Displaying 20 results from an estimated 2613 matches for "page_size".
2019 Aug 15
2
[nbdkit PATCH] data, memory: Optimize .zero > PAGE_SIZE
.../sparse.c b/common/sparse/sparse.c
index cb44743c..5e085763 100644
--- a/common/sparse/sparse.c
+++ b/common/sparse/sparse.c
@@ -343,10 +343,13 @@ sparse_array_zero (struct sparse_array *sa, uint32_t count, uint64_t offset)
n = count;
if (p) {
- memset (p, 0, n);
+ if (n < PAGE_SIZE)
+ memset (p, 0, n);
+ else
+ assert (p == *l2_page);
/* If the whole page is now zero, free it. */
- if (is_zero (*l2_page, PAGE_SIZE)) {
+ if (n == PAGE_SIZE || is_zero (*l2_page, PAGE_SIZE)) {
if (sa->debug)
nbdkit_debug ("%s: free...
2012 Apr 03
3
[PATCH] Btrfs: do not mount when we have a sectorsize unequal to PAGE_SIZE
Our code is not ready to cope with a sectorsize that''s not equal to PAGE_SIZE.
It will lead to hanging-on while writing something.
Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
---
fs/btrfs/disk-io.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 20196f4..b9866f2 100644
--- a/fs/btrfs/dis...
2010 Dec 09
1
[PATCH 1/1] Properly check return values of kmalloc and vmbus_recvpacket
...*context)
{
struct vmbus_channel *channel = context;
u8 *buf;
- u32 buflen, recvlen;
+ u32 recvlen;
u64 requestid;
u8 execute_shutdown = false;
+ int ret = 0;
struct shutdown_msg_data *shutdown_msg;
struct icmsg_hdr *icmsghdrp;
struct icmsg_negotiate *negop = NULL;
- buflen = PAGE_SIZE;
- buf = kmalloc(buflen, GFP_ATOMIC);
+ buf = kmalloc(PAGE_SIZE, GFP_ATOMIC);
- vmbus_recvpacket(channel, buf, buflen, &recvlen, &requestid);
+ if (!buf) {
+ printk(KERN_INFO
+ "Unable to allocate memory for shutdown_onchannelcallback");
+ return;
+ }
+
+ ret = vmbus_r...
2010 Dec 09
1
[PATCH 1/1] Properly check return values of kmalloc and vmbus_recvpacket
...*context)
{
struct vmbus_channel *channel = context;
u8 *buf;
- u32 buflen, recvlen;
+ u32 recvlen;
u64 requestid;
u8 execute_shutdown = false;
+ int ret = 0;
struct shutdown_msg_data *shutdown_msg;
struct icmsg_hdr *icmsghdrp;
struct icmsg_negotiate *negop = NULL;
- buflen = PAGE_SIZE;
- buf = kmalloc(buflen, GFP_ATOMIC);
+ buf = kmalloc(PAGE_SIZE, GFP_ATOMIC);
- vmbus_recvpacket(channel, buf, buflen, &recvlen, &requestid);
+ if (!buf) {
+ printk(KERN_INFO
+ "Unable to allocate memory for shutdown_onchannelcallback");
+ return;
+ }
+
+ ret = vmbus_r...
2013 Jul 10
13
[PATCH v2 1/1] xen/netback: correctly calculate required slots of skb.
...uct sk_buff *skb)
+static int netbk_count_slots(struct xenvif *vif, struct sk_buff *skb,
+ int *copy_off, unsigned long size,
+ unsigned long offset, int *head)
{
- unsigned int count;
- int i, copy_off;
+ unsigned long bytes;
+ int count = 0;
- count = DIV_ROUND_UP(skb_headlen(skb), PAGE_SIZE);
+ offset &= ~PAGE_MASK;
- copy_off = skb_headlen(skb) % PAGE_SIZE;
+ while (size > 0) {
+ BUG_ON(offset >= PAGE_SIZE);
+ BUG_ON(*copy_off > MAX_BUFFER_OFFSET);
- if (skb_shinfo(skb)->gso_size)
- count++;
+ bytes = PAGE_SIZE - offset;
- for (i = 0; i < skb_shinfo(skb)-...
