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From: Dave Chinner <david@fromorbit.com>
To: linux-xfs@vger.kernel.org
Subject: [PATCH 07/27] xfsprogs: introduce liburcu support
Date: Thu, 15 Oct 2020 18:21:35 +1100
Message-ID: <20201015072155.1631135-8-david@fromorbit.com> (raw)
In-Reply-To: <20201015072155.1631135-1-david@fromorbit.com>

From: Dave Chinner <dchinner@redhat.com>

The upcoming buffer cache rework/kerenl sync-up requires atomic
variables. I could use C++11 atomics build into GCC, but they are a
pain to work with and shoe-horn into the kernel atomic variable API.

Much easier is to introduce a dependency on liburcu - the userspace
RCU library. This provides atomic variables that very closely match
the kernel atomic variable API, and it provides a very similar
memory model and memory barrier support to the kernel. And we get
RCU support that has an identical interface to the kernel and works
the same way.

Hence kernel code written with RCU algorithms and atomic variables
will just slot straight into the userspace xfsprogs code without us
having to think about whether the lockless algorithms will work in
userspace or not. This reduces glue and hoop jumping, and gets us
a step closer to having the entire userspace libxfs code MT safe.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
---
 configure.ac               |  3 +++
 copy/Makefile              |  3 ++-
 copy/xfs_copy.c            |  3 +++
 db/Makefile                |  3 ++-
 debian/control             |  2 +-
 growfs/Makefile            |  3 ++-
 include/builddefs.in       |  4 +++-
 include/platform_defs.h.in |  1 +
 libfrog/workqueue.c        |  3 +++
 libxfs/init.c              |  3 +++
 libxfs/libxfs_priv.h       |  3 +--
 logprint/Makefile          |  3 ++-
 m4/Makefile                |  1 +
 m4/package_urcu.m4         | 22 ++++++++++++++++++++++
 mdrestore/Makefile         |  3 ++-
 mkfs/Makefile              |  2 +-
 repair/Makefile            |  2 +-
 repair/prefetch.c          |  9 +++++++--
 repair/progress.c          |  4 +++-
 scrub/Makefile             |  3 ++-
 scrub/progress.c           |  2 ++
 21 files changed, 67 insertions(+), 15 deletions(-)
 create mode 100644 m4/package_urcu.m4

diff --git a/configure.ac b/configure.ac
index dc57bbd7cd8c..378622e89232 100644
--- a/configure.ac
+++ b/configure.ac
@@ -154,6 +154,9 @@ AC_PACKAGE_NEED_UUIDCOMPARE
 AC_PACKAGE_NEED_PTHREAD_H
 AC_PACKAGE_NEED_PTHREADMUTEXINIT
 
+AC_PACKAGE_NEED_URCU_H
+AC_PACKAGE_NEED_RCU_INIT
+
 AC_HAVE_FADVISE
 AC_HAVE_MADVISE
 AC_HAVE_MINCORE
diff --git a/copy/Makefile b/copy/Makefile
index 449b235fad40..1b00cd0d5743 100644
--- a/copy/Makefile
+++ b/copy/Makefile
@@ -9,7 +9,8 @@ LTCOMMAND = xfs_copy
 CFILES = xfs_copy.c
 HFILES = xfs_copy.h
 
-LLDLIBS = $(LIBXFS) $(LIBXLOG) $(LIBFROG) $(LIBUUID) $(LIBPTHREAD) $(LIBRT)
+LLDLIBS = $(LIBXFS) $(LIBXLOG) $(LIBFROG) $(LIBUUID) $(LIBPTHREAD) $(LIBRT) \
+	  $(LIBURCU)
 LTDEPENDENCIES = $(LIBXFS) $(LIBXLOG) $(LIBFROG)
 LLDFLAGS = -static-libtool-libs
 
diff --git a/copy/xfs_copy.c b/copy/xfs_copy.c
index fc7d225fe6a2..f5eff96976d7 100644
--- a/copy/xfs_copy.c
+++ b/copy/xfs_copy.c
@@ -110,6 +110,7 @@ do_message(int flags, int code, const char *fmt, ...)
 		fprintf(stderr,
 			_("Aborting XFS copy -- logfile error -- reason: %s\n"),
 			strerror(errno));
+		rcu_unregister_thread();
 		pthread_exit(NULL);
 	}
 }
@@ -224,6 +225,7 @@ begin_reader(void *arg)
 {
 	thread_args	*args = arg;
 
