linux-sg2042/arch/s390
Martin Schwidefsky 050eef364a [S390] fix tlb flushing vs. concurrent /proc accesses
The tlb flushing code uses the mm_users field of the mm_struct to
decide if each page table entry needs to be flushed individually with
IPTE or if a global flush for the mm_struct is sufficient after all page
table updates have been done. The comment for mm_users says "How many
users with user space?" but the /proc code increases mm_users after it
found the process structure by pid without creating a new user process.
Which makes mm_users useless for the decision between the two tlb
flusing methods. The current code can be confused to not flush tlb
entries by a concurrent access to /proc files if e.g. a fork is in
progres. The solution for this problem is to make the tlb flushing
logic independent from the mm_users field.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-08-24 09:26:34 +02:00
..
appldata [S390] appldata: fix dev_get_stats 64 bit conversion 2010-08-13 10:06:55 +02:00
boot [S390] Add support for LZO-compressed kernels. 2010-05-26 23:27:10 +02:00
crypto crypto: des_s390 - Checkpatch cleanup 2010-05-26 10:41:03 +10:00
hypfs switch hypfs to ->evict_inode() 2010-08-09 16:47:50 -04:00
include/asm [S390] fix tlb flushing vs. concurrent /proc accesses 2010-08-24 09:26:34 +02:00
kernel [S390] fix tlb flushing vs. concurrent /proc accesses 2010-08-24 09:26:34 +02:00
kvm KVM: Remove memory alias support 2010-08-01 10:47:00 +03:00
lib [S390] uaccess: make sure copy_from_user_overflow is builtin 2010-03-08 12:25:29 +01:00
math-emu tree-wide: fix assorted typos all over the place 2009-12-04 15:39:55 +01:00
mm [S390] fix tlb flushing vs. concurrent /proc accesses 2010-08-24 09:26:34 +02:00
oprofile Combine instrumentation menus in kernel/Kconfig.instrumentation 2007-10-19 11:53:54 -07:00
Kconfig time: Kill off CONFIG_GENERIC_TIME 2010-07-27 12:40:54 +02:00
Kconfig.debug [S390] uaccess: implement strict user copy checks 2010-02-26 22:37:29 +01:00
Makefile Merge commit 'v2.6.35' into kbuild/kbuild 2010-08-04 13:59:13 +02:00
defconfig defconfig reduction 2010-08-14 22:26:53 +02:00