From: Martin Hicks <[EMAIL PROTECTED]>
Working on some code lately I've been getting huge values for "Cached".
The cause is that get_page_cache_size() is an approximate value, and for a
sufficiently small returned value of get_page_cache_size() the value
underflows.
Signed-off-by: Martin Hicks <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
25-akpm/fs/proc/proc_misc.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletion(-)
diff -puN fs/proc/proc_misc.c~meminfo-add-cached-underflow-check
fs/proc/proc_misc.c
--- 25/fs/proc/proc_misc.c~meminfo-add-cached-underflow-check 2005-04-12
03:21:07.910934256 -0700
+++ 25-akpm/fs/proc/proc_misc.c 2005-04-12 03:21:07.914933648 -0700
@@ -126,6 +126,7 @@ static int meminfo_read_proc(char *page,
unsigned long committed;
unsigned long allowed;
struct vmalloc_info vmi;
+ long cached;
get_page_state(&ps);
get_zone_counts(&active, &inactive, &free);
@@ -140,6 +141,10 @@ static int meminfo_read_proc(char *page,
allowed = ((totalram_pages - hugetlb_total_pages())
* sysctl_overcommit_ratio / 100) + total_swap_pages;
+ cached = get_page_cache_size() - total_swapcache_pages - i.bufferram;
+ if (cached < 0)
+ cached = 0;
+
get_vmalloc_info(&vmi);
/*
@@ -172,7 +177,7 @@ static int meminfo_read_proc(char *page,
K(i.totalram),
K(i.freeram),
K(i.bufferram),
- K(get_page_cache_size()-total_swapcache_pages-i.bufferram),
+ K(cached),
K(total_swapcache_pages),
K(active),
K(inactive),
_
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
