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authorAndreas Gruenbacher <agruenba@redhat.com>2018-10-02 14:59:54 +0100
committerAndreas Gruenbacher <agruenba@redhat.com>2021-02-17 19:30:26 +0100
commit725d0e9d464d567cd9290e29879d8bffc92013f8 (patch)
tree1951e94f350258b056dd5c790f3317a07ddb5d95 /fs/gfs2/incore.h
parent07974d2a2a98bc3ce15f3411ebe5175c0af8f1c3 (diff)
downloadlinux-725d0e9d464d567cd9290e29879d8bffc92013f8.tar.bz2
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/incore.h')
-rw-r--r--fs/gfs2/incore.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 0640d0c70a75..2679ba54798c 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -107,6 +107,7 @@ struct gfs2_rgrpd {
u32 rd_bitbytes; /* number of bytes in data bitmaps */
u32 rd_free;
u32 rd_requested; /* number of blocks in rd_rstree */
+ u32 rd_reserved; /* number of reserved blocks */
u32 rd_free_clone;
u32 rd_dinodes;
u64 rd_igeneration;
@@ -292,6 +293,7 @@ struct gfs2_blkreserv {
struct gfs2_rgrpd *rs_rgd;
u64 rs_start;
u32 rs_requested;
+ u32 rs_reserved; /* number of reserved blocks */
};
/*