Re: [PATCH] 2.6.0-test4 -- add context switch counters

William Lee Irwin III
2003-11-18T01:19:25Z

On Wed, Aug 27, 2003 at 11:50:30AM +1000, Peter Chubb wrote:
>> -- Track and integrate rss.
>> -- Fix the page fault accounting (currently some minor faults
>> are counted as major faults)

On Wed, Aug 27, 2003 at 12:26:33AM -0700, William Lee Irwin III wrote:
> Hmm, I don't remember this offhand. I thought the bigger issue was with
> threads.

How does this look? I probably did the bull in the china shop thing
again, but I can just take feedback and clean things up as-needed.

-- wli

===== Documentation/filesystems/Locking 1.45 vs edited =====
--- 1.45/Documentation/filesystems/Locking Wed Aug 20 22:31:59 2003
+++ edited/Documentation/filesystems/Locking Mon Oct 13 15:13:40 2003
@@ -420,7 +420,7 @@
prototypes:
void (*open)(struct vm_area_struct*);
void (*close)(struct vm_area_struct*);
- struct page *(*nopage)(struct vm_area_struct*, unsigned long, int);
+ struct page *(*nopage)(struct vm_area_struct*, unsigned long, int *);

locking rules:
BKL mmap_sem
===== arch/i386/mm/hugetlbpage.c 1.38 vs edited =====
--- 1.38/arch/i386/mm/hugetlbpage.c Tue Sep 23 23:15:29 2003
+++ edited/arch/i386/mm/hugetlbpage.c Mon Oct 13 15:14:10 2003
@@ -529,7 +529,7 @@
* this far.
*/
static struct page *hugetlb_nopage(struct vm_area_struct *vma,
- unsigned long address, int unused)
+ unsigned long address, int *unused)
{
BUG();
return NULL;
===== arch/ia64/ia32/binfmt_elf32.c 1.15 vs edited =====
--- 1.15/arch/ia64/ia32/binfmt_elf32.c Mon Jul 21 07:39:59 2003
+++ edited/arch/ia64/ia32/binfmt_elf32.c Mon Oct 13 15:15:42 2003
@@ -60,11 +60,13 @@
extern unsigned long *ia32_gdt;

struct page *
-ia32_install_shared_page (struct vm_area_struct *vma, unsigned long address, int no_share)
+ia32_install_shared_page (struct vm_area_struct *vma, unsigned long address, int *type)
{
struct page *pg = ia32_shared_page[(address - vma->vm_start)/PAGE_SIZE];

get_page(pg);
+ if (type)
+ *type = VM_FAULT_MINOR;
return pg;
}

===== arch/ia64/mm/hugetlbpage.c 1.15 vs edited =====
--- 1.15/arch/ia64/mm/hugetlbpage.c Thu Oct 9 16:09:37 2003
+++ edited/arch/ia64/mm/hugetlbpage.c Mon Oct 13 15:15:53 2003
@@ -518,7 +518,7 @@
return 1;
}

-static struct page *hugetlb_nopage(struct vm_area_struct * area, unsigned long address, int unused)
+static struct page *hugetlb_nopage(struct vm_area_struct * area, unsigned long address, int *unused)
{
BUG();
return NULL;
===== arch/ppc64/mm/hugetlbpage.c 1.2 vs edited =====
--- 1.2/arch/ppc64/mm/hugetlbpage.c Sat Sep 6 18:40:37 2003
+++ edited/arch/ppc64/mm/hugetlbpage.c Mon Oct 13 16:16:04 2003
@@ -914,7 +914,7 @@
* this far.
*/
static struct page *hugetlb_nopage(struct vm_area_struct *vma,
- unsigned long address, int unused)
+ unsigned long address, int *unused)
{
BUG();
return NULL;
===== arch/sparc64/mm/hugetlbpage.c 1.8 vs edited =====
--- 1.8/arch/sparc64/mm/hugetlbpage.c Tue Aug 26 09:41:27 2003
+++ edited/arch/sparc64/mm/hugetlbpage.c Mon Oct 13 15:16:38 2003
@@ -433,7 +433,7 @@
}

