[PATCH v6] DAX: enable iostat for read/write
by Toshi Kani
DAX IO path does not support iostat, but its metadata IO path does.
Therefore, iostat shows metadata IO statistics only, which has been
confusing to users.
Add iostat support to the DAX read/write path.
Note, iostat still does not support the DAX mmap path as it allows
user applications to access directly.
Signed-off-by: Toshi Kani <toshi.kani(a)hpe.com>
Cc: Andrew Morton <akpm(a)linux-foundation.org>
Cc: Dan Williams <dan.j.williams(a)intel.com>
Cc: Alexander Viro <viro(a)zeniv.linux.org.uk>
Cc: Dave Chinner <david(a)fromorbit.com>
Cc: Ross Zwisler <ross.zwisler(a)linux.intel.com>
Cc: Joe Perches <joe(a)perches.com>
---
v6:
- Change min_t() to max_t(), and sector_t to size_t. (Joe Perches)
---
fs/dax.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/fs/dax.c b/fs/dax.c
index 5c74f60..ac04f21 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1058,12 +1058,24 @@ dax_iomap_rw(struct kiocb *iocb, struct iov_iter *iter,
{
struct address_space *mapping = iocb->ki_filp->f_mapping;
struct inode *inode = mapping->host;
+ struct gendisk *disk = inode->i_sb->s_bdev->bd_disk;
loff_t pos = iocb->ki_pos, ret = 0, done = 0;
unsigned flags = 0;
+ unsigned long start = 0;
+ int do_acct = blk_queue_io_stat(disk->queue);
if (iov_iter_rw(iter) == WRITE)
flags |= IOMAP_WRITE;
+ if (do_acct) {
+ size_t sec = iov_iter_count(iter) >> 9;
+
+ start = jiffies;
+ generic_start_io_acct(iov_iter_rw(iter),
+ max_t(unsigned long, 1, sec),
+ &disk->part0);
+ }
+
while (iov_iter_count(iter)) {
ret = iomap_apply(inode, pos, iov_iter_count(iter), flags, ops,
iter, dax_iomap_actor);
@@ -1073,6 +1085,9 @@ dax_iomap_rw(struct kiocb *iocb, struct iov_iter *iter,
done += ret;
}
+ if (do_acct)
+ generic_end_io_acct(iov_iter_rw(iter), &disk->part0, start);
+
iocb->ki_pos += done;
return done ? done : ret;
}
4 years
[LSF/MM TOPIC] Badblocks checking/representation in filesystems
by Verma, Vishal L
The current implementation of badblocks, where we consult the badblocks
list for every IO in the block driver works, and is a last option
failsafe, but from a user perspective, it isn't the easiest interface to
work with.
A while back, Dave Chinner had suggested a move towards smarter
handling, and I posted initial RFC patches [1], but since then the topic
hasn't really moved forward.
I'd like to propose and have a discussion about the following new
functionality:
1. Filesystems develop a native representation of badblocks. For
example, in xfs, this would (presumably) be linked to the reverse
mapping btree. The filesystem representation has the potential to be
more efficient than the block driver doing the check, as the fs can
check the IO happening on a file against just that file's range. In
contrast, today, the block driver checks against the whole block device
range for every IO. On encountering badblocks, the filesystem can
generate a better notification/error message that points the user to
(file, offset) as opposed to the block driver, which can only provide
(block-device, sector).
2. The block layer adds a notifier to badblock addition/removal
operations, which the filesystem subscribes to, and uses to maintain its
badblocks accounting. (This part is implemented as a proof of concept in
the RFC mentioned above [1]).
3. The filesystem has a way of telling the block driver (a flag? a
different/new interface?) that it is responsible for badblock checking
so that the driver doesn't have to do its check. The driver checking
will have to remain in place as a catch-all for filesystems/interfaces
that don't or aren't capable of doing the checks at a higher layer.