+	rcu_register_thread();
 	for (;;) {
 		pthread_mutex_lock(&args->wait);
 		if (do_write(args, NULL))
@@ -243,6 +245,7 @@ handle_error:
 	if (--glob_masks.num_working == 0)
 		pthread_mutex_unlock(&mainwait);
 	pthread_mutex_unlock(&glob_masks.mutex);
+	rcu_unregister_thread();
 	pthread_exit(NULL);
 	return NULL;
 }
diff --git a/db/Makefile b/db/Makefile
index 9bd9bf514f5d..4e44adc03577 100644
--- a/db/Makefile
+++ b/db/Makefile
@@ -17,7 +17,8 @@ HFILES = addr.h agf.h agfl.h agi.h attr.h attrshort.h bit.h block.h bmap.h \
 CFILES = $(HFILES:.h=.c) btdump.c btheight.c convert.c info.c
 LSRCFILES = xfs_admin.sh xfs_ncheck.sh xfs_metadump.sh
 
-LLDLIBS	= $(LIBXFS) $(LIBXLOG) $(LIBFROG) $(LIBUUID) $(LIBRT) $(LIBPTHREAD)
+LLDLIBS	= $(LIBXFS) $(LIBXLOG) $(LIBFROG) $(LIBUUID) $(LIBRT) $(LIBPTHREAD) \
+	  $(LIBURCU)
 LTDEPENDENCIES = $(LIBXFS) $(LIBXLOG) $(LIBFROG)
 LLDFLAGS += -static-libtool-libs
 
diff --git a/debian/control b/debian/control
index ddd17850e378..2a97fa633a1b 100644
--- a/debian/control
+++ b/debian/control
@@ -3,7 +3,7 @@ Section: admin
 Priority: optional
 Maintainer: XFS Development Team <linux-xfs@vger.kernel.org>
 Uploaders: Nathan Scott <nathans@debian.org>, Anibal Monsalve Salazar <anibal@debian.org>
-Build-Depends: uuid-dev, dh-autoreconf, debhelper (>= 5), gettext, libtool, libedit-dev, libblkid-dev (>= 2.17), linux-libc-dev, libdevmapper-dev, libattr1-dev, libicu-dev, dh-python, pkg-config
+Build-Depends: uuid-dev, dh-autoreconf, debhelper (>= 5), gettext, libtool, libedit-dev, libblkid-dev (>= 2.17), linux-libc-dev, libdevmapper-dev, libattr1-dev, libicu-dev, dh-python, pkg-config, liburcu-dev
 Standards-Version: 4.0.0
 Homepage: https://xfs.wiki.kernel.org/
 
diff --git a/growfs/Makefile b/growfs/Makefile
index a107d348ab6d..08601de77ab3 100644
--- a/growfs/Makefile
+++ b/growfs/Makefile
@@ -9,7 +9,8 @@ LTCOMMAND = xfs_growfs
 
 CFILES = xfs_growfs.c
 
-LLDLIBS = $(LIBXFS) $(LIBXCMD) $(LIBFROG) $(LIBUUID) $(LIBRT) $(LIBPTHREAD)
+LLDLIBS = $(LIBXFS) $(LIBXCMD) $(LIBFROG) $(LIBUUID) $(LIBRT) $(LIBPTHREAD) \
+	  $(LIBURCU)
 
 ifeq ($(ENABLE_EDITLINE),yes)
 LLDLIBS += $(LIBEDITLINE) $(LIBTERMCAP)
diff --git a/include/builddefs.in b/include/builddefs.in
index e8f447f92baf..78eddf4a9852 100644
--- a/include/builddefs.in
+++ b/include/builddefs.in
@@ -22,6 +22,7 @@ LDFLAGS =
 
 LIBRT = @librt@
 LIBUUID = @libuuid@
+LIBURCU = @liburcu@
 LIBPTHREAD = @libpthread@
 LIBTERMCAP = @libtermcap@
 LIBEDITLINE = @libeditline@
@@ -125,7 +126,8 @@ CROND_DIR = @crond_dir@
 GCCFLAGS = -funsigned-char -fno-strict-aliasing -Wall
 #	   -Wbitwise -Wno-transparent-union -Wno-old-initializer -Wno-decl
 