2018 Apr 18
1
[PATCH 1/2] qxl: fix qxl_release_{map,unmap}
s/PAGE_SIZE/PAGE_MASK/
Luckily release_offset is never larger than PAGE_SIZE, so the bug has no
bad side effects and managed to stay unnoticed for years that way ...
Signed-off-by: Gerd Hoffmann <kraxel at redhat.com>
---
drivers/gpu/drm/qxl/qxl_ioctl.c | 4 ++--
drivers/gpu/drm/qxl/qxl_release.c |...
2010 Dec 13
3
[PATCH 1/1] hv: Use only one receive buffer per channel and kmalloc on initialize
...struct vmbus_channel *channel = context;
- u8 *buf;
- u32 buflen, recvlen;
+ u32 recvlen;
u64 requestid;
u8 execute_shutdown = false;
@@ -52,24 +54,23 @@ static void shutdown_onchannelcallback(void *context)
struct icmsg_hdr *icmsghdrp;
struct icmsg_negotiate *negop = NULL;
- buflen = PAGE_SIZE;
- buf = kmalloc(buflen, GFP_ATOMIC);
-
- vmbus_recvpacket(channel, buf, buflen, &recvlen, &requestid);
+ vmbus_recvpacket(channel, shut_txf_buf,
+ PAGE_SIZE, &recvlen, &requestid);
if (recvlen > 0) {
DPRINT_DBG(VMBUS, "shutdown packet: len=%d, requestid=%lld"...
2010 Dec 13
3
[PATCH 1/1] hv: Use only one receive buffer per channel and kmalloc on initialize
...struct vmbus_channel *channel = context;
- u8 *buf;
- u32 buflen, recvlen;
+ u32 recvlen;
u64 requestid;
u8 execute_shutdown = false;
@@ -52,24 +54,23 @@ static void shutdown_onchannelcallback(void *context)
struct icmsg_hdr *icmsghdrp;
struct icmsg_negotiate *negop = NULL;
- buflen = PAGE_SIZE;
- buf = kmalloc(buflen, GFP_ATOMIC);
-
- vmbus_recvpacket(channel, buf, buflen, &recvlen, &requestid);
+ vmbus_recvpacket(channel, shut_txf_buf,
+ PAGE_SIZE, &recvlen, &requestid);
if (recvlen > 0) {
DPRINT_DBG(VMBUS, "shutdown packet: len=%d, requestid=%lld"...
2019 Aug 15
0
Re: [nbdkit PATCH] data, memory: Optimize .zero > PAGE_SIZE
...cb44743c..5e085763 100644
> --- a/common/sparse/sparse.c
> +++ b/common/sparse/sparse.c
> @@ -343,10 +343,13 @@ sparse_array_zero (struct sparse_array *sa, uint32_t count, uint64_t offset)
> n = count;
>
> if (p) {
> - memset (p, 0, n);
> + if (n < PAGE_SIZE)
> + memset (p, 0, n);
> + else
> + assert (p == *l2_page);
>
> /* If the whole page is now zero, free it. */
> - if (is_zero (*l2_page, PAGE_SIZE)) {
> + if (n == PAGE_SIZE || is_zero (*l2_page, PAGE_SIZE)) {
Should this be n >= PAGE_SI...
2007 Apr 18
2
[PATCH 3/6] i386 virtualization - Make ldt a desc struct
...include/asm-i386/desc.h 2005-08-15 11:16:59.000000000 -0700
> +++ linux-2.6.13/include/asm-i386/desc.h 2005-08-15 11:19:49.000000000 -0700
> @@ -6,6 +6,9 @@
>
> #define CPU_16BIT_STACK_SIZE 1024
>
> +/* The number of LDT entries per page */
> +#define LDT_ENTRIES_PER_PAGE (PAGE_SIZE / LDT_ENTRY_SIZE)
> +
> #ifndef __ASSEMBLY__
>
> #include <linux/preempt.h>
> @@ -30,7 +33,7 @@
> static inline unsigned long get_desc_base(struct desc_struct *desc)
> {
> unsigned long base;
> - base = ((desc->a >> 16) & 0x0000ffff) |
> + b...
