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authorTim Gardner <tim.gardner@canonical.com>2011-05-24 17:13:05 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-05-25 08:39:43 -0700
commit0ac1ee0bfec2a4ad118f907ce586d0dfd8db7641 (patch)
tree630d3fead5040b26bfdb1328a18fc0ad3b09f88b
parentdb271cf03f5fe39feab8e1b1818c0880c7290c5c (diff)
ulimit: raise default hard ulimit on number of files to 4096
Apps are increasingly using more than 1024 file descriptors. See discussion in several distro bug trackers, e.g. BugLink: http://bugs.launchpad.net/bugs/663090 https://issues.rpath.com/browse/RPL-2054 You don't want to raise the default soft limit, since that might break apps that use select(), but it's safe to raise the default hard limit; that way, apps that know they need lots of file descriptors can raise their soft limit without needing root, and without user intervention. Ubuntu is doing this with a kernel change because they have a policy of not changing kernel defaults in userland. While 4096 might not be enough for *all* apps, it seems to be plenty for the apps I've seen lately that are unhappy with 1024. Signed-off-by: Tim Gardner <tim.gardner@canonical.com> Cc: Dan Kegel <dank@kegel.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/asm-generic/resource.h2
-rw-r--r--include/linux/fs.h3
2 files changed, 3 insertions, 2 deletions
diff --git a/include/asm-generic/resource.h b/include/asm-generic/resource.h
index 587566f95f6c..61fa862fe08d 100644
--- a/include/asm-generic/resource.h
+++ b/include/asm-generic/resource.h
@@ -78,7 +78,7 @@
[RLIMIT_CORE] = { 0, RLIM_INFINITY }, \
[RLIMIT_RSS] = { RLIM_INFINITY, RLIM_INFINITY }, \
[RLIMIT_NPROC] = { 0, 0 }, \
- [RLIMIT_NOFILE] = { INR_OPEN, INR_OPEN }, \
+ [RLIMIT_NOFILE] = { INR_OPEN_CUR, INR_OPEN_MAX }, \
[RLIMIT_MEMLOCK] = { MLOCK_LIMIT, MLOCK_LIMIT }, \
[RLIMIT_AS] = { RLIM_INFINITY, RLIM_INFINITY }, \
[RLIMIT_LOCKS] = { RLIM_INFINITY, RLIM_INFINITY }, \
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 5bb9e826019b..3f9d3251790d 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -23,7 +23,8 @@
/* Fixed constants first: */
#undef NR_OPEN
-#define INR_OPEN 1024 /* Initial setting for nfile rlimits */
+#define INR_OPEN_CUR 1024 /* Initial setting for nfile rlimits */
+#define INR_OPEN_MAX 4096 /* Hard limit for nfile rlimits */
#define BLOCK_SIZE_BITS 10
#define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)