-PCFLAGS = -D_GNU_SOURCE $(GCCFLAGS)
+# _LGPL_SOURCE is for liburcu to work correctly with GPL/LGPL programs
+PCFLAGS = -D_LGPL_SOURCE -D_GNU_SOURCE $(GCCFLAGS)
 ifeq ($(HAVE_UMODE_T),yes)
 PCFLAGS += -DHAVE_UMODE_T
 endif
diff --git a/include/platform_defs.h.in b/include/platform_defs.h.in
index 1f7ceafb1fbc..8af43f3b8d8a 100644
--- a/include/platform_defs.h.in
+++ b/include/platform_defs.h.in
@@ -23,6 +23,7 @@
 #include <limits.h>
 #include <stdbool.h>
 #include <libgen.h>
+#include <urcu.h>
 
 typedef struct filldir		filldir_t;
 
diff --git a/libfrog/workqueue.c b/libfrog/workqueue.c
index fe3de4289379..cd232d9bddc0 100644
--- a/libfrog/workqueue.c
+++ b/libfrog/workqueue.c
@@ -11,6 +11,7 @@
 #include <stdbool.h>
 #include <errno.h>
 #include <assert.h>
+#include <urcu.h>
 #include "workqueue.h"
 
 /* Main processing thread */
@@ -24,6 +25,7 @@ workqueue_thread(void *arg)
 	 * Loop pulling work from the passed in work queue.
 	 * Check for notification to exit after every chunk of work.
 	 */
+	rcu_register_thread();
 	while (1) {
 		pthread_mutex_lock(&wq->lock);
 
@@ -52,6 +54,7 @@ workqueue_thread(void *arg)
 		(wi->function)(wi->queue, wi->index, wi->arg);
 		free(wi);
 	}
+	rcu_unregister_thread();
 
 	return NULL;
 }
diff --git a/libxfs/init.c b/libxfs/init.c
index 4dab7d25727e..477487e985c4 100644
--- a/libxfs/init.c
+++ b/libxfs/init.c
@@ -310,6 +310,8 @@ libxfs_init(libxfs_init_t *a)
 	fd = -1;
 	flags = (a->isreadonly | a->isdirect);
 
+	rcu_init();
+	rcu_register_thread();
 	radix_tree_init();
 
 	if (a->volname) {
@@ -957,6 +959,7 @@ libxfs_destroy(
 	libxfs_bcache_free();
 	cache_destroy(libxfs_bcache);
 	leaked = destroy_zones();
+	rcu_unregister_thread();
 	if (getenv("LIBXFS_LEAK_CHECK") && leaked)
 		exit(1);
 }
diff --git a/libxfs/libxfs_priv.h b/libxfs/libxfs_priv.h
index b88939c04adb..4cce1d680921 100644
--- a/libxfs/libxfs_priv.h
+++ b/libxfs/libxfs_priv.h
@@ -194,8 +194,7 @@ enum ce { CE_DEBUG, CE_CONT, CE_NOTE, CE_WARN, CE_ALERT, CE_PANIC };
 #define spin_unlock(a)		((void) 0)
 #define likely(x)		(x)
 #define unlikely(x)		(x)
-#define rcu_read_lock()		((void) 0)
-#define rcu_read_unlock()	((void) 0)
+
 /* Need to be able to handle this bare or in control flow */
 static inline bool WARN_ON(bool expr) {
 	return (expr);
diff --git a/logprint/Makefile b/logprint/Makefile
index 758504b39f0f..cdedbd0dbe82 100644
--- a/logprint/Makefile
+++ b/logprint/Makefile
@@ -12,7 +12,8 @@ CFILES = logprint.c \
 	 log_copy.c log_dump.c log_misc.c \
 	 log_print_all.c log_print_trans.c log_redo.c
 