Additionally, I saw some discussion about logical depop on the lists
again, and I was involved with discussions last year about expanding the
the badblocks infrastructure for this use. If that is a topic again this
year, I'd like to be involved in it too.
I'm also interested in participating in any other pmem/NVDIMM related
discussions.
Thank you,
-Vishal
[1]: http://www.linux.sgi.com/archives/xfs/2016-06/msg00299.html
4 years
[ndctl PATCH] test, multi-pmem: check namespace deletion
by Dan Williams
The initial implementation of multi-pmem support neglected to enable
deletion of pmem namespaces. Add a test to check for this condition.
Signed-off-by: Dan Williams <dan.j.williams(a)intel.com>
---
test/multi-pmem.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/test/multi-pmem.c b/test/multi-pmem.c
index 8f76e02d2fd1..dd1269ced667 100644
--- a/test/multi-pmem.c
+++ b/test/multi-pmem.c
@@ -54,6 +54,28 @@ static void destroy_namespace(struct ndctl_namespace *ndns)
cmd_destroy_namespace(argc, argv, ctx);
}
+/* Check that the namespace device is gone (if it wasn't the seed) */
+static int check_deleted(struct ndctl_region *region, const char *devname,
+ struct ndctl_test *test)
+{
+ struct ndctl_namespace *ndns;
+
+ if (!ndctl_test_attempt(test, KERNEL_VERSION(4, 10, 0)))
+ return 0;
+
+ ndctl_namespace_foreach(region, ndns) {
+ if (strcmp(devname, ndctl_namespace_get_devname(ndns)))
+ continue;
+ if (ndns == ndctl_region_get_namespace_seed(region))
+ continue;
+ fprintf(stderr, "mult-pmem: expected %s to be deleted\n",
+ devname);
+ return -ENXIO;
+ }
+
+ return 0;
+}
+
static int do_multi_pmem(struct ndctl_ctx *ctx, struct ndctl_test *test)
{
int i;
@@ -190,6 +212,9 @@ static int do_multi_pmem(struct ndctl_ctx *ctx, struct ndctl_test *test)
devname, blk_avail, blk_avail_orig);
return -ENXIO;
}
+
+ if (check_deleted(target, devname, test) != 0)
+ return -ENXIO;
}
ndns = namespaces[NUM_NAMESPACES - 1];
@@ -204,6 +229,9 @@ static int do_multi_pmem(struct ndctl_ctx *ctx, struct ndctl_test *test)
return -ENXIO;
}
+ if (check_deleted(target, devname, test) != 0)
+ return -ENXIO;
+
ndctl_bus_foreach(ctx, bus) {
if (strncmp(ndctl_bus_get_provider(bus), "nfit_test", 9) != 0)
continue;
4 years
[PATCH] libnvdimm, namespace: fix pmem namespace leak, delete when size set to zero
by Dan Williams
Commit 98a29c39dc68 ("libnvdimm, namespace: allow creation of multiple
pmem-namespaces per region") added support for establishing additional
pmem namespace beyond the seed device, similar to blk namespaces.
However, it neglected to delete the namespace when the size is set to
zero.
Fixes: 98a29c39dc68 ("libnvdimm, namespace: allow creation of multiple pmem-namespaces per region")
Cc: <stable(a)vger.kernel.org>
Signed-off-by: Dan Williams <dan.j.williams(a)intel.com>
---
drivers/nvdimm/namespace_devs.c | 23 ++++++++++-------------
1 file changed, 10 insertions(+), 13 deletions(-)
diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index 6307088b375f..a518cb1b59d4 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -957,6 +957,7 @@ static ssize_t __size_store(struct device *dev, unsigned long long val)
{
resource_size_t allocated = 0, available = 0;
struct nd_region *nd_region = to_nd_region(dev->parent);
+ struct nd_namespace_common *ndns = to_ndns(dev);
struct nd_mapping *nd_mapping;
struct nvdimm_drvdata *ndd;
struct nd_label_id label_id;
@@ -964,7 +965,7 @@ static ssize_t __size_store(struct device *dev, unsigned long long val)
u8 *uuid = NULL;
int rc, i;
- if (dev->driver || to_ndns(dev)->claim)
+ if (dev->driver || ndns->claim)
return -EBUSY;
if (is_namespace_pmem(dev)) {
@@ -1034,20 +1035,16 @@ static ssize_t __size_store(struct device *dev, unsigned long long val)
nd_namespace_pmem_set_resource(nd_region, nspm,
val * nd_region->ndr_mappings);
- } else if (is_namespace_blk(dev)) {
- struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
-
- /*
- * Try to delete the namespace if we deleted all of its
- * allocation, this is not the seed device for the
- * region, and it is not actively claimed by a btt
- * instance.
