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| author | Anand Jain <anand.jain@oracle.com> | 2017-06-13 17:32:29 +0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2017-06-19 18:26:04 +0200 |
| commit | 12b9bf0b942ecca695fe709ea754091918d88b01 (patch) | |
| tree | dd45e7c67f0431fabc307e90938eb9c6c6e6f2e2 /fs/btrfs/disk-io.c | |
| parent | 170607ebd9c891d6765445434460065b2e73ca51 (diff) | |
| download | linux-12b9bf0b942ecca695fe709ea754091918d88b01.tar.bz2 | |
btrfs: write_dev_flush does not return ENOMEM anymore
Since commit "btrfs: btrfs_io_bio_alloc never fails, skip error handling"
write_dev_flush will not return ENOMEM in the sending part. We do not
need to check for it in the callers.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ updated changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/disk-io.c')
| -rw-r--r-- | fs/btrfs/disk-io.c | 38 |
1 files changed, 5 insertions, 33 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 8b57c280e5cd..1e90469cc0d2 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -3505,13 +3505,6 @@ static int write_dev_flush(struct btrfs_device *device, int wait) if (wait) { bio = device->flush_bio; - if (!bio) - /* - * This means the alloc has failed with ENOMEM, however - * here we return 0, as its not a device error. - */ - return 0; - wait_for_completion(&device->flush_wait); if (bio->bi_error) { @@ -3548,25 +3541,16 @@ static int write_dev_flush(struct btrfs_device *device, int wait) static int check_barrier_error(struct btrfs_fs_devices *fsdevs) { - int submit_flush_error = 0; int dev_flush_error = 0; struct btrfs_device *dev; - int tolerance; list_for_each_entry_rcu(dev, &fsdevs->devices, dev_list) { - if (!dev->bdev) { - submit_flush_error++; - dev_flush_error++; - continue; - } - if (dev->last_flush_error == -ENOMEM) - submit_flush_error++; - if (dev->last_flush_error && dev->last_flush_error != -ENOMEM) + if (!dev->bdev || dev->last_flush_error) dev_flush_error++; } - tolerance = fsdevs->fs_info->num_tolerated_disk_barrier_failures; - if (submit_flush_error > tolerance || dev_flush_error > tolerance) + if (dev_flush_error > + fsdevs->fs_info->num_tolerated_disk_barrier_failures) return -EIO; return 0; @@ -3596,10 +3580,8 @@ static int barrier_all_devices(struct btrfs_fs_info *info) if (!dev->in_fs_metadata || !dev->writeable) continue; - ret = write_dev_flush(dev, 0); - if (ret) - errors_send++; - dev->last_flush_error = ret; + write_dev_flush(dev, 0); + dev->last_flush_error = 0; } /* wait for all the barriers */ @@ -3620,16 +3602,6 @@ static int barrier_all_devices(struct btrfs_fs_info *info) } } - /* - * Try hard in case of flush. Lets say, in RAID1 we have - * the following situation - * dev1: EIO dev2: ENOMEM - * this is not a fatal error as we hope to recover from - * ENOMEM in the next attempt to flush. - * But the following is considered as fatal - * dev1: ENOMEM dev2: ENOMEM - * dev1: bdev == NULL dev2: ENOMEM - */ if (errors_send || errors_wait) { /* * At some point we need the status of all disks |