-LLDLIBS	= $(LIBXFS) $(LIBXLOG) $(LIBFROG) $(LIBUUID) $(LIBRT) $(LIBPTHREAD)
+LLDLIBS	= $(LIBXFS) $(LIBXLOG) $(LIBFROG) $(LIBUUID) $(LIBRT) $(LIBPTHREAD) \
+	  $(LIBURCU)
 LTDEPENDENCIES = $(LIBXFS) $(LIBXLOG) $(LIBFROG)
 LLDFLAGS = -static-libtool-libs
 
diff --git a/m4/Makefile b/m4/Makefile
index c6c73dc9bbee..7312053039f4 100644
--- a/m4/Makefile
+++ b/m4/Makefile
@@ -24,6 +24,7 @@ LSRCFILES = \
 	package_services.m4 \
 	package_types.m4 \
 	package_icu.m4 \
+	package_urcu.m4 \
 	package_utilies.m4 \
 	package_uuiddev.m4 \
 	multilib.m4 \
diff --git a/m4/package_urcu.m4 b/m4/package_urcu.m4
new file mode 100644
index 000000000000..9b0dee35d9a1
--- /dev/null
+++ b/m4/package_urcu.m4
@@ -0,0 +1,22 @@
+AC_DEFUN([AC_PACKAGE_NEED_URCU_H],
+  [ AC_CHECK_HEADERS(urcu.h)
+    if test $ac_cv_header_urcu_h = no; then
+	AC_CHECK_HEADERS(urcu.h,, [
+	echo
+	echo 'FATAL ERROR: could not find a valid urcu header.'
+	exit 1])
+    fi
+  ])
+
+AC_DEFUN([AC_PACKAGE_NEED_RCU_INIT],
+  [ AC_MSG_CHECKING([for liburcu])
+    AC_TRY_COMPILE([
+#define _GNU_SOURCE
+#include <urcu.h>
+    ], [
+	rcu_init();
+    ],	liburcu=-lurcu
+	AC_MSG_RESULT(yes),
+	AC_MSG_RESULT(no))
+    AC_SUBST(liburcu)
+  ])
diff --git a/mdrestore/Makefile b/mdrestore/Makefile
index d946955b0517..8f28ddab326b 100644
--- a/mdrestore/Makefile
+++ b/mdrestore/Makefile
@@ -8,7 +8,8 @@ include $(TOPDIR)/include/builddefs
 LTCOMMAND = xfs_mdrestore
 CFILES = xfs_mdrestore.c
 
-LLDLIBS = $(LIBXFS) $(LIBFROG) $(LIBRT) $(LIBPTHREAD) $(LIBUUID)
+LLDLIBS = $(LIBXFS) $(LIBFROG) $(LIBRT) $(LIBPTHREAD) $(LIBUUID) \
+	  $(LIBURCU)
 LTDEPENDENCIES = $(LIBXFS) $(LIBFROG)
 LLDFLAGS = -static
 
diff --git a/mkfs/Makefile b/mkfs/Makefile
index b8805f7e1ea1..811ba9dbe29b 100644
--- a/mkfs/Makefile
+++ b/mkfs/Makefile
@@ -11,7 +11,7 @@ HFILES =
 CFILES = proto.c xfs_mkfs.c
 
 LLDLIBS += $(LIBXFS) $(LIBXCMD) $(LIBFROG) $(LIBRT) $(LIBPTHREAD) $(LIBBLKID) \
-	$(LIBUUID) $(LIBINIH)
+	$(LIBUUID) $(LIBINIH) $(LIBURCU)
 LTDEPENDENCIES += $(LIBXFS) $(LIBXCMD) $(LIBFROG)
 LLDFLAGS = -static-libtool-libs
 
diff --git a/repair/Makefile b/repair/Makefile
index 5f0764d1c3cd..47536ca1cc11 100644
--- a/repair/Makefile
+++ b/repair/Makefile
@@ -72,7 +72,7 @@ CFILES = \
 	xfs_repair.c
 
 LLDLIBS = $(LIBXFS) $(LIBXLOG) $(LIBXCMD) $(LIBFROG) $(LIBUUID) $(LIBRT) \
-	$(LIBPTHREAD) $(LIBBLKID)
+	$(LIBPTHREAD) $(LIBBLKID) $(LIBURCU)
 LTDEPENDENCIES = $(LIBXFS) $(LIBXLOG) $(LIBXCMD) $(LIBFROG)
 LLDFLAGS = -static-libtool-libs
 
diff --git a/repair/prefetch.c b/repair/prefetch.c
index 48affa1869f8..22a0c0c902d9 100644
--- a/repair/prefetch.c
+++ b/repair/prefetch.c
@@ -660,6 +660,7 @@ pf_io_worker(
 	if (buf == NULL)
 		return NULL;
 
