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btrfs: account for pinned bytes in should_alloc_chunk 

In a heavy write scenario, we can end up with a large number of pinned bytes.
This can translate into (very) premature ENOSPC because pinned bytes
must be accounted for when allowing a reservation but aren't accounted for
when deciding whether to create a new chunk.

This patch adds the accounting to should_alloc_chunk so that we can
create the chunk.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Jeff Mahoney 2017-06-22 09:51:47 -04:00 committed by David Sterba
parent a7164fa4e0
commit f44d2287d2
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/extent-tree.c
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@ -4419,7 +4419,7 @@ static int should_alloc_chunk(struct btrfs_fs_info *fs_info,
{
struct btrfs_block_rsv *global_rsv = &fs_info->global_block_rsv;
u64 num_bytes = sinfo->total_bytes - sinfo->bytes_readonly;
u64 num_allocated = sinfo->bytes_used + sinfo->bytes_reserved;
u64 num_allocated = sinfo->bytes_used + sinfo->bytes_reserved + sinfo->bytes_pinned;
u64 thresh;
if (force == CHUNK_ALLOC_FORCE)