- */
- if (val == 0 && nd_region->ns_seed != dev
- && !nsblk->common.claim)
- nd_device_unregister(dev, ND_ASYNC);
}
+ /*
+ * Try to delete the namespace if we deleted all of its
+ * allocation, this is not the seed device for the region, and
+ * it is not actively claimed by a btt instance.
+ */
+ if (val == 0 && nd_region->ns_seed != dev && !ndns->claim)
+ nd_device_unregister(dev, ND_ASYNC);
+
return rc;
}
4 years
USPS issue #7909403: unable to delivery parcel
by USPS Express Delivery
Dear Customer,
USPS courier was unable to contact you for your parcel delivery.
Please review delivery label in attachment!
Yours sincerely,
Harold Glass,
USPS Parcels Operation Agent.
4 years
[PATCH v6] x86: fix kaslr and memmap collision
by Dave Jiang
CONFIG_RANDOMIZE_BASE relocates the kernel to a random base address.
However it does not take into account the memmap= parameter passed in from
the kernel cmdline. This results in the kernel sometimes being put in
the middle of memmap. Teaching kaslr to not insert the kernel in
memmap defined regions. We will support up to 4 memmap regions. Any
additional regions will cause kaslr to disable. The mem_avoid set has
been augmented to add up to 4 unusable regions of memmaps provided by the
user to exclude those regions from the set of valid address range to insert
the uncompressed kernel image. The nn@ss ranges will be skipped by the
mem_avoid set since it indicates memory useable.
Signed-off-by: Dave Jiang <dave.jiang(a)intel.com>
---
arch/x86/boot/boot.h | 3 +
arch/x86/boot/compressed/kaslr.c | 132 ++++++++++++++++++++++++++++++++++++++
arch/x86/boot/string.c | 38 +++++++++++
3 files changed, 172 insertions(+), 1 deletion(-)
v2:
Addressing comments from Ingo.
- Handle entire list of memmaps
v3:
Fix 32bit build issue
v4:
Addressing comments from Baoquan
- Not exclude nn@ss ranges
v5:
Addressing additional comments from Baoquan
- Update commit header and various coding style changes
v6:
Address comments from Kees
- Only fail for physical address randomization
diff --git a/arch/x86/boot/boot.h b/arch/x86/boot/boot.h
index e5612f3..59c2075 100644
--- a/arch/x86/boot/boot.h
+++ b/arch/x86/boot/boot.h
@@ -332,7 +332,10 @@ int strncmp(const char *cs, const char *ct, size_t count);
size_t strnlen(const char *s, size_t maxlen);
unsigned int atou(const char *s);
unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base);
+unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base);
+long simple_strtol(const char *cp, char **endp, unsigned int base);
size_t strlen(const char *s);
+char *strchr(const char *s, int c);
/* tty.c */
void puts(const char *);
diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
index a66854d..e919b70 100644
--- a/arch/x86/boot/compressed/kaslr.c
+++ b/arch/x86/boot/compressed/kaslr.c
@@ -11,6 +11,7 @@
*/
