The patch titled
Subject: mm/hugetlb_cgroup: switch to the new cftypes
has been added to the -mm mm-unstable branch. Its filename is
mm-hugetlb_cgroup-switch-to-the-new-cftypes.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-hugetlb_cgroup-switch-to-the-new-cftypes.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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 via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Xiu Jianfeng <xiujianfeng@xxxxxxxxxx>
Subject: mm/hugetlb_cgroup: switch to the new cftypes
Date: Wed, 12 Jun 2024 09:24:09 +0000
The previous patch has already reconstructed the cftype attributes based
on the templates and saved them in dfl_cftypes and legacy_cftypes. then
remove the old procedure and switch to the new cftypes.
Link: https://lkml.kernel.org/r/20240612092409.2027592-4-xiujianfeng@xxxxxxxxxx
Signed-off-by: Xiu Jianfeng <xiujianfeng@xxxxxxxxxx>
Cc: Muchun Song <muchun.song@xxxxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/hugetlb.h | 5 -
mm/hugetlb_cgroup.c | 163 +++-----------------------------------
2 files changed, 17 insertions(+), 151 deletions(-)
--- a/include/linux/hugetlb.h~mm-hugetlb_cgroup-switch-to-the-new-cftypes
+++ a/include/linux/hugetlb.h
@@ -686,11 +686,6 @@ struct hstate {
unsigned int nr_huge_pages_node[MAX_NUMNODES];
unsigned int free_huge_pages_node[MAX_NUMNODES];
unsigned int surplus_huge_pages_node[MAX_NUMNODES];
-#ifdef CONFIG_CGROUP_HUGETLB
- /* cgroup control files */
- struct cftype cgroup_files_dfl[8];
- struct cftype cgroup_files_legacy[10];
-#endif
char name[HSTATE_NAME_LEN];
};
--- a/mm/hugetlb_cgroup.c~mm-hugetlb_cgroup-switch-to-the-new-cftypes
+++ a/mm/hugetlb_cgroup.c
@@ -839,164 +839,26 @@ hugetlb_cgroup_cfttypes_init(struct hsta
}
}
-static void __init __hugetlb_cgroup_file_dfl_init(int idx)
+static void __init __hugetlb_cgroup_file_dfl_init(struct hstate *h)
{
- char buf[32];
- struct cftype *cft;
- struct hstate *h = &hstates[idx];
+ int idx = hstate_index(h);
hugetlb_cgroup_cfttypes_init(h, dfl_files + idx * DFL_TMPL_SIZE,
hugetlb_dfl_tmpl, DFL_TMPL_SIZE);
-
- /* format the size */
- mem_fmt(buf, sizeof(buf), huge_page_size(h));
-
- /* Add the limit file */
- cft = &h->cgroup_files_dfl[0];
- snprintf(cft->name, MAX_CFTYPE_NAME, "%s.max", buf);
- cft->private = MEMFILE_PRIVATE(idx, RES_LIMIT);
- cft->seq_show = hugetlb_cgroup_read_u64_max;
- cft->write = hugetlb_cgroup_write_dfl;
- cft->flags = CFTYPE_NOT_ON_ROOT;
-
- /* Add the reservation limit file */
- cft = &h->cgroup_files_dfl[1];
- snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.max", buf);
- cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_LIMIT);
- cft->seq_show = hugetlb_cgroup_read_u64_max;
- cft->write = hugetlb_cgroup_write_dfl;
- cft->flags = CFTYPE_NOT_ON_ROOT;
-
- /* Add the current usage file */
- cft = &h->cgroup_files_dfl[2];
- snprintf(cft->name, MAX_CFTYPE_NAME, "%s.current", buf);
- cft->private = MEMFILE_PRIVATE(idx, RES_USAGE);
- cft->seq_show = hugetlb_cgroup_read_u64_max;
- cft->flags = CFTYPE_NOT_ON_ROOT;
-
- /* Add the current reservation usage file */
- cft = &h->cgroup_files_dfl[3];
- snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.current", buf);
- cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_USAGE);
- cft->seq_show = hugetlb_cgroup_read_u64_max;
- cft->flags = CFTYPE_NOT_ON_ROOT;
-
- /* Add the events file */
- cft = &h->cgroup_files_dfl[4];
- snprintf(cft->name, MAX_CFTYPE_NAME, "%s.events", buf);
- cft->private = MEMFILE_PRIVATE(idx, 0);
- cft->seq_show = hugetlb_events_show;
- cft->file_offset = offsetof(struct hugetlb_cgroup, events_file[idx]);
- cft->flags = CFTYPE_NOT_ON_ROOT;
-
- /* Add the events.local file */
- cft = &h->cgroup_files_dfl[5];
- snprintf(cft->name, MAX_CFTYPE_NAME, "%s.events.local", buf);
- cft->private = MEMFILE_PRIVATE(idx, 0);
- cft->seq_show = hugetlb_events_local_show;
- cft->file_offset = offsetof(struct hugetlb_cgroup,
- events_local_file[idx]);
- cft->flags = CFTYPE_NOT_ON_ROOT;
-
- /* Add the numa stat file */
- cft = &h->cgroup_files_dfl[6];
- snprintf(cft->name, MAX_CFTYPE_NAME, "%s.numa_stat", buf);
- cft->private = MEMFILE_PRIVATE(idx, 0);
- cft->seq_show = hugetlb_cgroup_read_numa_stat;
- cft->flags = CFTYPE_NOT_ON_ROOT;
-
- /* NULL terminate the last cft */
- cft = &h->cgroup_files_dfl[7];
