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From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: sandeen@sandeen.net, darrick.wong@oracle.com
Cc: linux-xfs@vger.kernel.org
Subject: [PATCH 06/11] xfs_scrub: reduce fsmap activity for media errors
Date: Mon, 26 Aug 2019 14:31:46 -0700	[thread overview]
Message-ID: <156685510636.2843133.11157951829193779296.stgit@magnolia> (raw)
In-Reply-To: <156685506615.2843133.16536353613627426823.stgit@magnolia>

From: Darrick J. Wong <darrick.wong@oracle.com>

Right now we rather foolishly query the fsmap data for every single
media error that we find.  This is a silly waste of time since we
have yet to combine adjacent bad blocks into bad extents, so move the
rmap query until after we've constructed the bad block bitmap data.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 libfrog/bitmap.c |   15 +++--
 scrub/phase6.c   |  148 ++++++++++++++++++++++++++++++++++++++----------------
 2 files changed, 112 insertions(+), 51 deletions(-)


diff --git a/libfrog/bitmap.c b/libfrog/bitmap.c
index cc5d99f1..c3aa2545 100644
--- a/libfrog/bitmap.c
+++ b/libfrog/bitmap.c
@@ -317,7 +317,6 @@ bitmap_clear(
 }
 #endif
 
-#ifdef DEBUG
 /* Iterate the set regions of this bitmap. */
 int
 bitmap_iterate(
@@ -327,20 +326,22 @@ bitmap_iterate(
 {
 	struct avl64node	*node;
 	struct bitmap_node	*ext;
-	int			error = 0;
+	int			ret;
+
+	ret = pthread_mutex_lock(&bmap->bt_lock);
+	if (ret)
+		return ret;
 
-	pthread_mutex_lock(&bmap->bt_lock);
 	avl_for_each(bmap->bt_tree, node) {
 		ext = container_of(node, struct bitmap_node, btn_node);
-		error = fn(ext->btn_start, ext->btn_length, arg);
-		if (error)
+		ret = fn(ext->btn_start, ext->btn_length, arg);
+		if (ret)
 			break;
 	}
 	pthread_mutex_unlock(&bmap->bt_lock);
 
-	return error;
+	return ret;
 }
-#endif
 
 /* Iterate the set regions of part of this bitmap. */
 int
diff --git a/scrub/phase6.c b/scrub/phase6.c
index f5b57185..33ed75cc 100644
--- a/scrub/phase6.c
+++ b/scrub/phase6.c
@@ -341,27 +341,9 @@ xfs_report_verify_dirent(
 	return moveon;
 }
 
-/* Given bad extent lists for the data & rtdev, find bad files. */
-static bool
-xfs_report_verify_errors(
-	struct scrub_ctx		*ctx,
-	struct media_verify_state	*vs)
-{
-	bool				moveon;
-
-	/* Scan the directory tree to get file paths. */
-	moveon = scan_fs_tree(ctx, xfs_report_verify_dir,
-			xfs_report_verify_dirent, vs);
-	if (!moveon)
-		return false;
-
-	/* Scan for unlinked files. */
-	return xfs_scan_all_inodes(ctx, xfs_report_verify_inode, vs);
-}
-
 /* Report an IO error resulting from read-verify based off getfsmap. */
 static bool
-xfs_check_rmap_error_report(
+ioerr_fsmap_report(
 	struct scrub_ctx	*ctx,
 	const char		*descr,
 	struct fsmap		*map,
@@ -409,12 +391,31 @@ xfs_check_rmap_error_report(
 	return true;
 }
 
