From 13538b8e46022b6a3721cda097fe3e0d91f16959 Mon Sep 17 00:00:00 2001 From: Steven Whitehouse Date: Wed, 22 Feb 2006 11:15:03 +0000 Subject: [GFS2] Add list empty test to databuf_lo_add Heinz had spotted that I'd forgotten to test in databuf_lo_add() that the data buffer in question hadn't already been added to the list. This was causing an infinite loop later on in the "before commit" routine. This means that GFS2 is now ready to be tested by everybody. Signed-off-by: Steven Whitehouse --- fs/gfs2/lops.c | 33 ++++++++------------------------- 1 file changed, 8 insertions(+), 25 deletions(-) (limited to 'fs/gfs2/lops.c') diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c index 5e7e7d91fc5e..ef39fb2e7234 100644 --- a/fs/gfs2/lops.c +++ b/fs/gfs2/lops.c @@ -291,7 +291,7 @@ static void revoke_lo_before_commit(struct gfs2_sbd *sdp) while (!list_empty(head)) { rv = list_entry(head->next, struct gfs2_revoke, rv_le.le_list); - list_del(&rv->rv_le.le_list); + list_del_init(&rv->rv_le.le_list); sdp->sd_log_num_revoke--; if (offset + sizeof(uint64_t) > sdp->sd_sb.sb_bsize) { @@ -460,10 +460,12 @@ static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) gfs2_pin(sdp, bd->bd_bh); } gfs2_log_lock(sdp); - if (ip->i_di.di_flags & GFS2_DIF_JDATA) - sdp->sd_log_num_jdata++; - sdp->sd_log_num_databuf++; - list_add(&le->le_list, &sdp->sd_log_le_databuf); + if (!list_empty(&le->le_list)) { + if (ip->i_di.di_flags & GFS2_DIF_JDATA) + sdp->sd_log_num_jdata++; + sdp->sd_log_num_databuf++; + list_add(&le->le_list, &sdp->sd_log_le_databuf); + } gfs2_log_unlock(sdp); } @@ -503,25 +505,21 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp) unsigned int total_jdata = sdp->sd_log_num_jdata; unsigned int num, n; __be64 *ptr = NULL; - unsigned i; offset += (2*sizeof(__be64) - 1); offset &= ~(2*sizeof(__be64) - 1); limit = (sdp->sd_sb.sb_bsize - offset)/sizeof(__be64); - /* printk(KERN_INFO "totals: jdata=%u dbuf=%u\n", total_jdata, total_dbuf); */ /* * Start writing ordered buffers, write journaled buffers * into the log along with a header */ gfs2_log_lock(sdp); - /* printk(KERN_INFO "locked in lops databuf_before_commit\n"); */ bd2 = bd1 = list_prepare_entry(bd1, &sdp->sd_log_le_databuf, bd_le.le_list); while(total_dbuf) { num = total_jdata; if (num > limit) num = limit; - /* printk(KERN_INFO "total_dbuf=%u num=%u\n", total_dbuf, num); */ n = 0; i = 0; list_for_each_entry_safe_continue(bd1, bdt, &sdp->sd_log_le_databuf, bd_le.le_list) { @@ -542,21 +540,12 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp) gfs2_log_lock(sdp); } brelse(bd1->bd_bh); - /* printk(KERN_INFO "db write %p\n", bd1); */ - if (++i > 100000) { - printk(KERN_INFO "looping bd1=%p bdt=%p eol=%p started=%p\n", bd1, bdt, &sdp->sd_log_le_databuf, &started); - dump_stack(); - BUG(); - } continue; } - /* printk(KERN_INFO "db skip\n"); */ continue; } else if (bd1->bd_bh) { /* A journaled buffer */ int magic; gfs2_log_unlock(sdp); - printk(KERN_INFO "journaled buffer %p\n", bd1->bd_bh); - printk(KERN_INFO "%lu %u %p %p\n", bd1->bd_bh->b_blocknr, bd1->bd_bh->b_size, bd1->bd_bh->b_data, bd1->bd_bh->b_page); if (!bh) { bh = gfs2_log_get_buf(sdp); ld = (struct gfs2_log_descriptor *)bh->b_data; @@ -570,12 +559,9 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp) ld->ld_data2 = cpu_to_be32(0); memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); } - /* printk(KERN_INFO "check_magic\n"); */ magic = gfs2_check_magic(bd1->bd_bh); - /* printk(KERN_INFO "write data\n"); */ *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); *ptr++ = cpu_to_be64((__u64)magic); - /* printk(KERN_INFO "mark escaped or not\n"); */ clear_buffer_escaped(bd1->bd_bh); if (unlikely(magic != 0)) set_buffer_escaped(bd1->bd_bh); @@ -591,7 +577,6 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp) bh = NULL; } n = 0; - /* printk(KERN_INFO "totals2: jdata=%u dbuf=%u\n", total_jdata, total_dbuf); */ gfs2_log_lock(sdp); list_for_each_entry_continue(bd2, &sdp->sd_log_le_databuf, bd_le.le_list) { if (!bd2->bd_bh) @@ -621,14 +606,13 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp) } gfs2_log_unlock(sdp); - /* printk(KERN_INFO "wait on ordered data buffers\n"); */ /* Wait on all ordered buffers */ while (!list_empty(&started)) { + gfs2_log_lock(sdp); bd1 = list_entry(started.next, struct gfs2_bufdata, bd_le.le_list); list_del(&bd1->bd_le.le_list); sdp->sd_log_num_databuf--; - gfs2_log_lock(sdp); bh = bd1->bd_bh; if (bh) { set_v2bd(bh, NULL); @@ -641,7 +625,6 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp) kfree(bd1); } - /* printk(KERN_INFO "sd_log_num_databuf %u sd_log_num_jdata %u\n", sdp->sd_log_num_databuf, sdp->sd_log_num_jdata); */ /* We've removed all the ordered write bufs here, so only jdata left */ gfs2_assert_warn(sdp, sdp->sd_log_num_databuf == sdp->sd_log_num_jdata); } -- cgit v1.2.2