-statistics-counter-types-to-unsig.patch --]
[-- Type: text/x-patch, Size: 3192 bytes --]
>From a7e938cfd0685285d807697feb1742784101a6c5 Mon Sep 17 00:00:00 2001
From: Zoltan Kiss <zoltan.kiss@citrix.com>
Date: Mon, 11 Mar 2013 15:52:17 +0000
Subject: [PATCH 1/1] xen-blkback: Change statistics counter types to unsigned
These values shouldn't be negative, but after an overflow their value
can turn into negative, if they are signed. xentop can show bogus
values in this case.
Signed-off-by: Zoltan Kiss <zoltan.kiss@citrix.com>
Reported-by: Ichiro Ogino <ichiro.ogino@citrix.co.jp>
---
drivers/block/xen-blkback/blkback.c | 4 ++--
drivers/block/xen-blkback/common.h | 14 +++++++-------
drivers/block/xen-blkback/xenbus.c | 14 +++++++-------
3 files changed, 16 insertions(+), 16 deletions(-)
diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c
index de1f319..75740f9 100644
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -381,8 +381,8 @@ irqreturn_t xen_blkif_be_int(int irq, void *dev_id)
static void print_stats(struct xen_blkif *blkif)
{
- pr_info("xen-blkback (%s): oo %3d | rd %4d | wr %4d | f %4d"
- " | ds %4d\n",
+ pr_info("xen-blkback (%s): oo %3llu | rd %4llu | wr %4llu | f %4llu"
+ " | ds %4llu\n",
current->comm, blkif->st_oo_req,
blkif->st_rd_req, blkif->st_wr_req,
blkif->st_f_req, blkif->st_ds_req);
diff --git a/drivers/block/xen-blkback/common.h b/drivers/block/xen-blkback/common.h
index 6072390..72d09ac 100644
--- a/drivers/block/xen-blkback/common.h
+++ b/drivers/block/xen-blkback/common.h
@@ -208,13 +208,13 @@ struct xen_blkif {
/* statistics */
unsigned long st_print;
- int st_rd_req;
- int st_wr_req;
- int st_oo_req;
- int st_f_req;
- int st_ds_req;
- int st_rd_sect;
- int st_wr_sect;
+ unsigned long long st_rd_req;
+ unsigned long long st_wr_req;
+ unsigned long long st_oo_req;
+ unsigned long long st_f_req;
+ unsigned long long st_ds_req;
+ unsigned long long st_rd_sect;
+ unsigned long long st_wr_sect;
wait_queue_head_t waiting_to_free;
};
diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c
index 5e237f6..8bfd1bc 100644
--- a/drivers/block/xen-blkback/xenbus.c
+++ b/drivers/block/xen-blkback/xenbus.c
@@ -230,13 +230,13 @@ int __init xen_blkif_interface_init(void)
} \
static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
-VBD_SHOW(oo_req, "%d\n", be->blkif->st_oo_req);
-VBD_SHOW(rd_req, "%d\n", be->blkif->st_rd_req);
-VBD_SHOW(wr_req, "%d\n", be->blkif->st_wr_req);
-VBD_SHOW(f_req, "%d\n", be->blkif->st_f_req);
-VBD_SHOW(ds_req, "%d\n", be->blkif->st_ds_req);
-VBD_SHOW(rd_sect, "%d\n", be->blkif->st_rd_sect);
-VBD_SHOW(wr_sect, "%d\n", be->blkif->st_wr_sect);
+VBD_SHOW(oo_req, "%llu\n", be->blkif->st_oo_req);
+VBD_SHOW(rd_req, "%llu\n", be->blkif->st_rd_req);
+VBD_SHOW(wr_req, "%llu\n", be->blkif->st_wr_req);
+VBD_SHOW(f_req, "%llu\n", be->blkif->st_f_req);
+VBD_SHOW(ds_req, "%llu\n", be->blkif->st_ds_req);
+VBD_SHOW(rd_sect, "%llu\n", be->blkif->st_rd_sect);
+VBD_SHOW(wr_sect, "%llu\n", be->blkif->st_wr_sect);
static struct attribute *xen_vbdstat_attrs[] = {
&dev_attr_oo_req.attr,
--
1.7.0.4
prev parent reply other threads:[~2013-03-11 16:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-05 17:59 [PATCH 1/1] xen-blkback: Change statistics counter types to unsigned Zoltan Kiss
2013-03-08 18:43 ` Konrad Rzeszutek Wilk
2013-03-11 16:15 ` Zoltan Kiss
2013-03-11 16:16 ` Zoltan Kiss [this message]
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