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authorChristoph Hellwig <hch@infradead.org>2011-05-20 13:45:32 +0000
committerAlex Elder <aelder@sgi.com>2011-05-24 11:17:13 -0500
commite84661aa84e2e003738563f65155d4f12dc474e7 (patch)
tree9f9b6d2fac2048c5fb8c2728bcf2930435890d4f /fs/xfs/xfs_log_cil.c
parentbf59170a66bc3eaf3ee513aa6ce9774aa2ab5188 (diff)
xfs: add online discard support
Now that we have reliably tracking of deleted extents in a transaction we can easily implement "online" discard support which calls blkdev_issue_discard once a transaction commits. The actual discard is a two stage operation as we first have to mark the busy extent as not available for reuse before we can start the actual discard. Note that we don't bother supporting discard for the non-delaylog mode. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_log_cil.c')
-rw-r--r--fs/xfs/xfs_log_cil.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/fs/xfs/xfs_log_cil.c b/fs/xfs/xfs_log_cil.c
index 7d56e88a3f0e..c7755d5a5fbe 100644
--- a/fs/xfs/xfs_log_cil.c
+++ b/fs/xfs/xfs_log_cil.c
@@ -29,6 +29,7 @@
#include "xfs_mount.h"
#include "xfs_error.h"
#include "xfs_alloc.h"
+#include "xfs_discard.h"
/*
* Perform initial CIL structure initialisation. If the CIL is not
@@ -361,18 +362,28 @@ xlog_cil_committed(
int abort)
{
struct xfs_cil_ctx *ctx = args;
+ struct xfs_mount *mp = ctx->cil->xc_log->l_mp;
xfs_trans_committed_bulk(ctx->cil->xc_log->l_ailp, ctx->lv_chain,
ctx->start_lsn, abort);
xfs_alloc_busy_sort(&ctx->busy_extents);
- xfs_alloc_busy_clear(ctx->cil->xc_log->l_mp, &ctx->busy_extents);
+ xfs_alloc_busy_clear(mp, &ctx->busy_extents,
+ (mp->m_flags & XFS_MOUNT_DISCARD) && !abort);
spin_lock(&ctx->cil->xc_cil_lock);
list_del(&ctx->committing);
spin_unlock(&ctx->cil->xc_cil_lock);
xlog_cil_free_logvec(ctx->lv_chain);
+
+ if (!list_empty(&ctx->busy_extents)) {
+ ASSERT(mp->m_flags & XFS_MOUNT_DISCARD);
+
+ xfs_discard_extents(mp, &ctx->busy_extents);
+ xfs_alloc_busy_clear(mp, &ctx->busy_extents, false);
+ }
+
kmem_free(ctx);
}