+	rcu_register_thread();
 	pthread_mutex_lock(&args->lock);
 	while (!args->queuing_done || !btree_is_empty(args->io_queue)) {
 		pftrace("waiting to start prefetch I/O for AG %d", args->agno);
@@ -682,6 +683,7 @@ pf_io_worker(
 	free(buf);
 
 	pftrace("finished prefetch I/O for AG %d", args->agno);
+	rcu_unregister_thread();
 
 	return NULL;
 }
@@ -726,6 +728,8 @@ pf_queuing_worker(
 	struct xfs_ino_geometry	*igeo = M_IGEO(mp);
 	unsigned long long	cluster_mask;
 
+	rcu_register_thread();
+
 	cluster_mask = (1ULL << igeo->inodes_per_cluster) - 1;
 
 	for (i = 0; i < PF_THREAD_COUNT; i++) {
@@ -739,7 +743,7 @@ pf_queuing_worker(
 			args->io_threads[i] = 0;
 			if (i == 0) {
 				pf_skip_prefetch_thread(args);
-				return NULL;
+				goto out;
 			}
 			/*
 			 * since we have at least one I/O thread, use them for
@@ -779,7 +783,6 @@ pf_queuing_worker(
 			 * Start processing as well, in case everything so
 			 * far was already prefetched and the queue is empty.
 			 */
-			
 			pf_start_io_workers(args);
 			pf_start_processing(args);
 			sem_wait(&args->ra_count);
@@ -841,6 +844,8 @@ pf_queuing_worker(
 	if (next_args)
 		pf_create_prefetch_thread(next_args);
 
+out:
+	rcu_unregister_thread();
 	return NULL;
 }
 
diff --git a/repair/progress.c b/repair/progress.c
index e5a9c1efa822..f6c4d988444e 100644
--- a/repair/progress.c
+++ b/repair/progress.c
@@ -182,6 +182,7 @@ progress_rpt_thread (void *p)
 		do_error (_("progress_rpt: cannot malloc progress msg buffer\n"));
 
 	running = 1;
+	rcu_register_thread();
 
 	/*
 	 * Specify a repeating timer that fires each MSG_INTERVAL seconds.
@@ -286,7 +287,8 @@ progress_rpt_thread (void *p)
 		do_warn(_("cannot delete timer\n"));
 
 	free (msgbuf);
-	return (NULL);
+	rcu_unregister_thread();
+	return NULL;
 }
 
 int
diff --git a/scrub/Makefile b/scrub/Makefile
index 47c887eb79a1..849e3afd5af3 100644
--- a/scrub/Makefile
+++ b/scrub/Makefile
@@ -71,7 +71,8 @@ spacemap.c \
 vfs.c \
 xfs_scrub.c
 
-LLDLIBS += $(LIBHANDLE) $(LIBFROG) $(LIBPTHREAD) $(LIBICU_LIBS) $(LIBRT)
+LLDLIBS += $(LIBHANDLE) $(LIBFROG) $(LIBPTHREAD) $(LIBICU_LIBS) $(LIBRT) \
+	$(LIBURCU)
 LTDEPENDENCIES += $(LIBHANDLE) $(LIBFROG)
 LLDFLAGS = -static
 
diff --git a/scrub/progress.c b/scrub/progress.c
index d8130ca5f93c..4a66fb0d5cfb 100644
--- a/scrub/progress.c
+++ b/scrub/progress.c
@@ -117,6 +117,7 @@ progress_report_thread(void *arg)
 	struct timespec		abstime;
 	int			ret;
 
+	rcu_register_thread();
 	pthread_mutex_lock(&pt.lock);
 	while (1) {
 		uint64_t	progress_val;
@@ -140,6 +141,7 @@ progress_report_thread(void *arg)
 			progress_report(progress_val);
 	}
 	pthread_mutex_unlock(&pt.lock);
+	rcu_unregister_thread();
 	return NULL;
 }
 
