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author | Brian Foster <bfoster@redhat.com> | 2012-11-06 14:50:38 (GMT) |
---|---|---|
committer | Ben Myers <bpm@sgi.com> | 2012-11-08 20:20:44 (GMT) |
commit | 27b52867925e3aaed090063c1c58a7537e6373f3 (patch) | |
tree | 901719517ac8dc751053f6bf9d86cbe2b73bf538 /fs/xfs | |
parent | 69a58a43f74eb2cb23d9bce2524dae33c289a40f (diff) | |
download | linux-27b52867925e3aaed090063c1c58a7537e6373f3.tar.xz |
xfs: add EOFBLOCKS inode tagging/untagging
Add the XFS_ICI_EOFBLOCKS_TAG inode tag to identify inodes with
speculatively preallocated blocks beyond EOF. An inode is tagged
when speculative preallocation occurs and untagged either via
truncate down or when post-EOF blocks are freed via release or
reclaim.
The tag management is intentionally not aggressive to prefer
simplicity over the complexity of handling all the corner cases
under which post-EOF blocks could be freed (i.e., forward
truncation, fallocate, write error conditions, etc.). This means
that a tagged inode may or may not have post-EOF blocks after a
period of time. The tag is eventually cleared when the inode is
released or reclaimed.
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs')
-rw-r--r-- | fs/xfs/xfs_ag.h | 1 | ||||
-rw-r--r-- | fs/xfs/xfs_icache.c | 62 | ||||
-rw-r--r-- | fs/xfs/xfs_icache.h | 3 | ||||
-rw-r--r-- | fs/xfs/xfs_iomap.c | 8 | ||||
-rw-r--r-- | fs/xfs/xfs_iops.c | 4 | ||||
-rw-r--r-- | fs/xfs/xfs_trace.h | 5 | ||||
-rw-r--r-- | fs/xfs/xfs_vnodeops.c | 2 |
7 files changed, 85 insertions, 0 deletions
diff --git a/fs/xfs/xfs_ag.h b/fs/xfs/xfs_ag.h index 44d65c1..22bd4db 100644 --- a/fs/xfs/xfs_ag.h +++ b/fs/xfs/xfs_ag.h @@ -233,6 +233,7 @@ typedef struct xfs_perag { #define XFS_ICI_NO_TAG (-1) /* special flag for an untagged lookup in xfs_inode_ag_iterator */ #define XFS_ICI_RECLAIM_TAG 0 /* inode is to be reclaimed */ +#define XFS_ICI_EOFBLOCKS_TAG 1 /* inode has blocks beyond EOF */ #define XFS_AG_MAXLEVELS(mp) ((mp)->m_ag_maxlevels) #define XFS_MIN_FREELIST_RAW(bl,cl,mp) \ diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c index 9c8703b..f9afc5f 100644 --- a/fs/xfs/xfs_icache.c +++ b/fs/xfs/xfs_icache.c @@ -1128,3 +1128,65 @@ xfs_reclaim_inodes_count( return reclaimable; } +void +xfs_inode_set_eofblocks_tag( + xfs_inode_t *ip) +{ + struct xfs_mount *mp = ip->i_mount; + struct xfs_perag *pag; + int tagged; + + pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino)); + spin_lock(&pag->pag_ici_lock); + trace_xfs_inode_set_eofblocks_tag(ip); + + tagged = radix_tree_tagged(&pag->pag_ici_root, + XFS_ICI_EOFBLOCKS_TAG); + radix_tree_tag_set(&pag->pag_ici_root, + XFS_INO_TO_AGINO(ip->i_mount, ip->i_ino), + XFS_ICI_EOFBLOCKS_TAG); + if (!tagged) { + /* propagate the eofblocks tag up into the perag radix tree */ + spin_lock(&ip->i_mount->m_perag_lock); + radix_tree_tag_set(&ip->i_mount->m_perag_tree, + XFS_INO_TO_AGNO(ip->i_mount, ip->i_ino), + XFS_ICI_EOFBLOCKS_TAG); + spin_unlock(&ip->i_mount->m_perag_lock); + + trace_xfs_perag_set_eofblocks(ip->i_mount, pag->pag_agno, + -1, _RET_IP_); + } + + spin_unlock(&pag->pag_ici_lock); + xfs_perag_put(pag); +} + +void +xfs_inode_clear_eofblocks_tag( + xfs_inode_t *ip) +{ + struct xfs_mount *mp = ip->i_mount; + struct xfs_perag *pag; + + pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino)); + spin_lock(&pag->pag_ici_lock); + trace_xfs_inode_clear_eofblocks_tag(ip); + + radix_tree_tag_clear(&pag->pag_ici_root, + XFS_INO_TO_AGINO(ip->i_mount, ip->i_ino), + XFS_ICI_EOFBLOCKS_TAG); + if (!radix_tree_tagged(&pag->pag_ici_root, XFS_ICI_EOFBLOCKS_TAG)) { + /* clear the eofblocks tag from the perag radix tree */ + spin_lock(&ip->i_mount->m_perag_lock); + radix_tree_tag_clear(&ip->i_mount->m_perag_tree, + XFS_INO_TO_AGNO(ip->i_mount, ip->i_ino), + XFS_ICI_EOFBLOCKS_TAG); + spin_unlock(&ip->i_mount->m_perag_lock); + trace_xfs_perag_clear_eofblocks(ip->i_mount, pag->pag_agno, + -1, _RET_IP_); + } + + spin_unlock(&pag->pag_ici_lock); + xfs_perag_put(pag); +} + diff --git a/fs/xfs/xfs_icache.h b/fs/xfs/xfs_icache.h index 222e22f..db36130 100644 --- a/fs/xfs/xfs_icache.h +++ b/fs/xfs/xfs_icache.h @@ -35,6 +35,9 @@ void xfs_reclaim_inodes_nr(struct xfs_mount *mp, int nr_to_scan); void xfs_inode_set_reclaim_tag(struct xfs_inode *ip); +void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip); +void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip); + int xfs_sync_inode_grab(struct xfs_inode *ip); int xfs_inode_ag_iterator(struct xfs_mount *mp, int (*execute)(struct xfs_inode *ip, struct xfs_perag *pag, int flags), diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index a066cf1..add06b4 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -41,6 +41,7 @@ #include "xfs_utils.h" #include "xfs_iomap.h" #include "xfs_trace.h" +#include "xfs_icache.h" #define XFS_WRITEIO_ALIGN(mp,off) (((off) >> mp->m_writeio_log) \ @@ -450,6 +451,13 @@ retry: if (!(imap[0].br_startblock || XFS_IS_REALTIME_INODE(ip))) return xfs_alert_fsblock_zero(ip, &imap[0]); + /* + * Tag the inode as speculatively preallocated so we can reclaim this + * space on demand, if necessary. + */ + if (prealloc) + xfs_inode_set_eofblocks_tag(ip); + *ret_imap = imap[0]; return 0; } diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c index 4e00cf0..81f5c49 100644 --- a/fs/xfs/xfs_iops.c +++ b/fs/xfs/xfs_iops.c @@ -38,6 +38,7 @@ #include "xfs_vnodeops.h" #include "xfs_inode_item.h" #include "xfs_trace.h" +#include "xfs_icache.h" #include <linux/capability.h> #include <linux/xattr.h> @@ -854,6 +855,9 @@ xfs_setattr_size( * and do not wait the usual (long) time for writeout. */ xfs_iflags_set(ip, XFS_ITRUNCATED); + + /* A truncate down always removes post-EOF blocks. */ + xfs_inode_clear_eofblocks_tag(ip); } if (mask & ATTR_CTIME) { diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h index 7d36ccf..6f46e03 100644 --- a/fs/xfs/xfs_trace.h +++ b/fs/xfs/xfs_trace.h @@ -130,6 +130,8 @@ DEFINE_PERAG_REF_EVENT(xfs_perag_get_tag); DEFINE_PERAG_REF_EVENT(xfs_perag_put); DEFINE_PERAG_REF_EVENT(xfs_perag_set_reclaim); DEFINE_PERAG_REF_EVENT(xfs_perag_clear_reclaim); +DEFINE_PERAG_REF_EVENT(xfs_perag_set_eofblocks); +DEFINE_PERAG_REF_EVENT(xfs_perag_clear_eofblocks); TRACE_EVENT(xfs_attr_list_node_descend, TP_PROTO(struct xfs_attr_list_context *ctx, @@ -585,6 +587,9 @@ DEFINE_INODE_EVENT(xfs_update_time); DEFINE_INODE_EVENT(xfs_dquot_dqalloc); DEFINE_INODE_EVENT(xfs_dquot_dqdetach); +DEFINE_INODE_EVENT(xfs_inode_set_eofblocks_tag); +DEFINE_INODE_EVENT(xfs_inode_clear_eofblocks_tag); + DECLARE_EVENT_CLASS(xfs_iref_class, TP_PROTO(struct xfs_inode *ip, unsigned long caller_ip), TP_ARGS(ip, caller_ip), diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index 2ee1f49..e6e1d11 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -238,6 +238,8 @@ xfs_free_eofblocks( } else { error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); + if (!error) + xfs_inode_clear_eofblocks_tag(ip); } xfs_iunlock(ip, XFS_ILOCK_EXCL); |