mirror of https://gitee.com/openkylin/linux.git
050eef364a
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> |
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| .. | ||
| Makefile | ||
| cmm.c | ||
| extmem.c | ||
| fault.c | ||
| hugetlbpage.c | ||
| init.c | ||
| maccess.c | ||
| mmap.c | ||
| page-states.c | ||
| pgtable.c | ||
| vmem.c | ||