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/linux-6.15/lib/tests/
H A Dusercopy_kunit.c35 char *kmem; member
51 char *kmem = priv->kmem; in usercopy_test_check_nonzero_user() local
65 kmem += start; in usercopy_test_check_nonzero_user()
82 memset(kmem, 0x0, size); in usercopy_test_check_nonzero_user()
84 kmem[i] = 0xff; in usercopy_test_check_nonzero_user()
86 kmem[i] = 0xff; in usercopy_test_check_nonzero_user()
110 char *kmem = priv->kmem; in usercopy_test_copy_struct_from_user() local
180 char *kmem = priv->kmem; in usercopy_test_valid() local
188 KUNIT_EXPECT_MEMEQ_MSG(test, kmem, kmem + PAGE_SIZE, PAGE_SIZE, in usercopy_test_valid()
222 char *kmem = priv->kmem; in usercopy_test_invalid() local
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/linux-6.15/tools/perf/Documentation/
H A Dexamples.txt31 titan:~> perf stat -e kmem:mm_page_pcpu_drain -e kmem:mm_page_alloc
32 -e kmem:mm_page_free_batched -e kmem:mm_page_free ./hackbench 10
38 27576 kmem:mm_page_alloc
40 20934 kmem:mm_page_free
48 kmem:mm_page_alloc -e kmem:mm_page_free_batched -e
49 kmem:mm_page_free ./hackbench 10
161 kmem:mm_page_alloc -e kmem:mm_page_free_batched -e
162 kmem:mm_page_free sleep 10
177 kmem:mm_page_alloc -e kmem:mm_page_free_batched -e
178 kmem:mm_page_free sleep 1
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H A Dperf-kmem.txt1 perf-kmem(1)
6 perf-kmem - Tool to trace/measure kernel memory properties
11 'perf kmem' [<options>] {record|stat}
15 There are two variants of perf kmem:
17 'perf kmem [<options>] record [<perf-record-options>] <command>' to
18 record the kmem events of an arbitrary workload. Additional 'perf
22 'perf kmem [<options>] stat' to report kernel memory statistics.
67 Show live page stat. The perf kmem shows total allocation stat by
/linux-6.15/Documentation/trace/
H A Dtracepoint-analysis.rst98 -e kmem:mm_page_alloc -e kmem:mm_page_free \
99 -e kmem:mm_page_free_batched \
104 2143 kmem:mm_page_free
125 $ perf stat -e kmem:mm_page_alloc -e kmem:mm_page_free \
153 $ perf stat --repeat 5 -e kmem:mm_page_alloc -e kmem:mm_page_free
176 $ perf stat -e kmem:mm_page_alloc -e kmem:mm_page_free \
177 -e kmem:mm_page_free_batched \
229 -e kmem:mm_page_alloc -e kmem:mm_page_free \
230 -e kmem:mm_page_free_batched \
271 -e kmem:mm_page_alloc -e kmem:mm_page_free \
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H A Dindex.rst19 events-kmem
H A Devents.rst461 # echo 'enable_event:kmem:kmalloc:1' > \
468 # echo 'disable_event:kmem:kmalloc' > \
478 # echo '!enable_event:kmem:kmalloc:1' > \
481 # echo '!disable_event:kmem:kmalloc' > \
487 kmem:kmalloc and sched:sched_switch, but can't have two kmem:kmalloc
488 versions such as kmem:kmalloc and kmem:kmalloc:1 or 'kmem:kmalloc if
501 /sys/kernel/tracing/events/kmem/kmalloc/trigger
507 /sys/kernel/tracing/events/kmem/kmalloc/trigger
516 /sys/kernel/tracing/events/kmem/kmalloc/trigger
519 /sys/kernel/tracing/events/kmem/kmalloc/trigger
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H A Devents-kmem.rst2 Subsystem Trace Points: kmem
5 The kmem tracing system captures events related to object and page allocation
/linux-6.15/tools/testing/selftests/ftrace/test.d/trigger/
