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author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-11 11:28:34 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-11 11:28:34 -0800 |
commit | 498f7f505dc79934c878c7667840c50c64f232fc (patch) | |
tree | 67eca6dcb6fe76ec3d2bdef5e3102591fe957776 /fs/ocfs2/aops.c | |
parent | 0969d11e201b82d30a158ccdb3aca67a7b845613 (diff) | |
parent | d6351db2073315ddebac72cc1935e912f60f86e0 (diff) | |
download | linux-498f7f505dc79934c878c7667840c50c64f232fc.tar.bz2 |
Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2: (22 commits)
MAINTAINERS: Update Joel Becker's email address
ocfs2: Remove unused truncate function from alloc.c
ocfs2/cluster: dereferencing before checking in nst_seq_show()
ocfs2: fix build for OCFS2_FS_STATS not enabled
ocfs2/cluster: Show o2net timing statistics
ocfs2/cluster: Track process message timing stats for each socket
ocfs2/cluster: Track send message timing stats for each socket
ocfs2/cluster: Use ktime instead of timeval in struct o2net_sock_container
ocfs2/cluster: Replace timeval with ktime in struct o2net_send_tracking
ocfs2: Add DEBUG_FS dependency
ocfs2/dlm: Hard code the values for enums
ocfs2/dlm: Minor cleanup
ocfs2/dlm: Cleanup dlmdebug.c
ocfs2: Release buffer_head in case of error in ocfs2_double_lock.
ocfs2/cluster: Pin the local node when o2hb thread starts
ocfs2/cluster: Show pin state for each o2hb region
ocfs2/cluster: Pin/unpin o2hb regions
ocfs2/cluster: Remove dropped region from o2hb quorum region bitmap
ocfs2/cluster: Pin the remote node item in configfs
ocfs2/dlm: make existing convertion precedent over new lock
...
Diffstat (limited to 'fs/ocfs2/aops.c')
-rw-r--r-- | fs/ocfs2/aops.c | 59 |
1 files changed, 58 insertions, 1 deletions
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c index 0d7c5540ad66..1fbb0e20131b 100644 --- a/fs/ocfs2/aops.c +++ b/fs/ocfs2/aops.c @@ -1630,6 +1630,43 @@ static int ocfs2_zero_tail(struct inode *inode, struct buffer_head *di_bh, return ret; } +/* + * Try to flush truncate logs if we can free enough clusters from it. + * As for return value, "< 0" means error, "0" no space and "1" means + * we have freed enough spaces and let the caller try to allocate again. + */ +static int ocfs2_try_to_free_truncate_log(struct ocfs2_super *osb, + unsigned int needed) +{ + tid_t target; + int ret = 0; + unsigned int truncated_clusters; + + mutex_lock(&osb->osb_tl_inode->i_mutex); + truncated_clusters = osb->truncated_clusters; + mutex_unlock(&osb->osb_tl_inode->i_mutex); + + /* + * Check whether we can succeed in allocating if we free + * the truncate log. + */ + if (truncated_clusters < needed) + goto out; + + ret = ocfs2_flush_truncate_log(osb); + if (ret) { + mlog_errno(ret); + goto out; + } + + if (jbd2_journal_start_commit(osb->journal->j_journal, &target)) { + jbd2_log_wait_commit(osb->journal->j_journal, target); + ret = 1; + } +out: + return ret; +} + int ocfs2_write_begin_nolock(struct file *filp, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, @@ -1637,7 +1674,7 @@ int ocfs2_write_begin_nolock(struct file *filp, struct buffer_head *di_bh, struct page *mmap_page) { int ret, cluster_of_pages, credits = OCFS2_INODE_UPDATE_CREDITS; - unsigned int clusters_to_alloc, extents_to_split; + unsigned int clusters_to_alloc, extents_to_split, clusters_need = 0; struct ocfs2_write_ctxt *wc; struct inode *inode = mapping->host; struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); @@ -1646,7 +1683,9 @@ int ocfs2_write_begin_nolock(struct file *filp, struct ocfs2_alloc_context *meta_ac = NULL; handle_t *handle; struct ocfs2_extent_tree et; + int try_free = 1, ret1; +try_again: ret = ocfs2_alloc_write_ctxt(&wc, osb, pos, len, di_bh); if (ret) { mlog_errno(ret); @@ -1681,6 +1720,7 @@ int ocfs2_write_begin_nolock(struct file *filp, mlog_errno(ret); goto out; } else if (ret == 1) { + clusters_need = wc->w_clen; ret = ocfs2_refcount_cow(inode, filp, di_bh, wc->w_cpos, wc->w_clen, UINT_MAX); if (ret) { @@ -1695,6 +1735,7 @@ int ocfs2_write_begin_nolock(struct file *filp, mlog_errno(ret); goto out; } + clusters_need += clusters_to_alloc; di = (struct ocfs2_dinode *)wc->w_di_bh->b_data; @@ -1817,6 +1858,22 @@ out: ocfs2_free_alloc_context(data_ac); if (meta_ac) ocfs2_free_alloc_context(meta_ac); + + if (ret == -ENOSPC && try_free) { + /* + * Try to free some truncate log so that we can have enough + * clusters to allocate. + */ + try_free = 0; + + ret1 = ocfs2_try_to_free_truncate_log(osb, clusters_need); + if (ret1 == 1) + goto try_again; + + if (ret1 < 0) + mlog_errno(ret1); + } + return ret; } |