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| author | Eric Dumazet <dada1@cosmosbay.com> | 2008-02-06 01:37:16 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-06 10:41:06 -0800 |
| commit | 9cfe015aa424b3c003baba3841a60dd9b5ad319b (patch) | |
| tree | 5575e06efcf91018f860f2db43979e8e91aba1c3 /Documentation | |
| parent | 774ed22c21ab95d582dfff38560f11cf290baeb4 (diff) | |
| download | linux-9cfe015aa424b3c003baba3841a60dd9b5ad319b.tar.gz linux-9cfe015aa424b3c003baba3841a60dd9b5ad319b.tar.bz2 linux-9cfe015aa424b3c003baba3841a60dd9b5ad319b.zip | |
get rid of NR_OPEN and introduce a sysctl_nr_open
NR_OPEN (historically set to 1024*1024) actually forbids processes to open
more than 1024*1024 handles.
Unfortunatly some production servers hit the not so 'ridiculously high
value' of 1024*1024 file descriptors per process.
Changing NR_OPEN is not considered safe because of vmalloc space potential
exhaust.
This patch introduces a new sysctl (/proc/sys/fs/nr_open) wich defaults to
1024*1024, so that admins can decide to change this limit if their workload
needs it.
[akpm@linux-foundation.org: export it for sparc64]
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/filesystems/proc.txt | 8 | ||||
| -rw-r--r-- | Documentation/sysctl/fs.txt | 10 |
2 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt index e2799b5fafea..5681e2fa1496 100644 --- a/Documentation/filesystems/proc.txt +++ b/Documentation/filesystems/proc.txt @@ -1029,6 +1029,14 @@ nr_inodes Denotes the number of inodes the system has allocated. This number will grow and shrink dynamically. +nr_open +------- + +Denotes the maximum number of file-handles a process can +allocate. Default value is 1024*1024 (1048576) which should be +enough for most machines. Actual limit depends on RLIMIT_NOFILE +resource limit. + nr_free_inodes -------------- diff --git a/Documentation/sysctl/fs.txt b/Documentation/sysctl/fs.txt index aa986a35e994..f99254327ae5 100644 --- a/Documentation/sysctl/fs.txt +++ b/Documentation/sysctl/fs.txt @@ -23,6 +23,7 @@ Currently, these files are in /proc/sys/fs: - inode-max - inode-nr - inode-state +- nr_open - overflowuid - overflowgid - suid_dumpable @@ -91,6 +92,15 @@ usage of file handles and you don't need to increase the maximum. ============================================================== +nr_open: + +This denotes the maximum number of file-handles a process can +allocate. Default value is 1024*1024 (1048576) which should be +enough for most machines. Actual limit depends on RLIMIT_NOFILE +resource limit. + +============================================================== + inode-max, inode-nr & inode-state: As with file handles, the kernel allocates the inode structures |