2007 Apr 18
2
[PATCH 3/6] i386 virtualization - Make ldt a desc struct
...include/asm-i386/desc.h 2005-08-15 11:16:59.000000000 -0700
> +++ linux-2.6.13/include/asm-i386/desc.h 2005-08-15 11:19:49.000000000 -0700
> @@ -6,6 +6,9 @@
>
> #define CPU_16BIT_STACK_SIZE 1024
>
> +/* The number of LDT entries per page */
> +#define LDT_ENTRIES_PER_PAGE (PAGE_SIZE / LDT_ENTRY_SIZE)
> +
> #ifndef __ASSEMBLY__
>
> #include <linux/preempt.h>
> @@ -30,7 +33,7 @@
> static inline unsigned long get_desc_base(struct desc_struct *desc)
> {
> unsigned long base;
> - base = ((desc->a >> 16) & 0x0000ffff) |
> + b...
2017 Jan 23
2
[PATCH v2] virtio_net: fix PAGE_SIZE > 64k
I don't have any guests with PAGE_SIZE > 64k but the
code seems to be clearly broken in that case
as PAGE_SIZE / MERGEABLE_BUFFER_ALIGN will need
more than 8 bit and so the code in mergeable_ctx_to_buf_address
does not give us the actual true size.
Cc: John Fastabend <john.fastabend at gmail.com>
Signed-off-by: Michael S. Tsir...
2017 Jan 23
2
[PATCH v2] virtio_net: fix PAGE_SIZE > 64k
I don't have any guests with PAGE_SIZE > 64k but the
code seems to be clearly broken in that case
as PAGE_SIZE / MERGEABLE_BUFFER_ALIGN will need
more than 8 bit and so the code in mergeable_ctx_to_buf_address
does not give us the actual true size.
Cc: John Fastabend <john.fastabend at gmail.com>
Signed-off-by: Michael S. Tsir...
2013 Aug 23
0
[PATCH 2/2] VMCI: Add support for virtual IOMMU
...dev *vmci_pdev;
static struct vmci_guest_device *vmci_dev_g;
static DEFINE_SPINLOCK(vmci_dev_spinlock);
@@ -528,7 +530,9 @@ static int vmci_guest_probe_device(struct pci_dev *pdev,
* well.
*/
if (capabilities & VMCI_CAPS_NOTIFICATIONS) {
- vmci_dev->notification_bitmap = vmalloc(PAGE_SIZE);
+ vmci_dev->notification_bitmap = dma_alloc_coherent(
+ &pdev->dev, PAGE_SIZE, &vmci_dev->notification_base,
+ GFP_KERNEL);
if (!vmci_dev->notification_bitmap) {
dev_warn(&pdev->dev,
"Unable to allocate notification bitmap\n");
@@ -546,6 +550...
2014 Sep 09
2
mutex
...V;
list_for_each_entry(rng, &rng_list, list) {
if (strcmp(rng->name, buf) == 0) {
if (rng == current_rng) {
@@ -270,8 +271,8 @@ static ssize_t hwrng_attr_current_show(struct device *dev,
return -ERESTARTSYS;
if (current_rng)
name = current_rng->name;
- ret = snprintf(buf, PAGE_SIZE, "%s\n", name);
mutex_unlock(&rng_mutex);
+ ret = snprintf(buf, PAGE_SIZE, "%s\n", name);
return ret;
}
@@ -284,19 +285,19 @@ static ssize_t hwrng_attr_available_show(struct device *dev,
ssize_t ret = 0;
struct hwrng *rng;
+ buf[0] = '\0';
err = mutex_...
