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
..
asm	[S390] fix tlb flushing vs. concurrent /proc accesses	2010-08-24 09:26:34 +02:00