#include "misc.h"
#include "error.h"
+#include "../boot.h"
#include <generated/compile.h>
#include <linux/module.h>
@@ -56,11 +57,18 @@ struct mem_vector {
unsigned long size;
};
+/* only supporting at most 4 unusable memmap regions with kaslr */
+#define MAX_MEMMAP_REGIONS 4
+
+static bool memmap_too_large;
+
enum mem_avoid_index {
MEM_AVOID_ZO_RANGE = 0,
MEM_AVOID_INITRD,
MEM_AVOID_CMDLINE,
MEM_AVOID_BOOTPARAMS,
+ MEM_AVOID_MEMMAP_BEGIN,
+ MEM_AVOID_MEMMAP_END = MEM_AVOID_MEMMAP_BEGIN + MAX_MEMMAP_REGIONS - 1,
MEM_AVOID_MAX,
};
@@ -77,6 +85,119 @@ static bool mem_overlaps(struct mem_vector *one, struct mem_vector *two)
return true;
}
+/**
+ * _memparse - parse a string with mem suffixes into a number
+ * @ptr: Where parse begins
+ * @retptr: (output) Optional pointer to next char after parse completes
+ *
+ * Parses a string into a number. The number stored at @ptr is
+ * potentially suffixed with K, M, G, T, P, E.
+ */
+static unsigned long long _memparse(const char *ptr, char **retptr)
+{
+ char *endptr; /* local pointer to end of parsed string */
+
+ unsigned long long ret = simple_strtoull(ptr, &endptr, 0);
+
+ switch (*endptr) {
+ case 'E':
+ case 'e':
+ ret <<= 10;
+ case 'P':
+ case 'p':
+ ret <<= 10;
+ case 'T':
+ case 't':
+ ret <<= 10;
+ case 'G':
+ case 'g':
+ ret <<= 10;
+ case 'M':
+ case 'm':
+ ret <<= 10;
+ case 'K':
+ case 'k':
+ ret <<= 10;
+ endptr++;
+ default:
+ break;
+ }
+
+ if (retptr)
+ *retptr = endptr;
+
+ return ret;
+}
+
+static int
+parse_memmap(char *p, unsigned long long *start, unsigned long long *size)
+{
+ char *oldp;
+
+ if (!p)
+ return -EINVAL;
+
+ /* we don't care about this option here */
+ if (!strncmp(p, "exactmap", 8))
+ return -EINVAL;
+
+ oldp = p;
+ *size = _memparse(p, &p);
+ if (p == oldp)
+ return -EINVAL;
+
+ switch (*p) {
+ case '@':
+ /* skip this region, usable */
+ *start = 0;
+ *size = 0;
+ return 0;
+ case '#':
+ case '$':
+ case '!':
+ *start = _memparse(p + 1, &p);
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static void mem_avoid_memmap(void)
+{
+ char arg[128];
+ int rc = 0;
+
+ /* see if we have any memmap areas */
+ if (cmdline_find_option("memmap", arg, sizeof(arg)) > 0) {
+ int i = 0;
+ char *str = arg;
+
+ while (str && (i < MAX_MEMMAP_REGIONS)) {
+ unsigned long long start, size;
+ char *k = strchr(str, ',');
+
+ if (k)
+ *k++ = 0;
+
+ rc = parse_memmap(str, &start, &size);
+ if (rc < 0)
+ break;
+ str = k;
+ /* a usable region that should not be skipped */
+ if (size == 0)
+ continue;
+
+ mem_avoid[MEM_AVOID_MEMMAP_BEGIN + i].start = start;
+ mem_avoid[MEM_AVOID_MEMMAP_BEGIN + i].size = size;
+ i++;
+ }
+
+ /* more than 4 memmaps, fail kaslr */
+ if ((i >= MAX_MEMMAP_REGIONS) && str)
+ memmap_too_large = true;
+ }
+}
+
/*
* In theory, KASLR can put the kernel anywhere in the range of [16M, 64T).