+static struct bitmap *
+bitmap_for_disk(
+	struct scrub_ctx		*ctx,
+	struct disk			*disk,
+	struct media_verify_state	*vs)
+{
+	dev_t				dev = xfs_disk_to_dev(ctx, disk);
+
+	/*
+	 * If we don't have parent pointers, save the bad extent for
+	 * later rescanning.
+	 */
+	if (dev == ctx->fsinfo.fs_datadev)
+		return vs->d_bad;
+	else if (dev == ctx->fsinfo.fs_rtdev)
+		return vs->r_bad;
+	return NULL;
+}
+
 /*
  * Remember a read error for later, and see if rmap will tell us about the
  * owner ahead of time.
  */
 static void
-xfs_check_rmap_ioerr(
+remember_ioerr(
 	struct scrub_ctx		*ctx,
 	struct disk			*disk,
 	uint64_t			start,
@@ -422,32 +423,39 @@ xfs_check_rmap_ioerr(
 	int				error,
 	void				*arg)
 {
-	struct fsmap			keys[2];
-	char				descr[DESCR_BUFSZ];
 	struct media_verify_state	*vs = arg;
 	struct bitmap			*tree;
-	dev_t				dev;
 	int				ret;
 
-	dev = xfs_disk_to_dev(ctx, disk);
+	tree = bitmap_for_disk(ctx, disk, vs);
+	if (!tree)
+		return;
 
-	/*
-	 * If we don't have parent pointers, save the bad extent for
-	 * later rescanning.
-	 */
-	if (dev == ctx->fsinfo.fs_datadev)
-		tree = vs->d_bad;
-	else if (dev == ctx->fsinfo.fs_rtdev)
-		tree = vs->r_bad;
-	else
-		tree = NULL;
-	if (tree) {
-		ret = bitmap_set(tree, start, length);
-		if (ret)
-			str_liberror(ctx, ret, _("setting bad block bitmap"));
-	}
+	ret = bitmap_set(tree, start, length);
+	if (ret)
+		str_liberror(ctx, ret, _("setting bad block bitmap"));
+}
+
+struct walk_ioerr {
+	struct scrub_ctx	*ctx;
+	struct disk		*disk;
+};
+
+static int
+walk_ioerr(
+	uint64_t		start,
+	uint64_t		length,
+	void			*arg)
+{
+	struct walk_ioerr	*wioerr = arg;
+	struct fsmap		keys[2];
+	char			descr[DESCR_BUFSZ];
+	dev_t			dev;
+
+	dev = xfs_disk_to_dev(wioerr->ctx, wioerr->disk);
 
-	snprintf(descr, DESCR_BUFSZ, _("dev %d:%d ioerr @ %"PRIu64":%"PRIu64" "),
+	snprintf(descr, DESCR_BUFSZ,
+_("dev %d:%d ioerr @ %"PRIu64":%"PRIu64" "),
 			major(dev), minor(dev), start, length);
 
 	/* Go figure out which blocks are bad from the fsmap. */
@@ -459,8 +467,60 @@ xfs_check_rmap_ioerr(
 	(keys + 1)->fmr_owner = ULLONG_MAX;
 	(keys + 1)->fmr_offset = ULLONG_MAX;
 	(keys + 1)->fmr_flags = UINT_MAX;
-	xfs_iterate_fsmap(ctx, descr, keys, xfs_check_rmap_error_report,
+	xfs_iterate_fsmap(wioerr->ctx, descr, keys, ioerr_fsmap_report,
 			&start);
+	return 0;
+}
+
+static int
+walk_ioerrs(
+	struct scrub_ctx		*ctx,
+	struct disk			*disk,
+	struct media_verify_state	*vs)
+{
+	struct walk_ioerr		wioerr = {
+		.ctx			= ctx,
+		.disk			= disk,
+	};
+	struct bitmap			*tree;
+
+	if (!disk)
+		return 0;
+	tree = bitmap_for_disk(ctx, disk, vs);
+	if (!tree)
+		return 0;
+	return bitmap_iterate(tree, walk_ioerr, &wioerr);
+}
+
+/* Given bad extent lists for the data & rtdev, find bad files. */
+static bool
+xfs_report_verify_errors(
+	struct scrub_ctx		*ctx,
+	struct media_verify_state	*vs)
+{
+	bool				moveon;
+	int				ret;
+
+	ret = walk_ioerrs(ctx, ctx->datadev, vs);
+	if (ret) {
+		str_liberror(ctx, ret, _("walking datadev io errors"));
+		return false;
+	}
+
+	ret = walk_ioerrs(ctx, ctx->rtdev, vs);
+	if (ret) {
+		str_liberror(ctx, ret, _("walking rtdev io errors"));
+		return false;
+	}
+
+	/* Scan the directory tree to get file paths. */
+	moveon = scan_fs_tree(ctx, xfs_report_verify_dir,
+			xfs_report_verify_dirent, vs);
+	if (!moveon)
+		return false;
+
+	/* Scan for unlinked files. */
+	return xfs_scan_all_inodes(ctx, xfs_report_verify_inode, vs);
 }
 
