lkml.org 
[lkml]   [2002]   [Feb]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH] Automatic file-max sizing

The default for NR_FILES of 8192 is far too low for many workloads. This
patch does dynamic sizing for it instead. It assumes file+inode+dentry
are roughly 1K and will use upto 10% of the memory for it.

Also removes two obsolete prototypes.

Patch against 2.5.4pre1.

-Andi


--- linux-2.5.4pre1-work/fs/dcache.c-FILESSZ Tue Jan 15 17:53:31 2002
+++ linux-2.5.4pre1-work/fs/dcache.c Thu Feb 7 02:09:02 2002
@@ -1283,6 +1283,7 @@

dcache_init(mempages);
inode_init(mempages);
+ files_init(mempages);
mnt_init(mempages);
bdev_cache_init();
cdev_cache_init();
--- linux-2.5.4pre1-work/fs/file_table.c-FILESSZ Mon Sep 17 22:16:30 2001
+++ linux-2.5.4pre1-work/fs/file_table.c Thu Feb 7 02:09:02 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-2.5.4pre1-work/include/linux/fs.h-FILESSZ Thu Feb 7 01:46:26 2002
+++ linux-2.5.4pre1-work/include/linux/fs.h Thu Feb 7 02:09:02 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[];

-
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/
\
 
 \ /
  Last update: 2005-03-22 13:24    [W:0.023 / U:13.532 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site