Subject: [merged] ocfs2-lighten-up-allocate-transaction.patch removed from -mm tree To: younger.liu@xxxxxxxxxx,jeff.liu@xxxxxxxxxx,jlbec@xxxxxxxxxxxx,mfasheh@xxxxxxxx,mm-commits@xxxxxxxxxxxxxxx From: akpm@xxxxxxxxxxxxxxxxxxxx Date: Thu, 12 Sep 2013 12:41:19 -0700 The patch titled Subject: ocfs2: lighten up allocate transaction has been removed from the -mm tree. Its filename was ocfs2-lighten-up-allocate-transaction.patch This patch was dropped because it was merged into mainline or a subsystem tree ------------------------------------------------------ From: Younger Liu <younger.liu@xxxxxxxxxx> Subject: ocfs2: lighten up allocate transaction The issue scenario is as following: When fallocating a very large disk space for a small file, __ocfs2_extend_allocation attempts to get a very large transaction. For some journal sizes, there may be not enough room for this transaction, and the fallocate will fail. The patch below extends & restarts the transaction as necessary while allocating space, and should work with even the smallest journal. This patch refers ext4 resize. Test: # mkfs.ocfs2 -b 4K -C 32K -T datafiles /dev/sdc ...(jounral size is 32M) # mount.ocfs2 /dev/sdc /mnt/ocfs2/ # touch /mnt/ocfs2/1.log # fallocate -o 0 -l 400G /mnt/ocfs2/1.log fallocate: /mnt/ocfs2/1.log: fallocate failed: Cannot allocate memory # tail -f /var/log/messages [ 7372.278591] JBD: fallocate wants too many credits (2051 > 2048) [ 7372.278597] (fallocate,6438,0):__ocfs2_extend_allocation:709 ERROR: status = -12 [ 7372.278603] (fallocate,6438,0):ocfs2_allocate_unwritten_extents:1504 ERROR: status = -12 [ 7372.278607] (fallocate,6438,0):__ocfs2_change_file_space:1955 ERROR: status = -12 ^C With this patch, the test works well. Signed-off-by: Younger Liu <younger.liu@xxxxxxxxxx> Cc: Jie Liu <jeff.liu@xxxxxxxxxx> Cc: Joel Becker <jlbec@xxxxxxxxxxxx> Cc: Mark Fasheh <mfasheh@xxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- fs/ocfs2/file.c | 6 +----- fs/ocfs2/journal.c | 35 +++++++++++++++++++++++++++++++++++ fs/ocfs2/journal.h | 11 +++++++++++ fs/ocfs2/ocfs2_trace.h | 2 ++ 4 files changed, 49 insertions(+), 5 deletions(-) diff -puN fs/ocfs2/file.c~ocfs2-lighten-up-allocate-transaction fs/ocfs2/file.c --- a/fs/ocfs2/file.c~ocfs2-lighten-up-allocate-transaction +++ a/fs/ocfs2/file.c @@ -671,11 +671,7 @@ restarted_transaction: } else { BUG_ON(why != RESTART_TRANS); - /* TODO: This can be more intelligent. */ - credits = ocfs2_calc_extend_credits(osb->sb, - &fe->id2.i_list, - clusters_to_add); - status = ocfs2_extend_trans(handle, credits); + status = ocfs2_allocate_extend_trans(handle, 1); if (status < 0) { /* handle still has to be committed at * this point. */ diff -puN fs/ocfs2/journal.c~ocfs2-lighten-up-allocate-transaction fs/ocfs2/journal.c --- a/fs/ocfs2/journal.c~ocfs2-lighten-up-allocate-transaction +++ a/fs/ocfs2/journal.c @@ -455,6 +455,41 @@ bail: return status; } +/* + * If we have fewer than thresh credits, extend by OCFS2_MAX_TRANS_DATA. + * If that fails, restart the transaction & regain write access for the + * buffer head which is used for metadata modifications. + * Taken from Ext4: extend_or_restart_transaction() + */ +int ocfs2_allocate_extend_trans(handle_t *handle, int thresh) +{ + int status, old_nblks; + + BUG_ON(!handle); + + old_nblks = handle->h_buffer_credits; + trace_ocfs2_allocate_extend_trans(old_nblks, thresh); + + if (old_nblks < thresh) + return 0; + + status = jbd2_journal_extend(handle, OCFS2_MAX_TRANS_DATA); + if (status < 0) { + mlog_errno(status); + goto bail; + } + + if (status > 0) { + status = jbd2_journal_restart(handle, OCFS2_MAX_TRANS_DATA); + if (status < 0) + mlog_errno(status); + } + +bail: + return status; +} + + struct ocfs2_triggers { struct jbd2_buffer_trigger_type ot_triggers; int ot_offset; diff -puN fs/ocfs2/journal.h~ocfs2-lighten-up-allocate-transaction fs/ocfs2/journal.h --- a/fs/ocfs2/journal.h~ocfs2-lighten-up-allocate-transaction +++ a/fs/ocfs2/journal.h @@ -258,6 +258,17 @@ handle_t *ocfs2_start_trans(struct int ocfs2_commit_trans(struct ocfs2_super *osb, handle_t *handle); int ocfs2_extend_trans(handle_t *handle, int nblocks); +int ocfs2_allocate_extend_trans(handle_t *handle, + int thresh); + +/* + * Define an arbitrary limit for the amount of data we will anticipate + * writing to any given transaction. For unbounded transactions such as + * fallocate(2) we can write more than this, but we always + * start off at the maximum transaction size and grow the transaction + * optimistically as we go. + */ +#define OCFS2_MAX_TRANS_DATA 64U /* * Create access is for when we get a newly created buffer and we're diff -puN fs/ocfs2/ocfs2_trace.h~ocfs2-lighten-up-allocate-transaction fs/ocfs2/ocfs2_trace.h --- a/fs/ocfs2/ocfs2_trace.h~ocfs2-lighten-up-allocate-transaction +++ a/fs/ocfs2/ocfs2_trace.h @@ -2579,6 +2579,8 @@ DEFINE_OCFS2_INT_INT_EVENT(ocfs2_extend_ DEFINE_OCFS2_INT_EVENT(ocfs2_extend_trans_restart); +DEFINE_OCFS2_INT_INT_EVENT(ocfs2_allocate_extend_trans); + DEFINE_OCFS2_ULL_ULL_UINT_UINT_EVENT(ocfs2_journal_access); DEFINE_OCFS2_ULL_EVENT(ocfs2_journal_dirty); _ Patches currently in -mm which might be from younger.liu@xxxxxxxxxx are origin.patch ocfs2-should-call-ocfs2_journal_access_di-before-ocfs2_delete_entry-in-ocfs2_orphan_del.patch ocfs2-fix-issue-that-ocfs2_setattr-does-not-deal-with-new_i_size==i_size.patch ocfs2-update-inode-size-after-zeronig-the-hole.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html