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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-09-24 20:31:45 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-09-24 20:31:45 +0200 |
| commit | 0f26574178f6c698e5d76e66ca68a95cc35eef9f (patch) | |
| tree | af9591d14bd7f2d941cc9baabedaa2c802a0c20c /mm | |
| parent | Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/g... (diff) | |
| parent | mm: delete unnecessary and unsafe init_tlb_ubc() (diff) | |
| download | linux-0f26574178f6c698e5d76e66ca68a95cc35eef9f.tar.xz linux-0f26574178f6c698e5d76e66ca68a95cc35eef9f.zip | |
Merge branch 'hughd-fixes' (patches from Hugh Dickins)
Merge VM fixes from High Dickins:
"I get the impression that Andrew is away or busy at the moment, so I'm
going to send you three independent uncontroversial little mm fixes
directly - though none is strictly a 4.8 regression fix.
- shmem: fix tmpfs to handle the huge= option properly from Toshi
Kani is a one-liner to fix a major embarrassment in 4.8's hugepages
on tmpfs feature: although Hillf pointed it out in June, somehow
both Kirill and I repeatedly dropped the ball on this one. You
might wonder if the feature got tested at all with that bug in:
yes, it did, but for wider testing coverage, Kirill and I had each
relied too much on an override which bypasses that condition.
- huge tmpfs: fix Committed_AS leak just a run-of-the-mill accounting
fix in the same feature.
- mm: delete unnecessary and unsafe init_tlb_ubc() is an unrelated
fix to 4.3's TLB flush batching in reclaim: the bug would be rare,
and none of us will be shamed if this one misses 4.8; but it got
such a quick ack from Mel today that I'm inclined to offer it along
with the first two"
* emailed patches from Hugh Dickins <hughd@google.com>:
mm: delete unnecessary and unsafe init_tlb_ubc()
huge tmpfs: fix Committed_AS leak
shmem: fix tmpfs to handle the huge= option properly
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/shmem.c | 5 | ||||
| -rw-r--r-- | mm/vmscan.c | 19 |
2 files changed, 3 insertions, 21 deletions
diff --git a/mm/shmem.c b/mm/shmem.c index fd8b2b5741b1..971fc83e6402 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -270,7 +270,7 @@ bool shmem_charge(struct inode *inode, long pages) info->alloced -= pages; shmem_recalc_inode(inode); spin_unlock_irqrestore(&info->lock, flags); - + shmem_unacct_blocks(info->flags, pages); return false; } percpu_counter_add(&sbinfo->used_blocks, pages); @@ -291,6 +291,7 @@ void shmem_uncharge(struct inode *inode, long pages) if (sbinfo->max_blocks) percpu_counter_sub(&sbinfo->used_blocks, pages); + shmem_unacct_blocks(info->flags, pages); } /* @@ -1980,7 +1981,7 @@ unsigned long shmem_get_unmapped_area(struct file *file, return addr; sb = shm_mnt->mnt_sb; } - if (SHMEM_SB(sb)->huge != SHMEM_HUGE_NEVER) + if (SHMEM_SB(sb)->huge == SHMEM_HUGE_NEVER) return addr; } diff --git a/mm/vmscan.c b/mm/vmscan.c index b1e12a1ea9cf..0fe8b7113868 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -2303,23 +2303,6 @@ out: } } -#ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH -static void init_tlb_ubc(void) -{ - /* - * This deliberately does not clear the cpumask as it's expensive - * and unnecessary. If there happens to be data in there then the - * first SWAP_CLUSTER_MAX pages will send an unnecessary IPI and - * then will be cleared. - */ - current->tlb_ubc.flush_required = false; -} -#else -static inline void init_tlb_ubc(void) -{ -} -#endif /* CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH */ - /* * This is a basic per-node page freer. Used by both kswapd and direct reclaim. */ @@ -2355,8 +2338,6 @@ static void shrink_node_memcg(struct pglist_data *pgdat, struct mem_cgroup *memc scan_adjusted = (global_reclaim(sc) && !current_is_kswapd() && sc->priority == DEF_PRIORITY); - init_tlb_ubc(); - blk_start_plug(&plug); while (nr[LRU_INACTIVE_ANON] || nr[LRU_ACTIVE_FILE] || nr[LRU_INACTIVE_FILE]) { |