static struct page *
-hugetlb_nopage(struct vm_area_struct *vma, unsigned long address, int unused)
+hugetlb_nopage(struct vm_area_struct *vma, unsigned long address, int *unused)
{
BUG();
return NULL;
===== drivers/char/agp/alpha-agp.c 1.9 vs edited =====
--- 1.9/drivers/char/agp/alpha-agp.c Mon Sep 15 17:03:51 2003
+++ edited/drivers/char/agp/alpha-agp.c Mon Oct 13 15:17:14 2003
@@ -13,7 +13,7 @@

static struct page *alpha_core_agp_vm_nopage(struct vm_area_struct *vma,
unsigned long address,
- int write_access)
+ int *type)
{
alpha_agp_info *agp = agp_bridge->dev_private_data;
dma_addr_t dma_addr;
@@ -30,6 +30,8 @@
*/
page = virt_to_page(__va(pa));
get_page(page);
+ if (type)
+ *type = VM_FAULT_MINOR;
return page;
}

===== drivers/char/drm/drmP.h 1.29 vs edited =====
--- 1.29/drivers/char/drm/drmP.h Thu Sep 25 08:56:58 2003
+++ edited/drivers/char/drm/drmP.h Mon Oct 13 15:17:38 2003
@@ -760,16 +760,16 @@
/* Mapping support (drm_vm.h) */
extern struct page *DRM(vm_nopage)(struct vm_area_struct *vma,
unsigned long address,
- int write_access);
+ int *type);
extern struct page *DRM(vm_shm_nopage)(struct vm_area_struct *vma,
unsigned long address,
- int write_access);
+ int *type);
extern struct page *DRM(vm_dma_nopage)(struct vm_area_struct *vma,
unsigned long address,
- int write_access);
+ int *type);
extern struct page *DRM(vm_sg_nopage)(struct vm_area_struct *vma,
unsigned long address,
- int write_access);
+ int *type);
extern void DRM(vm_open)(struct vm_area_struct *vma);
extern void DRM(vm_close)(struct vm_area_struct *vma);
extern void DRM(vm_shm_close)(struct vm_area_struct *vma);
===== drivers/char/drm/drm_vm.h 1.25 vs edited =====
--- 1.25/drivers/char/drm/drm_vm.h Thu Jul 10 23:18:01 2003
+++ edited/drivers/char/drm/drm_vm.h Mon Oct 13 16:48:08 2003
@@ -76,7 +76,7 @@
*/
struct page *DRM(vm_nopage)(struct vm_area_struct *vma,
unsigned long address,
- int write_access)
+ int *type)
{
#if __REALLY_HAVE_AGP
drm_file_t *priv = vma->vm_file->private_data;
@@ -133,6 +133,8 @@
baddr, __va(agpmem->memory->memory[offset]), offset,
atomic_read(&page->count));

+ if (type)
+ *type = VM_FAULT_MINOR;
return page;
}
vm_nopage_error:
@@ -154,7 +156,7 @@
*/
struct page *DRM(vm_shm_nopage)(struct vm_area_struct *vma,
unsigned long address,
- int write_access)
+ int *type)
{
drm_map_t *map = (drm_map_t *)vma->vm_private_data;
unsigned long offset;
@@ -170,6 +172,8 @@
if (!page)
return NOPAGE_OOM;
get_page(page);
+ if (type)
+ *type = VM_FAULT_MINOR;

DRM_DEBUG("shm_nopage 0x%lx\n", address);
return page;
@@ -268,7 +272,7 @@
*/
struct page *DRM(vm_dma_nopage)(struct vm_area_struct *vma,
unsigned long address,
- int write_access)
+ int *type)
{
drm_file_t *priv = vma->vm_file->private_data;
drm_device_t *dev = priv->dev;
@@ -287,6 +291,8 @@
(offset & (~PAGE_MASK))));

get_page(page);
+ if (type)
+ *type = VM_FAULT_MINOR;

DRM_DEBUG("dma_nopage 0x%lx (page %lu)\n", address, page_nr);
return page;
@@ -304,7 +310,7 @@
*/
struct page *DRM(vm_sg_nopage)(struct vm_area_struct *vma,
unsigned long address,
- int write_access)
+ int *type)
{
drm_map_t *map = (drm_map_t *)vma->vm_private_data;
drm_file_t *priv = vma->vm_file->private_data;
@@ -325,6 +331,8 @@
page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT);
page = entry->pagelist[page_offset];
get_page(page);
+ if (type)
+ *type = VM_FAULT_MINOR;

