From 9f27889f3a96ff356ac92688cc0c4be3935ae3af Mon Sep 17 00:00:00 2001 From: Carlos Maiolino Date: Wed, 6 Apr 2016 09:46:30 +1000 Subject: [PATCH 1/3] xfs: Add caller function output to xfs_log_force tracepoint I had sent this patch yesterday, but for some reason it didn't reach xfs list, sending again. Output the caller of xfs_log_force might be useful when tracing log checkpoint problems without the need to build kernel with DEBUG. Signed-off-by: Carlos Maiolino Reviewed-by: Brian Foster Signed-off-by: Dave Chinner --- fs/xfs/xfs_log.c | 4 ++-- fs/xfs/xfs_trace.h | 10 ++++++---- 2 files changed, 8 insertions(+), 6 deletions(-) diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index b49ccf5c1d756..8c08015bc094b 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -3378,7 +3378,7 @@ xfs_log_force( { int error; - trace_xfs_log_force(mp, 0); + trace_xfs_log_force(mp, 0, _RET_IP_); error = _xfs_log_force(mp, flags, NULL); if (error) xfs_warn(mp, "%s: error %d returned.", __func__, error); @@ -3527,7 +3527,7 @@ xfs_log_force_lsn( { int error; - trace_xfs_log_force(mp, lsn); + trace_xfs_log_force(mp, lsn, _RET_IP_); error = _xfs_log_force_lsn(mp, lsn, flags, NULL); if (error) xfs_warn(mp, "%s: error %d returned.", __func__, error); diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h index c8d58426008ed..384bb17914814 100644 --- a/fs/xfs/xfs_trace.h +++ b/fs/xfs/xfs_trace.h @@ -1053,19 +1053,21 @@ DECLARE_EVENT_CLASS(xfs_log_item_class, ) TRACE_EVENT(xfs_log_force, - TP_PROTO(struct xfs_mount *mp, xfs_lsn_t lsn), - TP_ARGS(mp, lsn), + TP_PROTO(struct xfs_mount *mp, xfs_lsn_t lsn, unsigned long caller_ip), + TP_ARGS(mp, lsn, caller_ip), TP_STRUCT__entry( __field(dev_t, dev) __field(xfs_lsn_t, lsn) + __field(unsigned long, caller_ip) ), TP_fast_assign( __entry->dev = mp->m_super->s_dev; __entry->lsn = lsn; + __entry->caller_ip = caller_ip; ), - TP_printk("dev %d:%d lsn 0x%llx", + TP_printk("dev %d:%d lsn 0x%llx caller %ps", MAJOR(__entry->dev), MINOR(__entry->dev), - __entry->lsn) + __entry->lsn, (void *)__entry->caller_ip) ) #define DEFINE_LOG_ITEM_EVENT(name) \ From 664b60f6babc98ee03c2ff15b9482cc8c5e15a83 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 6 Apr 2016 09:47:01 +1000 Subject: [PATCH 2/3] xfs: improve kmem_realloc Use krealloc to implement our realloc function. This helps to avoid new allocations if we are still in the slab bucket. At least for the bmap btree root that's actually the common case. This also allows removing the now unused oldsize argument. Signed-off-by: Christoph Hellwig Reviewed-by: Brian Foster Signed-off-by: Dave Chinner --- fs/xfs/kmem.c | 26 +++++++++++++++----------- fs/xfs/kmem.h | 2 +- fs/xfs/libxfs/xfs_inode_fork.c | 10 +++------- fs/xfs/xfs_log_recover.c | 2 +- fs/xfs/xfs_mount.c | 1 - 5 files changed, 20 insertions(+), 21 deletions(-) diff --git a/fs/xfs/kmem.c b/fs/xfs/kmem.c index 686ba6fb20ddc..339c696bbc018 100644 --- a/fs/xfs/kmem.c +++ b/fs/xfs/kmem.c @@ -93,19 +93,23 @@ kmem_zalloc_large(size_t size, xfs_km_flags_t flags) } void * -kmem_realloc(const void *ptr, size_t newsize, size_t oldsize, - xfs_km_flags_t flags) +kmem_realloc(const void *old, size_t newsize, xfs_km_flags_t flags) { - void *new; + int retries = 0; + gfp_t lflags = kmem_flags_convert(flags); + void *ptr; - new = kmem_alloc(newsize, flags); - if (ptr) { - if (new) - memcpy(new, ptr, - ((oldsize < newsize) ? oldsize : newsize)); - kmem_free(ptr); - } - return new; + do { + ptr = krealloc(old, newsize, lflags); + if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP))) + return ptr; + if (!