* The mem_avoid array is used to store the ranges that need to be avoided
@@ -197,6 +318,9 @@ static void mem_avoid_init(unsigned long input, unsigned long input_size,
/* We don't need to set a mapping for setup_data. */
+ /* Mark the memmap regions we need to avoid */
+ mem_avoid_memmap();
+
#ifdef CONFIG_X86_VERBOSE_BOOTUP
/* Make sure video RAM can be used. */
add_identity_map(0, PMD_SIZE);
@@ -379,6 +503,12 @@ static unsigned long find_random_phys_addr(unsigned long minimum,
int i;
unsigned long addr;
+ /* Check if we had too many memmaps. */
+ if (memmap_too_large) {
+ debug_putstr("Aborted e820 scan (more than 4 memmap= args)!\n");
+ return 0;
+ }
+
/* Make sure minimum is aligned. */
minimum = ALIGN(minimum, CONFIG_PHYSICAL_ALIGN);
@@ -456,7 +586,7 @@ void choose_random_location(unsigned long input,
/* Walk e820 and find a random address. */
random_addr = find_random_phys_addr(min_addr, output_size);
if (!random_addr) {
- warn("KASLR disabled: could not find suitable E820 region!");
+ warn("Physical KASLR disabled: no suitable memory region!");
} else {
/* Update the new physical address location. */
if (*output != random_addr) {
diff --git a/arch/x86/boot/string.c b/arch/x86/boot/string.c
index cc3bd58..0464aaa 100644
--- a/arch/x86/boot/string.c
+++ b/arch/x86/boot/string.c
@@ -122,6 +122,31 @@ unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int bas
}
/**
+ * simple_strtoul - convert a string to an unsigned long
+ * @cp: The start of the string
+ * @endp: A pointer to the end of the parsed string will be placed here
+ * @base: The number base to use
+ */
+unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base)
+{
+ return simple_strtoull(cp, endp, base);
+}
+
+/**
+ * simple_strtol - convert a string to a signed long
+ * @cp: The start of the string
+ * @endp: A pointer to the end of the parsed string will be placed here
+ * @base: The number base to use
+ */
+long simple_strtol(const char *cp, char **endp, unsigned int base)
+{
+ if (*cp == '-')
+ return -simple_strtoul(cp + 1, endp, base);
+
+ return simple_strtoul(cp, endp, base);
+}
+
+/**
* strlen - Find the length of a string
* @s: The string to be sized
*/
@@ -155,3 +180,16 @@ char *strstr(const char *s1, const char *s2)
}
return NULL;
}
+
+/**
+ * strchr - Find the first occurrence of the character c in the string s.
+ * @s: the string to be searched
+ * @c: the character to search for
+ */
+char *strchr(const char *s, int c)
+{
+ while (*s != (char)c)
+ if (*s++ == '\0')
+ return NULL;
+ return (char *)s;
+}
4 years
[PATCH v4] DAX: enable iostat for read/write
by Toshi Kani
DAX IO path does not support iostat, but its metadata IO path does.
Therefore, iostat shows metadata IO statistics only, which has been
confusing to users.
Add iostat support to the DAX read/write path.
Note, iostat still does not support the DAX mmap path as it allows
user applications to access directly.
Signed-off-by: Toshi Kani <toshi.kani(a)hpe.com>
Cc: Andrew Morton <akpm(a)linux-foundation.org>
Cc: Dan Williams <dan.j.williams(a)intel.com>
Cc: Alexander Viro <viro(a)zeniv.linux.org.uk>
Cc: Dave Chinner <david(a)fromorbit.com>
Cc: Ross Zwisler <ross.zwisler(a)linux.intel.com>
---
v4: Rebased to 4.10, applied the v3 change to new dax_iomap_rw().