- memset(cft, 0, sizeof(*cft));
-
- WARN_ON(cgroup_add_dfl_cftypes(&hugetlb_cgrp_subsys,
- h->cgroup_files_dfl));
}
-static void __init __hugetlb_cgroup_file_legacy_init(int idx)
+static void __init __hugetlb_cgroup_file_legacy_init(struct hstate *h)
{
- char buf[32];
- struct cftype *cft;
- struct hstate *h = &hstates[idx];
+ int idx = hstate_index(h);
hugetlb_cgroup_cfttypes_init(h, legacy_files + idx * LEGACY_TMPL_SIZE,
hugetlb_legacy_tmpl, LEGACY_TMPL_SIZE);
-
- /* format the size */
- mem_fmt(buf, sizeof(buf), huge_page_size(h));
-
- /* Add the limit file */
- cft = &h->cgroup_files_legacy[0];
- snprintf(cft->name, MAX_CFTYPE_NAME, "%s.limit_in_bytes", buf);
- cft->private = MEMFILE_PRIVATE(idx, RES_LIMIT);
- cft->read_u64 = hugetlb_cgroup_read_u64;
- cft->write = hugetlb_cgroup_write_legacy;
-
- /* Add the reservation limit file */
- cft = &h->cgroup_files_legacy[1];
- snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.limit_in_bytes", buf);
- cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_LIMIT);
- cft->read_u64 = hugetlb_cgroup_read_u64;
- cft->write = hugetlb_cgroup_write_legacy;
-
- /* Add the usage file */
- cft = &h->cgroup_files_legacy[2];
- snprintf(cft->name, MAX_CFTYPE_NAME, "%s.usage_in_bytes", buf);
- cft->private = MEMFILE_PRIVATE(idx, RES_USAGE);
- cft->read_u64 = hugetlb_cgroup_read_u64;
-
- /* Add the reservation usage file */
- cft = &h->cgroup_files_legacy[3];
- snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.usage_in_bytes", buf);
- cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_USAGE);
- cft->read_u64 = hugetlb_cgroup_read_u64;
-
- /* Add the MAX usage file */
- cft = &h->cgroup_files_legacy[4];
- snprintf(cft->name, MAX_CFTYPE_NAME, "%s.max_usage_in_bytes", buf);
- cft->private = MEMFILE_PRIVATE(idx, RES_MAX_USAGE);
- cft->write = hugetlb_cgroup_reset;
- cft->read_u64 = hugetlb_cgroup_read_u64;
-
- /* Add the MAX reservation usage file */
- cft = &h->cgroup_files_legacy[5];
- snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.max_usage_in_bytes", buf);
- cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_MAX_USAGE);
- cft->write = hugetlb_cgroup_reset;
- cft->read_u64 = hugetlb_cgroup_read_u64;
-
- /* Add the failcntfile */
- cft = &h->cgroup_files_legacy[6];
- snprintf(cft->name, MAX_CFTYPE_NAME, "%s.failcnt", buf);
- cft->private = MEMFILE_PRIVATE(idx, RES_FAILCNT);
- cft->write = hugetlb_cgroup_reset;
- cft->read_u64 = hugetlb_cgroup_read_u64;
-
- /* Add the reservation failcntfile */
- cft = &h->cgroup_files_legacy[7];
- snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.failcnt", buf);
- cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_FAILCNT);
- cft->write = hugetlb_cgroup_reset;
- cft->read_u64 = hugetlb_cgroup_read_u64;
-
- /* Add the numa stat file */
- cft = &h->cgroup_files_legacy[8];
- snprintf(cft->name, MAX_CFTYPE_NAME, "%s.numa_stat", buf);
- cft->private = MEMFILE_PRIVATE(idx, 0);
- cft->seq_show = hugetlb_cgroup_read_numa_stat;
-
- /* NULL terminate the last cft */
- cft = &h->cgroup_files_legacy[9];
- memset(cft, 0, sizeof(*cft));
-
- WARN_ON(cgroup_add_legacy_cftypes(&hugetlb_cgrp_subsys,
- h->cgroup_files_legacy));
}
-static void __init __hugetlb_cgroup_file_init(int idx)
+static void __init __hugetlb_cgroup_file_init(struct hstate *h)
{
- __hugetlb_cgroup_file_dfl_init(idx);
- __hugetlb_cgroup_file_legacy_init(idx);
+ __hugetlb_cgroup_file_dfl_init(h);
+ __hugetlb_cgroup_file_legacy_init(h);
}
static void __init __hugetlb_cgroup_file_pre_init(void)
@@ -1011,13 +873,22 @@ static void __init __hugetlb_cgroup_file
BUG_ON(!legacy_files);
}
+static void __init __hugetlb_cgroup_file_post_init(void)
+{
+ WARN_ON(cgroup_add_dfl_cftypes(&hugetlb_cgrp_subsys,
+ dfl_files));
+ WARN_ON(cgroup_add_legacy_cftypes(&hugetlb_cgrp_subsys,
+ legacy_files));
+}
+
void __init hugetlb_cgroup_file_init(void)
{
struct hstate *h;
__hugetlb_cgroup_file_pre_init();
for_each_hstate(h)
- __hugetlb_cgroup_file_init(hstate_index(h));
+ __hugetlb_cgroup_file_init(h);
+ __hugetlb_cgroup_file_post_init();
}
/*
_
Patches currently in -mm which might be from xiujianfeng@xxxxxxxxxx are
mm-hugetlb_cgroup-identify-the-legacy-using-cgroup_subsys_on_dfl.patch
mm-hugetlb_cgroup-prepare-cftypes-based-on-template.patch
mm-hugetlb_cgroup-switch-to-the-new-cftypes.patch