 /* Schedule a read-verify of a (data block) extent. */
@@ -571,7 +631,7 @@ xfs_scan_blocks(
 	}
 
 	ret = read_verify_pool_alloc(ctx, ctx->datadev,
-			ctx->mnt.fsgeom.blocksize, xfs_check_rmap_ioerr,
+			ctx->mnt.fsgeom.blocksize, remember_ioerr,
 			scrub_nproc(ctx), &vs.rvp_data);
 	if (ret) {
 		str_liberror(ctx, ret, _("creating datadev media verifier"));
@@ -579,7 +639,7 @@ xfs_scan_blocks(
 	}
 	if (ctx->logdev) {
 		ret = read_verify_pool_alloc(ctx, ctx->logdev,
-				ctx->mnt.fsgeom.blocksize, xfs_check_rmap_ioerr,
+				ctx->mnt.fsgeom.blocksize, remember_ioerr,
 				scrub_nproc(ctx), &vs.rvp_log);
 		if (ret) {
 			str_liberror(ctx, ret,
@@ -589,7 +649,7 @@ xfs_scan_blocks(
 	}
 	if (ctx->rtdev) {
 		ret = read_verify_pool_alloc(ctx, ctx->rtdev,
-				ctx->mnt.fsgeom.blocksize, xfs_check_rmap_ioerr,
+				ctx->mnt.fsgeom.blocksize, remember_ioerr,
 				scrub_nproc(ctx), &vs.rvp_realtime);
 		if (ret) {
 			str_liberror(ctx, ret,


  parent reply	other threads:[~2019-08-26 21:31 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-26 21:31 [PATCH 00/11] xfs_scrub: fix IO error reporting Darrick J. Wong
2019-08-26 21:31 ` [PATCH 01/11] xfs_scrub: separate media error reporting for attribute forks Darrick J. Wong
2019-08-26 21:31 ` [PATCH 02/11] xfs_scrub: improve reporting of file data media errors Darrick J. Wong
2019-08-26 21:31 ` [PATCH 03/11] xfs_scrub: better reporting of metadata " Darrick J. Wong
2019-08-26 21:31 ` [PATCH 04/11] xfs_scrub: improve reporting of file " Darrick J. Wong
2019-08-26 21:31 ` [PATCH 05/11] xfs_scrub: don't report media errors on unwritten extents Darrick J. Wong
2019-08-26 21:31 ` Darrick J. Wong [this message]
2019-08-26 21:31 ` [PATCH 07/11] xfs_scrub: request fewer bmaps when we can Darrick J. Wong
2019-08-26 21:31 ` [PATCH 08/11] xfs_scrub: fix media verification thread pool size calculations Darrick J. Wong
2019-08-26 21:32 ` [PATCH 09/11] libfrog: clean up platform_nproc Darrick J. Wong
2019-08-26 21:32 ` [PATCH 10/11] xfs_scrub: clean out the nproc global variable Darrick J. Wong
2019-08-26 21:32 ` [PATCH 11/11] xfs_scrub: create a new category for unfixable errors Darrick J. Wong
2019-09-06  3:38 [PATCH 00/11] xfs_scrub: fix IO error reporting Darrick J. Wong
2019-09-06  3:39 ` [PATCH 06/11] xfs_scrub: reduce fsmap activity for media errors Darrick J. Wong
2019-09-25 21:36 [PATCH 00/11] xfs_scrub: fix IO error reporting Darrick J. Wong
2019-09-25 21:36 ` [PATCH 06/11] xfs_scrub: reduce fsmap activity for media errors Darrick J. Wong
2019-10-21 17:17   ` Eric Sandeen
2019-10-21 18:14     ` Darrick J. Wong

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