The patch titled
Subject: tools/vm/page-types.c: make walk_file() aware of address range option
has been added to the -mm tree. Its filename is
tools-vm-page-typesc-make-walk_file-aware-of-address-range-option.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/tools-vm-page-typesc-make-walk_file-aware-of-address-range-option.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/tools-vm-page-typesc-make-walk_file-aware-of-address-range-option.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Subject: tools/vm/page-types.c: make walk_file() aware of address range option
Patch series "tools/vm/page-types.c: a few improvements".
This patchset adds some improvements on tools/vm/page-types.c. Patch 1/3
makes -a option (specify address range) work with -f (file cache mode).
Patch 2/3 and 3/3 are to fix minor formatting issues of this tool. These
would make life a little easier for the users of this tool.
Please see individual patches for more details about specific issues.
This patch (of 3):
-a|--addr option is used to limit the range of address to be scanned for
page status. It works now for physical address space (dafult mode) or for
virtual address space (with -p option), but not for file address space
(with -f option). So make walk_file() aware of -a option.
Link: https://lkml.kernel.org/r/20211004061325.1525902-1-naoya.horiguchi@xxxxxxxxx
Link: https://lkml.kernel.org/r/20211004061325.1525902-2-naoya.horiguchi@xxxxxxxxx
Signed-off-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Cc: Konstantin Khlebnikov <koct9i@xxxxxxxxx>
Cc: Christian Hansen <chansen3@xxxxxxxxx>
Cc: Changbin Du <changbin.du@xxxxxxxxx>
Cc: Bin Wang <wangbin224@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/vm/page-types.c | 24 ++++++++++++++++++------
1 file changed, 18 insertions(+), 6 deletions(-)
--- a/tools/vm/page-types.c~tools-vm-page-typesc-make-walk_file-aware-of-address-range-option
+++ a/tools/vm/page-types.c
@@ -967,22 +967,19 @@ static struct sigaction sigbus_action =
.sa_flags = SA_SIGINFO,
};
-static void walk_file(const char *name, const struct stat *st)
+static void walk_file_range(const char *name, int fd,
+ unsigned long off, unsigned long end)
{
uint8_t vec[PAGEMAP_BATCH];
uint64_t buf[PAGEMAP_BATCH], flags;
uint64_t cgroup = 0;
uint64_t mapcnt = 0;
unsigned long nr_pages, pfn, i;
- off_t off, end = st->st_size;
- int fd;
ssize_t len;
void *ptr;
int first = 1;
- fd = checked_open(name, O_RDONLY|O_NOATIME|O_NOFOLLOW);
-
- for (off = 0; off < end; off += len) {
+ for (; off < end; off += len) {
nr_pages = (end - off + page_size - 1) / page_size;
if (nr_pages > PAGEMAP_BATCH)
nr_pages = PAGEMAP_BATCH;
@@ -1043,6 +1040,21 @@ got_sigbus:
flags, cgroup, mapcnt, buf[i]);
}
}
+}
+
+static void walk_file(const char *name, const struct stat *st)
+{
+ int i;
+ int fd;
+
+ fd = checked_open(name, O_RDONLY|O_NOATIME|O_NOFOLLOW);
+
+ if (!nr_addr_ranges)
+ add_addr_range(0, st->st_size / page_size);
+
+ for (i = 0; i < nr_addr_ranges; i++)
+ walk_file_range(name, fd, opt_offset[i] * page_size,
+ (opt_offset[i] + opt_size[i]) * page_size);
close(fd);
}
_
Patches currently in -mm which might be from naoya.horiguchi@xxxxxxx are
tools-vm-page-typesc-make-walk_file-aware-of-address-range-option.patch
tools-vm-page-typesc-move-show_file-to-summary-output.patch
tools-vm-page-typesc-print-file-offset-in-hexadecimal.patch
