diff options
| author | Eric Dumazet <dada1@cosmosbay.com> | 2008-02-06 12:37:16 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-06 21:41:06 +0300 |
| commit | 9cfe015aa424b3c003baba3841a60dd9b5ad319b (patch) | |
| tree | 5575e06efcf91018f860f2db43979e8e91aba1c3 /arch | |
| parent | 774ed22c21ab95d582dfff38560f11cf290baeb4 (diff) | |
| download | linux-9cfe015aa424b3c003baba3841a60dd9b5ad319b.tar.xz | |
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 'arch')
| -rw-r--r-- | arch/alpha/kernel/osf_sys.c | 2 | ||||
| -rw-r--r-- | arch/mips/kernel/sysirix.c | 2 | ||||
| -rw-r--r-- | arch/sparc64/kernel/sparc64_ksyms.c | 1 | ||||
| -rw-r--r-- | arch/sparc64/solaris/fs.c | 2 | ||||
| -rw-r--r-- | arch/sparc64/solaris/timod.c | 6 |
5 files changed, 8 insertions, 5 deletions
diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c index 6413c5f23226..72f9a619a66d 100644 --- a/arch/alpha/kernel/osf_sys.c +++ b/arch/alpha/kernel/osf_sys.c @@ -430,7 +430,7 @@ sys_getpagesize(void) asmlinkage unsigned long sys_getdtablesize(void) { - return NR_OPEN; + return sysctl_nr_open; } /* diff --git a/arch/mips/kernel/sysirix.c b/arch/mips/kernel/sysirix.c index 4c477c7ff74a..22fd41e946b2 100644 --- a/arch/mips/kernel/sysirix.c +++ b/arch/mips/kernel/sysirix.c @@ -356,7 +356,7 @@ asmlinkage int irix_syssgi(struct pt_regs *regs) retval = NGROUPS_MAX; goto out; case 5: - retval = NR_OPEN; + retval = sysctl_nr_open; goto out; case 6: retval = 1; diff --git a/arch/sparc64/kernel/sparc64_ksyms.c b/arch/sparc64/kernel/sparc64_ksyms.c index 60765e314bd8..8649635d6d74 100644 --- a/arch/sparc64/kernel/sparc64_ksyms.c +++ b/arch/sparc64/kernel/sparc64_ksyms.c @@ -277,6 +277,7 @@ EXPORT_SYMBOL(sys_getpid); EXPORT_SYMBOL(sys_geteuid); EXPORT_SYMBOL(sys_getuid); EXPORT_SYMBOL(sys_getegid); +EXPORT_SYMBOL(sysctl_nr_open); EXPORT_SYMBOL(sys_getgid); EXPORT_SYMBOL(svr4_getcontext); EXPORT_SYMBOL(svr4_setcontext); diff --git a/arch/sparc64/solaris/fs.c b/arch/sparc64/solaris/fs.c index 61be597bf430..9311bfe4f2f7 100644 --- a/arch/sparc64/solaris/fs.c +++ b/arch/sparc64/solaris/fs.c @@ -624,7 +624,7 @@ asmlinkage int solaris_ulimit(int cmd, int val) case 3: /* UL_GMEMLIM */ return current->signal->rlim[RLIMIT_DATA].rlim_cur; case 4: /* UL_GDESLIM */ - return NR_OPEN; + return sysctl_nr_open; } return -EINVAL; } diff --git a/arch/sparc64/solaris/timod.c b/arch/sparc64/solaris/timod.c index a9d32ceabf26..f53123c02c2b 100644 --- a/arch/sparc64/solaris/timod.c +++ b/arch/sparc64/solaris/timod.c @@ -859,7 +859,8 @@ asmlinkage int solaris_getmsg(unsigned int fd, u32 arg1, u32 arg2, u32 arg3) SOLD("entry"); lock_kernel(); - if(fd >= NR_OPEN) goto out; + if (fd >= sysctl_nr_open) + goto out; fdt = files_fdtable(current->files); filp = fdt->fd[fd]; @@ -927,7 +928,8 @@ asmlinkage int solaris_putmsg(unsigned int fd, u32 arg1, u32 arg2, u32 arg3) SOLD("entry"); lock_kernel(); - if(fd >= NR_OPEN) goto out; + if (fd >= sysctl_nr_open) + goto out; fdt = files_fdtable(current->files); filp = fdt->fd[fd]; |