The patch titled
Subject: Doc/sysctl/kernel.txt: document threads-max
has been added to the -mm tree. Its filename is
doc-sysctl-kerneltxt-document-threads-max.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/doc-sysctl-kerneltxt-document-threads-max.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/doc-sysctl-kerneltxt-document-threads-max.patch
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------------------------------------------------------
From: Heinrich Schuchardt <xypron.glpk@xxxxxx>
Subject: Doc/sysctl/kernel.txt: document threads-max
File /proc/sys/kernel/threads-max controls the maximum number of threads
that can be created using fork().
Signed-off-by: Heinrich Schuchardt <xypron.glpk@xxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/sysctl/kernel.txt | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff -puN Documentation/sysctl/kernel.txt~doc-sysctl-kerneltxt-document-threads-max Documentation/sysctl/kernel.txt
--- a/Documentation/sysctl/kernel.txt~doc-sysctl-kerneltxt-document-threads-max
+++ a/Documentation/sysctl/kernel.txt
@@ -872,6 +872,27 @@ can be ORed together:
==============================================================
+threads-max
+
+This value controls the maximum number of threads that can be created
+using fork().
+
+During initialization the kernel sets this value such that even if the
+maximum number of threads is created, the thread structures occupy only
+a part (1/8th) of the available RAM pages.
+
+The minimum value that can be written to threads-max is 20.
+The maximum vlaue that can be written to threads-max is given by the
+constant FUTEX_TID_MASK (0x3fffffff).
+If a value outside of this range is written to threads-max an error
+EINVAL occurs.
+
+The value written is checked against the available RAM pages. If the
+thread structures would occupy too much (more than 1/8th) of the
+available RAM pages threads-max is reduced accordingly.
+
+==============================================================
+
unknown_nmi_panic:
The value in this file affects behavior of handling NMI. When the
_
Patches currently in -mm which might be from xypron.glpk@xxxxxx are
kernel-forkc-new-function-for-max_threads.patch
kernel-forkc-avoid-division-by-zero.patch
kernel-forkc-avoid-division-by-zero-fix.patch
kernel-sysctlc-threads-max-observe-limits.patch
doc-sysctl-kerneltxt-document-threads-max.patch
doc-sysctl-kerneltxt-document-threads-max-fix.patch
linux-next.patch
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