---
fs/dax.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/fs/dax.c b/fs/dax.c
index 5c74f60..4d5f4c0 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1058,12 +1058,22 @@ dax_iomap_rw(struct kiocb *iocb, struct iov_iter *iter,
{
struct address_space *mapping = iocb->ki_filp->f_mapping;
struct inode *inode = mapping->host;
+ struct gendisk *disk = inode->i_sb->s_bdev->bd_disk;
loff_t pos = iocb->ki_pos, ret = 0, done = 0;
unsigned flags = 0;
+ unsigned long start = 0;
if (iov_iter_rw(iter) == WRITE)
flags |= IOMAP_WRITE;
+ if (blk_queue_io_stat(disk->queue)) {
+ int sec = iov_iter_count(iter) >> 9;
+
+ start = jiffies;
+ generic_start_io_acct(iov_iter_rw(iter),
+ (!sec) ? 1 : sec, &disk->part0);
+ }
+
while (iov_iter_count(iter)) {
ret = iomap_apply(inode, pos, iov_iter_count(iter), flags, ops,
iter, dax_iomap_actor);
@@ -1073,6 +1083,9 @@ dax_iomap_rw(struct kiocb *iocb, struct iov_iter *iter,
done += ret;
}
+ if (start)
+ generic_end_io_acct(iov_iter_rw(iter), &disk->part0, start);
+
iocb->ki_pos += done;
return done ? done : ret;
}
4 years
[PATCH] dax: fix build warnings with FS_DAX and !FS_IOMAP
by Ross Zwisler
As reported by Arnd:
https://lkml.org/lkml/2017/1/10/756
Compiling with the following configuration:
# CONFIG_EXT2_FS is not set
# CONFIG_EXT4_FS is not set
# CONFIG_XFS_FS is not set
# CONFIG_FS_IOMAP depends on the above filesystems, as is not set
CONFIG_FS_DAX=y
generates build warnings about unused functions in fs/dax.c:
fs/dax.c:878:12: warning: ‘dax_insert_mapping’ defined but not used [-Wunused-function]
static int dax_insert_mapping(struct address_space *mapping,
^~~~~~~~~~~~~~~~~~
fs/dax.c:572:12: warning: ‘copy_user_dax’ defined but not used [-Wunused-function]
static int copy_user_dax(struct block_device *bdev, sector_t sector, size_t size,
^~~~~~~~~~~~~
fs/dax.c:542:12: warning: ‘dax_load_hole’ defined but not used [-Wunused-function]
static int dax_load_hole(struct address_space *mapping, void **entry,
^~~~~~~~~~~~~
fs/dax.c:312:14: warning: ‘grab_mapping_entry’ defined but not used [-Wunused-function]
static void *grab_mapping_entry(struct address_space *mapping, pgoff_t index,
^~~~~~~~~~~~~~~~~~
Now that the struct buffer_head based DAX fault paths and I/O path have
been removed we really depend on iomap support being present for DAX. Make
this explicit by selecting FS_IOMAP if we compile in DAX support.
This allows us to remove conditional selections of FS_IOMAP when FS_DAX was
present for ext2 and ext4, and to remove an #ifdef in fs/dax.c.
Signed-off-by: Ross Zwisler <ross.zwisler(a)linux.intel.com>
Reported-by: Arnd Bergmann <arnd(a)arndb.de>
Cc: Jan Kara <jack(a)suse.cz>
Cc: Christoph Hellwig <hch(a)lst.de>
---
fs/Kconfig | 1 +
fs/dax.c | 2 --
fs/ext2/Kconfig | 1 -
fs/ext4/Kconfig | 1 -
4 files changed, 1 insertion(+), 4 deletions(-)
diff --git a/fs/Kconfig b/fs/Kconfig
index c2a377c..83eab52 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -38,6 +38,7 @@ config FS_DAX
bool "Direct Access (DAX) support"
depends on MMU
depends on !(ARM || MIPS || SPARC)
+ select FS_IOMAP
help
Direct Access (DAX) can be used on memory-backed block devices.