return page;
}
===== drivers/ieee1394/dma.c 1.5 vs edited =====
--- 1.5/drivers/ieee1394/dma.c Thu Jul 24 17:00:00 2003
+++ edited/drivers/ieee1394/dma.c Mon Oct 13 15:19:12 2003
@@ -187,7 +187,7 @@
/* nopage() handler for mmap access */

static struct page*
-dma_region_pagefault(struct vm_area_struct *area, unsigned long address, int write_access)
+dma_region_pagefault(struct vm_area_struct *area, unsigned long address, int *type)
{
unsigned long offset;
unsigned long kernel_virt_addr;
@@ -202,6 +202,8 @@
(address > (unsigned long) area->vm_start + (PAGE_SIZE * dma->n_pages)) )
goto out;

+ if (type)
+ *type = VM_FAULT_MINOR;
offset = address - area->vm_start;
kernel_virt_addr = (unsigned long) dma->kvirt + offset;
ret = vmalloc_to_page((void*) kernel_virt_addr);
===== drivers/media/video/video-buf.c 1.11 vs edited =====
--- 1.11/drivers/media/video/video-buf.c Mon Oct 6 08:48:02 2003
+++ edited/drivers/media/video/video-buf.c Mon Oct 13 15:19:52 2003
@@ -1076,7 +1076,7 @@
*/
static struct page*
videobuf_vm_nopage(struct vm_area_struct *vma, unsigned long vaddr,
- int write_access)
+ int *type)
{
struct page *page;

@@ -1088,6 +1088,8 @@
if (!page)
return NOPAGE_OOM;
clear_user_page(page_address(page), vaddr, page);
+ if (type)
+ *type = VM_FAULT_MINOR;
return page;
}

===== drivers/scsi/sg.c 1.69 vs edited =====
--- 1.69/drivers/scsi/sg.c Sat Sep 20 02:35:07 2003
+++ edited/drivers/scsi/sg.c Mon Oct 13 15:21:16 2003
@@ -1115,7 +1115,7 @@
}

static struct page *
-sg_vma_nopage(struct vm_area_struct *vma, unsigned long addr, int unused)
+sg_vma_nopage(struct vm_area_struct *vma, unsigned long addr, int *type)
{
Sg_fd *sfp;
struct page *page = NOPAGE_SIGBUS;
@@ -1155,6 +1155,8 @@
page = virt_to_page(page_ptr);
get_page(page); /* increment page count */
}
+ if (type)
+ *type = VM_FAULT_MINOR;
return page;
}

===== fs/ncpfs/mmap.c 1.7 vs edited =====
--- 1.7/fs/ncpfs/mmap.c Sat Aug 10 20:07:55 2002
+++ edited/fs/ncpfs/mmap.c Mon Oct 13 16:23:56 2003
@@ -26,7 +26,7 @@
* Fill in the supplied page for mmap
*/
static struct page* ncp_file_mmap_nopage(struct vm_area_struct *area,
- unsigned long address, int write_access)
+ unsigned long address, int *type)
{
struct file *file = area->vm_file;
struct dentry *dentry = file->f_dentry;
@@ -85,6 +85,15 @@
memset(pg_addr + already_read, 0, PAGE_SIZE - already_read);
flush_dcache_page(page);
kunmap(page);
+
+ /*
+ * If I understand ncp_read_kernel() properly, the above always
+ * fetches from the network, here the analogue of disk.
+ * -- wli
+ */
+ if (type)
+ *type = VM_FAULT_MAJOR;
+ inc_page_state(pgmajfault);
return page;
}

===== include/linux/mm.h 1.133 vs edited =====
--- 1.133/include/linux/mm.h Sun Oct 5 01:07:49 2003
+++ edited/include/linux/mm.h Mon Oct 13 16:31:00 2003
@@ -143,7 +143,7 @@
struct vm_operations_struct {
void (*open)(struct vm_area_struct * area);
void (*close)(struct vm_area_struct * area);
- struct page * (*nopage)(struct vm_area_struct * area, unsigned long address, int unused);
+ struct page * (*nopage)(struct vm_area_struct * area, unsigned long address, int *type);
int (*populate)(struct vm_area_struct * area, unsigned long address, unsigned long len, pgprot_t prot, unsigned long pgoff, int nonblock);
};

