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Subject[PATCH] Size max files based on memory size

Hi,

The default files_max settings of 8192 is rather low for many workloads.
This patch changes it to be sized based on the available memory. It assumes
file + inode + dentry are roughly 1K and will use upto 10% of the available
memory for files_max.

Also removes two obsolete prototypes in the include file.

Patch for 2.5.3. Please consider applying.

Thanks,
-Andi


--- linux-2.5.3-work/fs/dcache.c-FILESSZ Tue Jan 15 17:53:31 2002
+++ linux-2.5.3-work/fs/dcache.c Mon Feb 4 05:43:51 2002
@@ -1283,6 +1283,7 @@

dcache_init(mempages);
inode_init(mempages);
+ files_init(mempages);
mnt_init(mempages);
bdev_cache_init();
cdev_cache_init();
--- linux-2.5.3-work/fs/file_table.c-FILESSZ Mon Sep 17 22:16:30 2001
+++ linux-2.5.3-work/fs/file_table.c Mon Feb 4 05:43:43 2002
@@ -186,3 +186,17 @@
file_list_unlock();
return 0;
}
+
+void __init files_init(unsigned long mempages)
+{
+ int n;
+ /* One file with associated inode and dcache is very roughly 1K.
+ * Per default don't use more than 10% of our memory for files.
+ */
+
+ n = (mempages * (PAGE_SIZE / 1024)) / 10;
+ files_stat.max_files = n;
+ if (files_stat.max_files < NR_FILE)
+ files_stat.max_files = NR_FILE;
+}
+
--- linux-2.5.3-work/include/linux/fs.h-FILESSZ Wed Jan 30 22:43:34 2002
+++ linux-2.5.3-work/include/linux/fs.h Mon Feb 4 05:43:43 2002
@@ -208,6 +208,7 @@
extern void buffer_init(unsigned long);
extern void inode_init(unsigned long);
extern void mnt_init(unsigned long);
+extern void files_init(unsigned long);

/* bh state bits */
enum bh_state_bits {
@@ -1475,8 +1476,6 @@
}
return 0;
}
-unsigned long generate_cluster(kdev_t, int b[], int);
-unsigned long generate_cluster_swab32(kdev_t, int b[], int);
extern kdev_t ROOT_DEV;
extern char root_device_name[];

-
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