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| author | Andreas Gruenbacher <agruenba@redhat.com> | 2018-10-02 16:59:54 +0300 |
|---|---|---|
| committer | Andreas Gruenbacher <agruenba@redhat.com> | 2021-02-17 21:30:26 +0300 |
| commit | 725d0e9d464d567cd9290e29879d8bffc92013f8 (patch) | |
| tree | 1951e94f350258b056dd5c790f3317a07ddb5d95 /fs/gfs2/file.c | |
| parent | 07974d2a2a98bc3ce15f3411ebe5175c0af8f1c3 (diff) | |
| download | linux-725d0e9d464d567cd9290e29879d8bffc92013f8.tar.xz | |
gfs2: Add per-reservation reserved block accounting
Add a rs_reserved field to struct gfs2_blkreserv to keep track of the number of
blocks reserved by this particular reservation, and a rd_reserved field to
struct gfs2_rgrpd to keep track of the total number of reserved blocks in the
resource group. Those blocks are exclusively reserved, as opposed to the
rs_requested / rd_requested blocks which are tracked in the reservation tree
(rd_rstree) and which can be stolen if necessary.
When making a reservation with gfs2_inplace_reserve, rs_reserved is set to
somewhere between ap->min_target and ap->target depending on the number of free
blocks in the resource group. When allocating blocks with gfs2_alloc_blocks,
rs_reserved is decremented accordingly. Eventually, any reserved but not
consumed blocks are returned to the resource group by gfs2_inplace_release.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Diffstat (limited to 'fs/gfs2/file.c')
| -rw-r--r-- | fs/gfs2/file.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c index 177c4d74ca30..294087516ce0 100644 --- a/fs/gfs2/file.c +++ b/fs/gfs2/file.c @@ -1115,8 +1115,8 @@ static long __gfs2_fallocate(struct file *file, int mode, loff_t offset, loff_t goto out_qunlock; /* check if the selected rgrp limits our max_blks further */ - if (ap.allowed && ap.allowed < max_blks) - max_blks = ap.allowed; + if (ip->i_res.rs_reserved < max_blks) + max_blks = ip->i_res.rs_reserved; /* Almost done. Calculate bytes that can be written using * max_blks. We also recompute max_bytes, data_blocks and |