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| 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/fuse_i.h | |
| parent | virtiofs: maintain a list of busy elements (diff) | |
| download | linux-dev-9a752d18c85ae5da28e4a07d52adfd95eacb2495.tar.xz linux-dev-9a752d18c85ae5da28e4a07d52adfd95eacb2495.zip | |
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/fuse_i.h')
| -rw-r--r-- | fs/fuse/fuse_i.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 32c935f1e1b0..dbaae2f6c73e 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -1130,5 +1130,6 @@ bool fuse_dax_inode_alloc(struct super_block *sb, struct fuse_inode *fi); void fuse_dax_inode_init(struct inode *inode); void fuse_dax_inode_cleanup(struct inode *inode); bool fuse_dax_check_alignment(struct fuse_conn *fc, unsigned int map_alignment); +void fuse_dax_cancel_work(struct fuse_conn *fc); #endif /* _FS_FUSE_I_H */ |