@@ -405,7 +405,7 @@
extern void show_free_areas(void);

struct page *shmem_nopage(struct vm_area_struct * vma,
- unsigned long address, int unused);
+ unsigned long address, int *type);
struct file *shmem_file_setup(char * name, loff_t size, unsigned long flags);
void shmem_lock(struct file * file, int lock);
int shmem_zero_setup(struct vm_area_struct *);
@@ -563,7 +563,7 @@
extern void truncate_inode_pages(struct address_space *, loff_t);

/* generic vm_area_ops exported for stackable file systems */
-extern struct page *filemap_nopage(struct vm_area_struct *, unsigned long, int);
+struct page *filemap_nopage(struct vm_area_struct *, unsigned long, int *);

/* mm/page-writeback.c */
int write_one_page(struct page *page, int wait);
===== kernel/sys.c 1.66 vs edited =====
--- 1.66/kernel/sys.c Thu Oct 9 15:13:54 2003
+++ edited/kernel/sys.c Mon Oct 13 16:02:41 2003
@@ -1325,8 +1325,6 @@
* either stopped or zombied. In the zombied case the task won't get
* reaped till shortly after the call to getrusage(), in both cases the
* task being examined is in a frozen state so the counters won't change.
- *
- * FIXME! Get the fault counts properly!
*/
int getrusage(struct task_struct *p, int who, struct rusage __user *ru)
{
===== mm/filemap.c 1.210 vs edited =====
--- 1.210/mm/filemap.c Tue Oct 7 19:53:43 2003
+++ edited/mm/filemap.c Mon Oct 13 16:25:46 2003
@@ -984,7 +984,7 @@
* it in the page cache, and handles the special cases reasonably without
* having a lot of duplicated code.
*/
-struct page * filemap_nopage(struct vm_area_struct * area, unsigned long address, int unused)
+struct page * filemap_nopage(struct vm_area_struct * area, unsigned long address, int *type)
{
int error;
struct file *file = area->vm_file;
@@ -993,7 +993,7 @@
struct inode *inode = mapping->host;
struct page *page;
unsigned long size, pgoff, endoff;
- int did_readaround = 0;
+ int did_readaround = 0, majmin = VM_FAULT_MINOR;

pgoff = ((address - area->vm_start) >> PAGE_CACHE_SHIFT) + area->vm_pgoff;
endoff = ((area->vm_end - area->vm_start) >> PAGE_CACHE_SHIFT) + area->vm_pgoff;
@@ -1042,6 +1042,14 @@
if (ra->mmap_miss > ra->mmap_hit + MMAP_LOTSAMISS)
goto no_cached_page;

+ /*
+ * To keep the pgmajfault counter straight, we need to
+ * check did_readaround, as this is an inner loop.
+ */
+ if (!did_readaround) {
+ majmin = VM_FAULT_MAJOR;
+ inc_page_state(pgmajfault);
+ }
did_readaround = 1;
do_page_cache_readahead(mapping, file,
pgoff & ~(MMAP_READAROUND-1), MMAP_READAROUND);
@@ -1063,6 +1071,8 @@
* Found the page and have a reference on it.
*/
mark_page_accessed(page);
+ if (type)
+ *type = majmin;
return page;

outside_data_content:
@@ -1098,7 +1108,10 @@
return NULL;

page_not_uptodate:
- inc_page_state(pgmajfault);
+ if (!did_readaround) {
+ majmin = VM_FAULT_MAJOR;
+ inc_page_state(pgmajfault);
+ }
lock_page(page);

/* Did it get unhashed while we waited for it? */
===== mm/memory.c 1.139 vs edited =====
--- 1.139/mm/memory.c Wed Oct 8 08:59:27 2003
+++ edited/mm/memory.c Mon Oct 13 15:44:10 2003
@@ -1416,7 +1416,7 @@
}
smp_rmb(); /* Prevent CPU from reordering lock-free ->nopage() */
retry:
- new_page = vma->vm_ops->nopage(vma, address & PAGE_MASK, 0);
+ new_page = vma->vm_ops->nopage(vma, address & PAGE_MASK, &ret);

/* no page was available -- either SIGBUS or OOM */
if (new_page == NOPAGE_SIGBUS)
@@ -1485,14 +1485,12 @@
pte_unmap(page_table);
page_cache_release(new_page);
spin_unlock(&mm->page_table_lock);
- ret = VM_FAULT_MINOR;
goto out;
}