-- 
2.28.0


  parent reply index

Thread overview: 49+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-15  7:21 [PATCH 00/27] [RFC, WIP] xfsprogs: xfs_buf unification and AIO Dave Chinner
2020-10-15  7:21 ` [PATCH 01/27] xfsprogs: remove unused buffer tracing code Dave Chinner
2020-10-15  7:21 ` [PATCH 02/27] xfsprogs: remove unused IO_DEBUG functionality Dave Chinner
2020-11-16  2:31   ` Eric Sandeen
2020-10-15  7:21 ` [PATCH 03/27] libxfs: get rid of b_bcount from xfs_buf Dave Chinner
2020-11-23 19:53   ` Eric Sandeen
2020-10-15  7:21 ` [PATCH 04/27] libxfs: rename buftarg->dev to btdev Dave Chinner
2020-11-16  2:33   ` Eric Sandeen
2020-10-15  7:21 ` [PATCH 05/27] xfsprogs: get rid of ancient btree tracing fragments Dave Chinner
2020-11-16  2:35   ` Eric Sandeen
2020-10-15  7:21 ` [PATCH 06/27] xfsprogs: remove xfs_buf_t typedef Dave Chinner
2020-10-15 15:22   ` Darrick J. Wong
2020-10-15 20:54     ` Dave Chinner
2020-10-15  7:21 ` Dave Chinner [this message]
2020-10-15  7:21 ` [PATCH 08/27] libxfs: add spinlock_t wrapper Dave Chinner
2020-10-15  7:21 ` [PATCH 09/27] atomic: convert to uatomic Dave Chinner
2020-10-15  7:21 ` [PATCH 10/27] libxfs: add kernel-compatible completion API Dave Chinner
2020-10-15 17:09   ` Darrick J. Wong
2020-10-19 22:21     ` Dave Chinner
2020-10-15  7:21 ` [PATCH 11/27] libxfs: add wrappers for kernel semaphores Dave Chinner
2020-10-15  7:21 ` [PATCH 12/27] xfsprogs: convert use-once buffer reads to uncached IO Dave Chinner
2020-10-15 17:12   ` Darrick J. Wong
2020-10-19 22:36     ` Dave Chinner
2020-10-15  7:21 ` [PATCH 13/27] libxfs: introduce userspace buftarg infrastructure Dave Chinner
2020-10-15  7:21 ` [PATCH 14/27] xfs: rename libxfs_buftarg_init to libxfs_open_devices() Dave Chinner
2020-10-15  7:21 ` [PATCH 15/27] libxfs: introduce userspace buftarg infrastructure Dave Chinner
2020-10-15 17:16   ` Darrick J. Wong
2020-10-15  7:21 ` [PATCH 16/27] libxfs: add a synchronous IO engine to the buftarg Dave Chinner
2020-10-15  7:21 ` [PATCH 17/27] xfsprogs: convert libxfs_readbufr to libxfs_buf_read_uncached Dave Chinner
2020-10-15  7:21 ` [PATCH 18/27] libxfs: convert libxfs_bwrite to buftarg IO Dave Chinner
2020-10-15  7:21 ` [PATCH 19/27] libxfs: add cache infrastructure to buftarg Dave Chinner
2020-10-15  7:21 ` [PATCH 20/27] libxfs: add internal lru to btcache Dave Chinner
2020-10-15  7:21 ` [PATCH 21/27] libxfs: Add kernel list_lru wrapper Dave Chinner
2020-10-15  7:21 ` [PATCH 22/27] libxfs: introduce new buffer cache infrastructure Dave Chinner
2020-10-15 17:46   ` Darrick J. Wong
2020-10-15  7:21 ` [PATCH 23/27] libxfs: use PSI information to detect memory pressure Dave Chinner
2020-10-15 17:56   ` Darrick J. Wong
2020-10-15 21:20     ` Dave Chinner
2020-10-15  7:21 ` [PATCH 24/27] libxfs: add a buftarg cache shrinker implementation Dave Chinner
2020-10-15 18:01   ` Darrick J. Wong
2020-10-15 21:33     ` Dave Chinner
2020-10-15  7:21 ` [PATCH 25/27] libxfs: switch buffer cache implementations Dave Chinner
2020-10-15  7:21 ` [PATCH 26/27] build: set platform_defs.h.in dependency correctly Dave Chinner
2020-10-15  7:21 ` [PATCH 27/27] libxfs: convert sync IO buftarg engine to AIO Dave Chinner
2020-10-15 18:26   ` Darrick J. Wong
2020-10-15 21:42     ` Dave Chinner
2020-10-15  7:29 ` [PATCH 00/27] [RFC, WIP] xfsprogs: xfs_buf unification and AIO Dave Chinner
2020-10-15 18:37 ` Darrick J. Wong
2020-10-15 22:35   ` Dave Chinner

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