If the block device supports DAX and the filesystem supports DAX,
diff --git a/fs/dax.c b/fs/dax.c
index 5c74f60..083b950 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -969,7 +969,6 @@ int __dax_zero_page_range(struct block_device *bdev, sector_t sector,
}
EXPORT_SYMBOL_GPL(__dax_zero_page_range);
-#ifdef CONFIG_FS_IOMAP
static sector_t dax_iomap_sector(struct iomap *iomap, loff_t pos)
{
return iomap->blkno + (((pos & PAGE_MASK) - iomap->offset) >> 9);
@@ -1407,4 +1406,3 @@ int dax_iomap_pmd_fault(struct vm_area_struct *vma, unsigned long address,
}
EXPORT_SYMBOL_GPL(dax_iomap_pmd_fault);
#endif /* CONFIG_FS_DAX_PMD */
-#endif /* CONFIG_FS_IOMAP */
diff --git a/fs/ext2/Kconfig b/fs/ext2/Kconfig
index 36bea5a..c634874e 100644
--- a/fs/ext2/Kconfig
+++ b/fs/ext2/Kconfig
@@ -1,6 +1,5 @@
config EXT2_FS
tristate "Second extended fs support"
- select FS_IOMAP if FS_DAX
help
Ext2 is a standard Linux file system for hard disks.
diff --git a/fs/ext4/Kconfig b/fs/ext4/Kconfig
index 7b90691..e38039f 100644
--- a/fs/ext4/Kconfig
+++ b/fs/ext4/Kconfig
@@ -37,7 +37,6 @@ config EXT4_FS
select CRC16
select CRYPTO
select CRYPTO_CRC32C
- select FS_IOMAP if FS_DAX
help
This is the next generation of the ext3 filesystem.
--
2.7.4
4 years
[PATCH v4 0/7] DAX tracepoints, mm argument simplification
by Ross Zwisler
Andrew,
This contains both my DAX tracepoint code and Dave Jiang's MM argument
simplifications. Dave's code was written with my tracepoint code as a
baseline, so it seemed simplest to keep them together in a single series.
This series is based on the v4.10-rc3-mmots-2017-01-09-17-08 snapshot. A
working tree can be found here:
https://git.kernel.org/cgit/linux/kernel/git/zwisler/linux.git/log/?h=mmo...
Changes from the previous versions of these patches:
- Combined Dave's code and mine into a single series.
- Resolved some minor merge conflics in Dave's patches so they could be
applied to the latest mmots snapshot.
- Added Reviewed-by and Acked-by tags to patches as appropriate.
My goal for this series is to get it merged for v4.11.
Thanks,
- Ross
Dave Jiang (2):
mm, dax: make pmd_fault() and friends to be the same as fault()
mm, dax: move pmd_fault() to take only vmf parameter
Ross Zwisler (5):
tracing: add __print_flags_u64()
dax: add tracepoint infrastructure, PMD tracing
dax: update MAINTAINERS entries for FS DAX
dax: add tracepoints to dax_pmd_load_hole()
dax: add tracepoints to dax_pmd_insert_mapping()
MAINTAINERS | 5 +-
drivers/dax/dax.c | 26 ++++---
fs/dax.c | 114 ++++++++++++++++--------------
fs/ext4/file.c | 13 ++--
fs/xfs/xfs_file.c | 15 ++--
include/linux/dax.h | 6 +-
include/linux/mm.h | 28 +++++++-
include/linux/pfn_t.h | 6 ++
include/linux/trace_events.h | 4 ++
include/trace/events/fs_dax.h | 156 ++++++++++++++++++++++++++++++++++++++++++
include/trace/trace_events.h | 11 +++
kernel/trace/trace_output.c | 38 ++++++++++
mm/memory.c | 11 ++-
13 files changed, 338 insertions(+), 95 deletions(-)
create mode 100644 include/trace/events/fs_dax.h
--
2.7.4
4 years