/* no need to invalidate: a not-present page shouldn't be cached */
update_mmu_cache(vma, address, entry);
spin_unlock(&mm->page_table_lock);
- ret = VM_FAULT_MAJOR;
goto out;
oom:
ret = VM_FAULT_OOM;
===== mm/shmem.c 1.135 vs edited =====
--- 1.135/mm/shmem.c Tue Sep 9 23:41:41 2003
+++ edited/mm/shmem.c Mon Oct 13 16:30:00 2003
@@ -67,7 +67,7 @@
};

static int shmem_getpage(struct inode *inode, unsigned long idx,
- struct page **pagep, enum sgp_type sgp);
+ struct page **pagep, enum sgp_type sgp, int *type);

static inline struct page *shmem_dir_alloc(unsigned int gfp_mask)
{
@@ -522,7 +522,7 @@
if (attr->ia_size & (PAGE_CACHE_SIZE-1)) {
(void) shmem_getpage(inode,
attr->ia_size>>PAGE_CACHE_SHIFT,
- &page, SGP_READ);
+ &page, SGP_READ, NULL);
}
}
}
@@ -734,7 +734,7 @@
* vm. If we swap it in we mark it dirty since we also free the swap
* entry since a page cannot live in both the swap and page cache
*/
-static int shmem_getpage(struct inode *inode, unsigned long idx, struct page **pagep, enum sgp_type sgp)
+static int shmem_getpage(struct inode *inode, unsigned long idx, struct page **pagep, enum sgp_type sgp, int *type)
{
struct address_space *mapping = inode->i_mapping;
struct shmem_inode_info *info = SHMEM_I(inode);
@@ -743,7 +743,7 @@
struct page *swappage;
swp_entry_t *entry;
swp_entry_t swap;
- int error;
+ int error, majmin = VM_FAULT_MINOR;

if (idx >= SHMEM_MAX_INDEX)
return -EFBIG;
@@ -780,6 +780,10 @@
if (!swappage) {
shmem_swp_unmap(entry);
spin_unlock(&info->lock);
+ /* here we actually do the io */
+ if (majmin == VM_FAULT_MINOR && type)
+ inc_page_state(pgmajfault);
+ majmin = VM_FAULT_MAJOR;
swapin_readahead(swap);
swappage = read_swap_cache_async(swap);
if (!swappage) {
@@ -926,6 +930,8 @@
} else
*pagep = ZERO_PAGE(0);
}
+ if (type)
+ *type = majmin;
return 0;

failed:
@@ -936,7 +942,7 @@
return error;
}

-struct page *shmem_nopage(struct vm_area_struct *vma, unsigned long address, int unused)
+struct page *shmem_nopage(struct vm_area_struct *vma, unsigned long address, int *type)
{
struct inode *inode = vma->vm_file->f_dentry->d_inode;
struct page *page = NULL;
@@ -947,7 +953,7 @@
idx += vma->vm_pgoff;
idx >>= PAGE_CACHE_SHIFT - PAGE_SHIFT;

- error = shmem_getpage(inode, idx, &page, SGP_CACHE);
+ error = shmem_getpage(inode, idx, &page, SGP_CACHE, type);
if (error)
return (error == -ENOMEM)? NOPAGE_OOM: NOPAGE_SIGBUS;

@@ -974,7 +980,7 @@
/*
* Will need changing if PAGE_CACHE_SIZE != PAGE_SIZE
*/
- err = shmem_getpage(inode, pgoff, &page, sgp);
+ err = shmem_getpage(inode, pgoff, &page, sgp, NULL);
if (err)
return err;
if (page) {
@@ -1124,7 +1130,7 @@
shmem_prepare_write(struct file *file, struct page *page, unsigned offset, unsigned to)
{
struct inode *inode = page->mapping->host;
- return shmem_getpage(inode, page->index, &page, SGP_WRITE);
+ return shmem_getpage(inode, page->index, &page, SGP_WRITE, NULL);
}

static ssize_t
@@ -1181,7 +1187,7 @@
* But it still may be a good idea to prefault below.
*/

- err = shmem_getpage(inode, index, &page, SGP_WRITE);
+ err = shmem_getpage(inode, index, &page, SGP_WRITE, NULL);
if (err)
break;

