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Linux 4.14 compat: IO acct, global_page_state, etc (#6655)

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generic_start_io_acct/generic_end_io_acct in the master
branch of the linux kernel requires that the request_queue
be provided.

Move the logic from freemem in the spl to arc_free_memory
in arc.c. Do this so we can take advantage of global_page_state
interface checks in zfs.

Upstream kernel replaced struct block_device with
struct gendisk in struct bio. Determine if the
function bio_set_dev exists during configure
and have zfs use that if it exists.

bio_set_dev https://github.com/torvalds/linux/commit/74d4699
global_node_page_state https://github.com/torvalds/linux/commit/75ef718
io acct https://github.com/torvalds/linux/commit/d62e26b

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Closes #6635

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Brian Behlendorf
2017-09-19 14:24:34 -07:00
committed by Tony Hutter
parent d3e7d981d4
commit 661907e6bc
7 changed files with 112 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files
module/zfs/arc.c
+20 -2
View File
@@ -3988,6 +3988,24 @@ arc_all_memory(void)
#endif
}
#ifdef _KERNEL
static uint64_t
arc_free_memory(void)
{
#ifdef ZFS_GLOBAL_NODE_PAGE_STATE
return (nr_free_pages() +
global_node_page_state(NR_INACTIVE_FILE) +
global_node_page_state(NR_INACTIVE_ANON) +
global_node_page_state(NR_SLAB_RECLAIMABLE));
#else
return (nr_free_pages() +
global_page_state(NR_INACTIVE_FILE) +
global_page_state(NR_INACTIVE_ANON) +
global_page_state(NR_SLAB_RECLAIMABLE));
#endif
}
#endif
typedef enum free_memory_reason_t {
FMR_UNKNOWN,
FMR_NEEDFREE,
@@ -4024,7 +4042,7 @@ arc_available_memory(void)
int64_t lowest = INT64_MAX;
free_memory_reason_t r = FMR_UNKNOWN;
#ifdef _KERNEL
uint64_t available_memory = ptob(freemem);
uint64_t available_memory = ptob(arc_free_memory());
int64_t n;
#ifdef __linux__
pgcnt_t needfree = btop(arc_need_free);
@@ -6059,7 +6077,7 @@ static int
arc_memory_throttle(uint64_t reserve, uint64_t txg)
{
#ifdef _KERNEL
uint64_t available_memory = ptob(freemem);
uint64_t available_memory = ptob(arc_free_memory());
static uint64_t page_load = 0;
static uint64_t last_txg = 0;
#ifdef __linux__
module/zfs/vdev_disk.c
+10 -2
View File
@@ -498,6 +498,14 @@ vdev_submit_bio_impl(struct bio *bio)
#endif
}
#ifndef HAVE_BIO_SET_DEV
static inline void
bio_set_dev(struct bio *bio, struct block_device *bdev)
{
bio->bi_bdev = bdev;
}
#endif /* !HAVE_BIO_SET_DEV */
static inline void
vdev_submit_bio(struct bio *bio)
{
@@ -580,7 +588,7 @@ retry:
/* Matching put called by vdev_disk_physio_completion */
vdev_disk_dio_get(dr);
dr->dr_bio[i]->bi_bdev = bdev;
bio_set_dev(dr->dr_bio[i], bdev);
BIO_BI_SECTOR(dr->dr_bio[i]) = bio_offset >> 9;
dr->dr_bio[i]->bi_end_io = vdev_disk_physio_completion;
dr->dr_bio[i]->bi_private = dr;
@@ -654,7 +662,7 @@ vdev_disk_io_flush(struct block_device *bdev, zio_t *zio)
bio->bi_end_io = vdev_disk_io_flush_completion;
bio->bi_private = zio;
bio->bi_bdev = bdev;
bio_set_dev(bio, bdev);
bio_set_flush(bio);
vdev_submit_bio(bio);
invalidate_bdev(bdev);
module/zfs/zvol.c
+12 -6
View File
@@ -761,7 +761,8 @@ zvol_write(void *arg)
ASSERT(zv && zv->zv_open_count > 0);
start_jif = jiffies;
generic_start_io_acct(WRITE, bio_sectors(bio), &zv->zv_disk->part0);
blk_generic_start_io_acct(zv->zv_queue, WRITE, bio_sectors(bio),
&zv->zv_disk->part0);
sync = bio_is_fua(bio) || zv->zv_objset->os_sync == ZFS_SYNC_ALWAYS;
@@ -794,7 +795,8 @@ zvol_write(void *arg)
zil_commit(zv->zv_zilog, ZVOL_OBJ);
rw_exit(&zv->zv_suspend_lock);
generic_end_io_acct(WRITE, &zv->zv_disk->part0, start_jif);
blk_generic_end_io_acct(zv->zv_queue, WRITE, &zv->zv_disk->part0,
start_jif);
BIO_END_IO(bio, -error);
kmem_free(zvr, sizeof (zv_request_t));
}
@@ -840,7 +842,8 @@ zvol_discard(void *arg)
ASSERT(zv && zv->zv_open_count > 0);
start_jif = jiffies;
generic_start_io_acct(WRITE, bio_sectors(bio), &zv->zv_disk->part0);
blk_generic_start_io_acct(zv->zv_queue, WRITE, bio_sectors(bio),
&zv->zv_disk->part0);
sync = bio_is_fua(bio) || zv->zv_objset->os_sync == ZFS_SYNC_ALWAYS;
@@ -881,7 +884,8 @@ unlock:
zil_commit(zv->zv_zilog, ZVOL_OBJ);
rw_exit(&zv->zv_suspend_lock);
generic_end_io_acct(WRITE, &zv->zv_disk->part0, start_jif);
blk_generic_end_io_acct(zv->zv_queue, WRITE, &zv->zv_disk->part0,
start_jif);
BIO_END_IO(bio, -error);
kmem_free(zvr, sizeof (zv_request_t));
}
@@ -902,7 +906,8 @@ zvol_read(void *arg)
ASSERT(zv && zv->zv_open_count > 0);
start_jif = jiffies;
generic_start_io_acct(READ, bio_sectors(bio), &zv->zv_disk->part0);
blk_generic_start_io_acct(zv->zv_queue, READ, bio_sectors(bio),
&zv->zv_disk->part0);
while (uio.uio_resid > 0 && uio.uio_loffset < volsize) {
uint64_t bytes = MIN(uio.uio_resid, DMU_MAX_ACCESS >> 1);
@@ -922,7 +927,8 @@ zvol_read(void *arg)
zfs_range_unlock(zvr->rl);
rw_exit(&zv->zv_suspend_lock);
generic_end_io_acct(READ, &zv->zv_disk->part0, start_jif);
blk_generic_end_io_acct(zv->zv_queue, READ, &zv->zv_disk->part0,
start_jif);
BIO_END_IO(bio, -error);
kmem_free(zvr, sizeof (zv_request_t));
}