2014 Sep 09
2
mutex
...V;
list_for_each_entry(rng, &rng_list, list) {
if (strcmp(rng->name, buf) == 0) {
if (rng == current_rng) {
@@ -270,8 +271,8 @@ static ssize_t hwrng_attr_current_show(struct device *dev,
return -ERESTARTSYS;
if (current_rng)
name = current_rng->name;
- ret = snprintf(buf, PAGE_SIZE, "%s\n", name);
mutex_unlock(&rng_mutex);
+ ret = snprintf(buf, PAGE_SIZE, "%s\n", name);
return ret;
}
@@ -284,19 +285,19 @@ static ssize_t hwrng_attr_available_show(struct device *dev,
ssize_t ret = 0;
struct hwrng *rng;
+ buf[0] = '\0';
err = mutex_...
2012 Jan 26
1
[PATCH] netback: fix multi page ring size calculation.
...changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h
index 477e5ab..f3d95b3 100644
--- a/drivers/net/xen-netback/common.h
+++ b/drivers/net/xen-netback/common.h
@@ -60,9 +60,9 @@ struct xenvif_rx_meta {
#define MAX_BUFFER_OFFSET PAGE_SIZE
#define NETBK_TX_RING_SIZE(_nr_pages) \
- (__CONST_RING_SIZE(xen_netif_tx, PAGE_SIZE) * (_nr_pages))
+ (__CONST_RING_SIZE(xen_netif_tx, PAGE_SIZE * (_nr_pages)))
#define NETBK_RX_RING_SIZE(_nr_pages) \
- (__CONST_RING_SIZE(xen_netif_rx, PAGE_SIZE) * (_nr_pages))
+ (__CONST_RING_SIZE(xen...
2005 May 31
0
[PATCH] Store page and evtchn in start_info_t
...)
+ unsigned int vcpus,
+ unsigned int store_evtchn, unsigned long *store_mfn)
{
l1_pgentry_t *vl1tab=NULL, *vl1e=NULL;
l2_pgentry_t *vl2tab=NULL, *vl2e=NULL;
@@ -108,7 +109,8 @@
{
vpt_end = vpt_start + (nr_pt_pages * PAGE_SIZE);
vstartinfo_start = vpt_end;
- vstartinfo_end = vstartinfo_start + PAGE_SIZE;
+ /* Place store shared page after startinfo. */
+ vstartinfo_end = vstartinfo_start + PAGE_SIZE * 2;
vstack_start = vstartinfo_end;
vstack_end = vstack_start...
2023 Mar 28
1
[PATCH net-next 2/8] virtio_net: mergeable xdp: introduce mergeable_xdp_prepare
...t page *xdp_page;
+ unsigned int xdp_room;
+
+ /* Transient failure which in theory could occur if
+ * in-flight packets from before XDP was enabled reach
+ * the receive path after XDP is loaded.
+ */
+ if (unlikely(hdr->hdr.gso_type))
+ return NULL;
+
+ /* Now XDP core assumes frag size is PAGE_SIZE, but buffers
+ * with headroom may add hole in truesize, which
+ * make their length exceed PAGE_SIZE. So we disabled the
+ * hole mechanism for xdp. See add_recvbuf_mergeable().
+ */
+ *frame_sz = truesize;
+
+ /* This happens when headroom is not enough because
+ * of the buffer was prefille...
2013 Jan 04
31
xennet: skb rides the rocket: 20 slots
...39;t have enough knowledge if this could/should be prevented from happening ?
[16798.629141] xennet: skb rides the rocket: 19 slots MAX_SKB_FRAGS: 17 div_roundup:1 xennet_count_skb_frag_slots:18 offset:106 skb_headlen:1622 skb->len:64294, skb->data_len:62672 skb->truesize:64976 nr_frags:4 page_size:4096 prot:0800
[16800.575182] xennet: skb rides the rocket: 19 slots MAX_SKB_FRAGS: 17 div_roundup:1 xennet_count_skb_frag_slots:18 offset:2154 skb_headlen:1622 skb->len:64294, skb->data_len:62672 skb->truesize:64976 nr_frags:4 page_size:4096 prot:0800
[16801.589166] xennet: skb rides the...