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authorLinus Torvalds <torvalds@linux-foundation.org>2017-11-14 15:32:19 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-14 15:32:19 -0800
commite2c5923c349c1738fe8fda980874d93f6fb2e5b6 (patch)
treeb97a90170c45211bcc437761653aa8016c34afcd /mm
parentabc36be236358162202e86ad88616ff95a755101 (diff)
parenta04b5de5050ab8b891128eb2c47a0916fe8622e1 (diff)
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Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block
Pull core block layer updates from Jens Axboe: "This is the main pull request for block storage for 4.15-rc1. Nothing out of the ordinary in here, and no API changes or anything like that. Just various new features for drivers, core changes, etc. In particular, this pull request contains: - A patch series from Bart, closing the whole on blk/scsi-mq queue quescing. - A series from Christoph, building towards hidden gendisks (for multipath) and ability to move bio chains around. - NVMe - Support for native multipath for NVMe (Christoph). - Userspace notifications for AENs (Keith). - Command side-effects support (Keith). - SGL support (Chaitanya Kulkarni) - FC fixes and improvements (James Smart) - Lots of fixes and tweaks (Various) - bcache - New maintainer (Michael Lyle) - Writeback control improvements (Michael) - Various fixes (Coly, Elena, Eric, Liang, et al) - lightnvm updates, mostly centered around the pblk interface (Javier, Hans, and Rakesh). - Removal of unused bio/bvec kmap atomic interfaces (me, Christoph) - Writeback series that fix the much discussed hundreds of millions of sync-all units. This goes all the way, as discussed previously (me). - Fix for missing wakeup on writeback timer adjustments (Yafang Shao). - Fix laptop mode on blk-mq (me). - {mq,name} tupple lookup for IO schedulers, allowing us to have alias names. This means you can use 'deadline' on both !mq and on mq (where it's called mq-deadline). (me). - blktrace race fix, oopsing on sg load (me). - blk-mq optimizations (me). - Obscure waitqueue race fix for kyber (Omar). - NBD fixes (Josef). - Disable writeback throttling by default on bfq, like we do on cfq (Luca Miccio). - Series from Ming that enable us to treat flush requests on blk-mq like any other request. This is a really nice cleanup. - Series from Ming that improves merging on blk-mq with schedulers, getting us closer to flipping the switch on scsi-mq again. - BFQ updates (Paolo). - blk-mq atomic flags memory ordering fixes (Peter Z). - Loop cgroup support (Shaohua). - Lots of minor fixes from lots of different folks, both for core and driver code" * 'for-4.15/block' of git://git.kernel.dk/linux-block: (294 commits) nvme: fix visibility of "uuid" ns attribute blk-mq: fixup some comment typos and lengths ide: ide-atapi: fix compile error with defining macro DEBUG blk-mq: improve tag waiting setup for non-shared tags brd: remove unused brd_mutex blk-mq: only run the hardware queue if IO is pending block: avoid null pointer dereference on null disk fs: guard_bio_eod() needs to consider partitions xtensa/simdisk: fix compile error nvme: expose subsys attribute to sysfs nvme: create 'slaves' and 'holders' entries for hidden controllers block: create 'slaves' and 'holders' entries for hidden gendisks nvme: also expose the namespace identification sysfs files for mpath nodes nvme: implement multipath access to nvme subsystems nvme: track shared namespaces nvme: introduce a nvme_ns_ids structure nvme: track subsystems block, nvme: Introduce blk_mq_req_flags_t block, scsi: Make SCSI quiesce and resume work reliably block: Add the QUEUE_FLAG_PREEMPT_ONLY request queue flag ...
Diffstat (limited to 'mm')
-rw-r--r--mm/backing-dev.c20
-rw-r--r--mm/page-writeback.c36
-rw-r--r--mm/page_io.c2
-rw-r--r--mm/vmscan.c2
4 files changed, 20 insertions, 40 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index e19606bb41a0..74b52dfd5852 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -1072,23 +1072,3 @@ out:
return ret;
}
EXPORT_SYMBOL(wait_iff_congested);
-
-int pdflush_proc_obsolete(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos)
-{
- char kbuf[] = "0\n";
-
- if (*ppos || *lenp < sizeof(kbuf)) {
- *lenp = 0;
- return 0;
- }
-
- if (copy_to_user(buffer, kbuf, sizeof(kbuf)))
- return -EFAULT;
- pr_warn_once("%s exported in /proc is scheduled for removal\n",
- table->procname);
-
- *lenp = 2;
- *ppos += *lenp;
- return 2;
-}
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 0b9c5cbe8eba..c518c845f202 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1972,31 +1972,31 @@ bool wb_over_bg_thresh(struct bdi_writeback *wb)
int dirty_writeback_centisecs_handler(struct ctl_table *table, int write,
void __user *buffer, size_t *length, loff_t *ppos)
{
- proc_dointvec(table, write, buffer, length, ppos);
- return 0;
+ unsigned int old_interval = dirty_writeback_interval;
+ int ret;
+
+ ret = proc_dointvec(table, write, buffer, length, ppos);
+
+ /*
+ * Writing 0 to dirty_writeback_interval will disable periodic writeback
+ * and a different non-zero value will wakeup the writeback threads.
+ * wb_wakeup_delayed() would be more appropriate, but it's a pain to
+ * iterate over all bdis and wbs.
+ * The reason we do this is to make the change take effect immediately.
+ */
+ if (!ret && write && dirty_writeback_interval &&
+ dirty_writeback_interval != old_interval)
+ wakeup_flusher_threads(WB_REASON_PERIODIC);
+
+ return ret;
}
#ifdef CONFIG_BLOCK
void laptop_mode_timer_fn(unsigned long data)
{
struct request_queue *q = (struct request_queue *)data;
- int nr_pages = global_node_page_state(NR_FILE_DIRTY) +
- global_node_page_state(NR_UNSTABLE_NFS);
- struct bdi_writeback *wb;
- /*
- * We want to write everything out, not just down to the dirty
- * threshold
- */
- if (!bdi_has_dirty_io(q->backing_dev_info))
- return;
-
- rcu_read_lock();
- list_for_each_entry_rcu(wb, &q->backing_dev_info->wb_list, bdi_node)
- if (wb_has_dirty_io(wb))
- wb_start_writeback(wb, nr_pages, true,
- WB_REASON_LAPTOP_TIMER);
- rcu_read_unlock();
+ wakeup_flusher_threads_bdi(q->backing_dev_info, WB_REASON_LAPTOP_TIMER);
}
/*
diff --git a/mm/page_io.c b/mm/page_io.c
index 5d882de3fbfd..cd52b9cc169b 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -408,7 +408,7 @@ int swap_readpage(struct page *page, bool do_poll)
if (!READ_ONCE(bio->bi_private))
break;
- if (!blk_mq_poll(disk->queue, qc))
+ if (!blk_poll(disk->queue, qc))
break;
}
__set_current_state(TASK_RUNNING);
diff --git a/mm/vmscan.c b/mm/vmscan.c
index eb2f0315b8c0..15b483ef6440 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1868,7 +1868,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
* also allow kswapd to start writing pages during reclaim.
*/
if (stat.nr_unqueued_dirty == nr_taken) {
- wakeup_flusher_threads(0, WB_REASON_VMSCAN);
+ wakeup_flusher_threads(WB_REASON_VMSCAN);
set_bit(PGDAT_DIRTY, &pgdat->flags);
}