diff options
| author |   Filipe Manana <fdmanana@suse.com> | 2024-12-09 16:43:44 +0000 |
|---|---|---|
| committer |   David Sterba <dsterba@suse.com> | 2024-12-23 22:04:48 +0100 |
| commit | 2c8507c63f5498d4ee4af404a8e44ceae4345056 (patch) | |
| tree | 264ae7e3961d048c4a7a05b9e2a7bdc7bdc2fbf7 | |
| parent | btrfs: allow swap activation to be interruptible (diff) | |
| download | wireguard-linux-2c8507c63f5498d4ee4af404a8e44ceae4345056.tar.xz wireguard-linux-2c8507c63f5498d4ee4af404a8e44ceae4345056.zip | |
btrfs: avoid monopolizing a core when activating a swap file
During swap activation we iterate over the extents of a file and we can
have many thousands of them, so we can end up in a busy loop monopolizing
a core. Avoid this by doing a voluntary reschedule after processing each
extent.
CC: stable@vger.kernel.org # 5.4+
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
| -rw-r--r-- | fs/btrfs/inode.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index c4675f4345fd..623d9d7ab480 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -10078,6 +10078,8 @@ static int btrfs_swap_activate(struct swap_info_struct *sis, struct file *file, ret = -EINTR; goto out; } + + cond_resched(); } if (bsi.block_len) |