Messages in this thread | | | From | Heinrich Schuchardt <> | Subject | [PATCH 0/3 v5] max_threadx handling | Date | Tue, 24 Feb 2015 20:38:18 +0100 |
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In fork_init a division by zero may occur.
In the first patch the calculation of max_threads is moved from fork_init to a new separate function.
The incorrect calculation of max threads is addressed in the second patch.
Furthermore max_threads is checked against FUTEX_TID_MASK.
The third patch addresses max_threads being set by writing to /proc/sys/kernel/threads-max. The same limits are applied as in fork_init.
New in version 5: Do not update limits of the init process Do not update max_threads on memory hotplug events Corrections to commit messages
New in version 4: Separation of refactoring and correction into separate patches (as requested by Ingo Molnar) Remove redundant argument of fork_init
New in version 3: Determination of max_threads moved to separate function. Handling of /proc/sys/kernel/threads-max Handling of memory hotplugging.
New in version 2: Use div64_u64 for 64-bit division.
Thank you for your helpful feedback: Andrew Morton <akpm@linux-foundation.org> Guenter Roeck <linux@roeck-us.net> Ingo Molnar <mingo@kernel.org> Oleg Nesterov <oleg@redhat.com> Peter Zijlstra <peterz@infradead.org> Vladimir Davydov <vdavydov@parallels.com>
Heinrich Schuchardt (3): kernel/fork.c: new function for max_threads kernel/fork.c: avoid division by zero kernel/sysctl.c: threads-max observe limits
include/linux/sysctl.h | 3 ++ init/main.c | 4 +-- kernel/fork.c | 75 +++++++++++++++++++++++++++++++++++++++++--------- kernel/sysctl.c | 6 ++-- 4 files changed, 69 insertions(+), 19 deletions(-)
-- 2.1.4
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