diff options
| author | Vivek Goyal <vgoyal@redhat.com> | 2020-08-19 18:19:56 -0400 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2020-09-10 11:39:23 +0200 |
| commit | 9a752d18c85ae5da28e4a07d52adfd95eacb2495 (patch) | |
| tree | c337273c403b887dd2cce079a933ffe85ee71649 /fs/fuse/virtio_fs.c | |
| parent | d0cfb9dcbca6ebd21ec78ea719b451ea4c22cecf (diff) | |
virtiofs: add logic to free up a memory range
Add logic to free up a busy memory range. Freed memory range will be
returned to free pool. Add a worker which can be started to select
and free some busy memory ranges.
Process can also steal one of its busy dax ranges if free range is not
available. I will refer it to as direct reclaim.
If free range is not available and nothing can't be stolen from same
inode, caller waits on a waitq for free range to become available.
For reclaiming a range, as of now we need to hold following locks in
specified order.
down_write(&fi->i_mmap_sem);
down_write(&fi->dax->sem);
We look for a free range in following order.
A. Try to get a free range.
B. If not, try direct reclaim.
C. If not, wait for a memory range to become free
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/fuse/virtio_fs.c')
| -rw-r--r-- | fs/fuse/virtio_fs.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c index e25f62276050..da3ede268604 100644 --- a/fs/fuse/virtio_fs.c +++ b/fs/fuse/virtio_fs.c @@ -1341,6 +1341,12 @@ static void virtio_kill_sb(struct super_block *sb) vfs = fc->iq.priv; fsvq = &vfs->vqs[VQ_HIPRIO]; + /* Stop dax worker. Soon evict_inodes() will be called which will + * free all memory ranges belonging to all inodes. + */ + if (IS_ENABLED(CONFIG_FUSE_DAX)) + fuse_dax_cancel_work(fc); + /* Stop forget queue. Soon destroy will be sent */ spin_lock(&fsvq->lock); fsvq->connected = false; |