@@ -1264,7 +1270,7 @@
break;
}

- desc->error = shmem_getpage(inode, index, &page, SGP_READ);
+ desc->error = shmem_getpage(inode, index, &page, SGP_READ, NULL);
if (desc->error) {
if (desc->error == -EINVAL)
desc->error = 0;
@@ -1515,7 +1521,7 @@
iput(inode);
return -ENOMEM;
}
- error = shmem_getpage(inode, 0, &page, SGP_WRITE);
+ error = shmem_getpage(inode, 0, &page, SGP_WRITE, NULL);
if (error) {
vm_unacct_memory(VM_ACCT(1));
iput(inode);
@@ -1551,7 +1557,7 @@
static int shmem_readlink(struct dentry *dentry, char __user *buffer, int buflen)
{
struct page *page = NULL;
- int res = shmem_getpage(dentry->d_inode, 0, &page, SGP_READ);
+ int res = shmem_getpage(dentry->d_inode, 0, &page, SGP_READ, NULL);
if (res)
return res;
res = vfs_readlink(dentry, buffer, buflen, kmap(page));
@@ -1564,7 +1570,7 @@
static int shmem_follow_link(struct dentry *dentry, struct nameidata *nd)
{
struct page *page = NULL;
- int res = shmem_getpage(dentry->d_inode, 0, &page, SGP_READ);
+ int res = shmem_getpage(dentry->d_inode, 0, &page, SGP_READ, NULL);
if (res)
return res;
res = vfs_follow_link(nd, kmap(page));
===== sound/core/pcm_native.c 1.41 vs edited =====
--- 1.41/sound/core/pcm_native.c Mon Sep 29 19:28:26 2003
+++ edited/sound/core/pcm_native.c Mon Oct 13 15:44:41 2003
@@ -2779,7 +2779,7 @@
return mask;
}

-static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area, unsigned long address, int no_share)
+static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area, unsigned long address, int *type)
{
snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
snd_pcm_runtime_t *runtime;
@@ -2791,6 +2791,8 @@
page = virt_to_page(runtime->status);
if (!PageReserved(page))
get_page(page);
+ if (type)
+ *type = VM_FAULT_MINOR;
return page;
}

===== sound/oss/via82cxxx_audio.c 1.34 vs edited =====
--- 1.34/sound/oss/via82cxxx_audio.c Sun Oct 5 01:07:55 2003
+++ edited/sound/oss/via82cxxx_audio.c Mon Oct 13 15:53:34 2003
@@ -2116,7 +2116,7 @@

static struct page * via_mm_nopage (struct vm_area_struct * vma,
- unsigned long address, int write_access)
+ unsigned long address, int *type)
{
struct via_info *card = vma->vm_private_data;
struct via_channel *chan = &card->ch_out;
@@ -2124,12 +2124,11 @@
unsigned long pgoff;
int rd, wr;

- DPRINTK ("ENTER, start %lXh, ofs %lXh, pgoff %ld, addr %lXh, wr %d\n",
+ DPRINTK ("ENTER, start %lXh, ofs %lXh, pgoff %ld, addr %lXh\n",
vma->vm_start,
address - vma->vm_start,
(address - vma->vm_start) >> PAGE_SHIFT,
- address,
- write_access);
+ address);

if (address > vma->vm_end) {
DPRINTK ("EXIT, returning NOPAGE_SIGBUS\n");
@@ -2167,6 +2166,8 @@
DPRINTK ("EXIT, returning page %p for cpuaddr %lXh\n",
dmapage, (unsigned long) chan->pgtbl[pgoff].cpuaddr);
get_page (dmapage);
+ if (type)
+ *type = VM_FAULT_MINOR;
return dmapage;
}

===== sound/oss/emu10k1/audio.c 1.19 vs edited =====
--- 1.19/sound/oss/emu10k1/audio.c Tue Aug 26 09:25:41 2003
+++ edited/sound/oss/emu10k1/audio.c Mon Oct 13 15:52:23 2003
@@ -989,7 +989,7 @@
return 0;
}

-static struct page *emu10k1_mm_nopage (struct vm_area_struct * vma, unsigned long address, int write_access)
+static struct page *emu10k1_mm_nopage (struct vm_area_struct * vma, unsigned long address, int *type)
{
struct emu10k1_wavedevice *wave_dev = vma->vm_private_data;
struct woinst *woinst = wave_dev->woinst;
@@ -1032,6 +1032,8 @@
get_page (dmapage);

DPD(3, "page: %#lx\n", (unsigned long) dmapage);
+ if (type)
+ *type = VM_FAULT_MINOR;
return dmapage;
}