(++retries % 100)) + xfs_err(NULL, + "%s(%u) possible memory allocation deadlock size %zu in %s (mode:0x%x)", + current->comm, current->pid, + newsize, __func__, lflags); + congestion_wait(BLK_RW_ASYNC, HZ/50); + } while (1); } void * diff --git a/fs/xfs/kmem.h b/fs/xfs/kmem.h index d1c66e465ca56..689f746224e7a 100644 --- a/fs/xfs/kmem.h +++ b/fs/xfs/kmem.h @@ -62,7 +62,7 @@ kmem_flags_convert(xfs_km_flags_t flags) extern void *kmem_alloc(size_t, xfs_km_flags_t); extern void *kmem_zalloc_large(size_t size, xfs_km_flags_t); -extern void *kmem_realloc(const void *, size_t, size_t, xfs_km_flags_t); +extern void *kmem_realloc(const void *, size_t, xfs_km_flags_t); static inline void kmem_free(const void *ptr) { kvfree(ptr); diff --git a/fs/xfs/libxfs/xfs_inode_fork.c b/fs/xfs/libxfs/xfs_inode_fork.c index 11faf7df14c80..1c842dce44b63 100644 --- a/fs/xfs/libxfs/xfs_inode_fork.c +++ b/fs/xfs/libxfs/xfs_inode_fork.c @@ -516,7 +516,6 @@ xfs_iroot_realloc( new_max = cur_max + rec_diff; new_size = XFS_BMAP_BROOT_SPACE_CALC(mp, new_max); ifp->if_broot = kmem_realloc(ifp->if_broot, new_size, - XFS_BMAP_BROOT_SPACE_CALC(mp, cur_max), KM_SLEEP | KM_NOFS); op = (char *)XFS_BMAP_BROOT_PTR_ADDR(mp, ifp->if_broot, 1, ifp->if_broot_bytes); @@ -660,7 +659,6 @@ xfs_idata_realloc( ifp->if_u1.if_data = kmem_realloc(ifp->if_u1.if_data, real_size, - ifp->if_real_bytes, KM_SLEEP | KM_NOFS); } } else { @@ -1376,8 +1374,7 @@ xfs_iext_realloc_direct( if (rnew_size != ifp->if_real_bytes) { ifp->if_u1.if_extents = kmem_realloc(ifp->if_u1.if_extents, - rnew_size, - ifp->if_real_bytes, KM_NOFS); + rnew_size, KM_NOFS); } if (rnew_size > ifp->if_real_bytes) { memset(&ifp->if_u1.if_extents[ifp->if_bytes / @@ -1461,9 +1458,8 @@ xfs_iext_realloc_indirect( if (new_size == 0) { xfs_iext_destroy(ifp); } else { - ifp->if_u1.if_ext_irec = (xfs_ext_irec_t *) - kmem_realloc(ifp->if_u1.if_ext_irec, - new_size, size, KM_NOFS); + ifp->if_u1.if_ext_irec = + kmem_realloc(ifp->if_u1.if_ext_irec, new_size, KM_NOFS); } } diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 396565f432476..bf6e807036136 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -3843,7 +3843,7 @@ xlog_recover_add_to_cont_trans( old_ptr = item->ri_buf[item->ri_cnt-1].i_addr; old_len = item->ri_buf[item->ri_cnt-1].i_len; - ptr = kmem_realloc(old_ptr, len+old_len, old_len, KM_SLEEP); + ptr = kmem_realloc(old_ptr, len + old_len, KM_SLEEP); memcpy(&ptr[old_len], dp, len); item->ri_buf[item->ri_cnt-1].i_len += len; item->ri_buf[item->ri_cnt-1].i_addr = ptr; diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index 536a0ee9cd5af..654799f716fc3 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -89,7 +89,6 @@ xfs_uuid_mount( if (hole < 0) { xfs_uuid_table = kmem_realloc(xfs_uuid_table, (xfs_uuid_table_size + 1) * sizeof(*xfs_uuid_table), - xfs_uuid_table_size * sizeof(*xfs_uuid_table), KM_SLEEP); hole = xfs_uuid_table_size++; } From 6e3e6d55e51774ec7cfc24975749bbddb28a9051 Mon Sep 17 00:00:00 2001 From: Eryu Guan Date: Wed, 6 Apr 2016 09:47:21 +1000 Subject: [PATCH 3/3] xfs: mute some sparse warnings These three warnings are fixed: fs/xfs/xfs_inode.c:1033:44: warning: Using plain integer as NULL pointer fs/xfs/xfs_inode_item.c:525:20: warning: context imbalance in 'xfs_inode_item_push' - unexpected unlock fs/xfs/xfs_dquot.c:696:1: warning: symbol 'xfs_dq_get_next_id' was not declared. Should it be static? Signed-off-by: Eryu Guan Reviewed-by: Christoph Hellwig Signed-off-by: Dave Chinner --- fs/xfs/xfs_dquot.c | 2 +- fs/xfs/xfs_inode.c | 2 +- fs/xfs/xfs_inode_item.c | 2 ++ 3 files changed, 4 insertions(+), 2 deletions(-) diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c index 316b2a1bdba5f..8f51370c95c4b 100644 --- a/fs/xfs/xfs_dquot.c +++ b/fs/xfs/xfs_dquot.c @@ -692,7 +692,7 @@ xfs_qm_dqread( * end of the chunk, skip ahead to first id in next allocated chunk * using the SEEK_DATA interface. */ -int +static int xfs_dq_get_next_id( xfs_mount_t *mp, uint type, diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 96f606deee313..1445a99a6868b 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -1030,7 +1030,7 @@ xfs_dir_ialloc( tp->t_flags &= ~(XFS_TRANS_DQ_DIRTY); } - code = xfs_trans_roll(&tp, 0); + code = xfs_trans_roll(&tp, NULL); if (committed != NULL) *committed = 1; diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c index c48b5b18d771f..d02cbab18f458 100644 --- a/fs/xfs/xfs_inode_item.c +++ b/fs/xfs/xfs_inode_item.c @@ -479,6 +479,8 @@ STATIC uint xfs_inode_item_push( struct xfs_log_item *lip, struct list_head *buffer_list) + __releases(&lip->li_ailp->xa_lock) + __acquires(&lip->li_ailp->xa_lock) { struct xfs_inode_log_item *iip = INODE_ITEM(lip); struct xfs_inode *ip = iip->ili_inode;