H A Dtrigger-hist.tc44 echo 'hist:keys=call_site.sym' > events/kmem/kmalloc/trigger
46 grep '{ call_site: \[[0-9a-f][0-9a-f]*\] [_a-zA-Z][_a-zA-Z]* *}' events/kmem/kmalloc/hist > /dev/nu…
53 echo 'hist:keys=call_site.sym-offset' > events/kmem/kmalloc/trigger
55 grep '{ call_site: \[[0-9a-f][0-9a-f]*\] [_a-zA-Z][_a-zA-Z]*+0x[0-9a-f][0-9a-f]*' events/kmem/kmall…
H A Dtrigger-hist-mod.tc45 echo 'hist:keys=bytes_req.log2' > events/kmem/kmalloc/trigger
47 grep 'bytes_req: ~ 2^[0-9]*' events/kmem/kmalloc/hist > /dev/null || \
/linux-6.15/tools/testing/selftests/ftrace/test.d/filter/
H A Devent-filter-function.tc13 echo 1 > events/kmem/kmem_cache_free/enable
17 echo 0 > events/kmem/kmem_cache_free/enable
34 echo "call_site.function == $target_func" > events/kmem/kmem_cache_free/filter
60 echo "call_site.function == 0x$address" > events/kmem/kmem_cache_free/filter
/linux-6.15/tools/perf/scripts/perl/bin/
H A Dcheck-perf-trace-record2 perf record -a -e kmem:kmalloc -e irq:softirq_entry -e kmem:kfree
/linux-6.15/drivers/infiniband/hw/mana/
H A Dcq.c147 if (cq->queue.kmem) in mana_ib_install_cq_cb()
148 gdma_cq = cq->queue.kmem; in mana_ib_install_cq_cb()
169 if (cq->queue.kmem) in mana_ib_remove_cq_cb()
180 struct gdma_queue *gdma_cq = cq->queue.kmem; in mana_ib_arm_cq()
192 struct gdma_queue *wq = qp->ud_qp.queues[MANA_UD_SEND_QUEUE].kmem; in handle_ud_sq_cqe()
208 struct gdma_queue *wq = qp->ud_qp.queues[MANA_UD_RECV_QUEUE].kmem; in handle_ud_rq_cqe()
300 struct gdma_queue *queue = cq->queue.kmem; in mana_ib_poll_cq()
H A Dwr.c13 struct gdma_queue *queue = qp->ud_qp.queues[MANA_UD_RECV_QUEUE].kmem; in mana_ib_post_recv_ud()
80 struct gdma_queue *queue = qp->ud_qp.queues[MANA_UD_SEND_QUEUE].kmem; in mana_ib_post_send_ud()
H A Dmain.c255 err = mana_gd_create_mana_wq_cq(&gc->mana_ib, &spec, &queue->kmem); in mana_ib_create_kernel_queue()
259 queue->gdma_region = queue->kmem->mem_info.dma_region_handle; in mana_ib_create_kernel_queue()
260 queue->kmem->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; in mana_ib_create_kernel_queue()
303 if (queue->kmem) in mana_ib_destroy_queue()
304 mana_gd_destroy_queue(mdev_to_gc(mdev), queue->kmem); in mana_ib_destroy_queue()
/linux-6.15/arch/x86/kernel/cpu/resctrl/
H A Dpseudo_lock.c270 kfree(plr->kmem); in pseudo_lock_region_clear()
271 plr->kmem = NULL; in pseudo_lock_region_clear()
384 plr->kmem = kzalloc(plr->size, GFP_KERNEL); in pseudo_lock_region_alloc()
385 if (!plr->kmem) { in pseudo_lock_region_alloc()
488 mem_r = plr->kmem; in resctrl_arch_pseudo_lock_fn()
908 mem_r = READ_ONCE(plr->kmem); in resctrl_arch_measure_cycles_lat_fn()
1013 mem_r = READ_ONCE(plr->kmem); in measure_residency_fn()
1533 physical = __pa(plr->kmem) >> PAGE_SHIFT; in pseudo_lock_dev_mmap()
1555 memset(plr->kmem + off, 0, vsize); in pseudo_lock_dev_mmap()
/linux-6.15/drivers/infiniband/hw/hns/
H A Dhns_roce_mr.c683 if (mtr->kmem) { in mtr_free_bufs()
684 hns_roce_buf_free(hr_dev, mtr->kmem); in mtr_free_bufs()
685 mtr->kmem = NULL; in mtr_free_bufs()
699 mtr->kmem = NULL; in mtr_alloc_bufs()
709 mtr->kmem = hns_roce_buf_alloc(hr_dev, total_size, in mtr_alloc_bufs()
713 if (IS_ERR(mtr->kmem)) { in mtr_alloc_bufs()
715 PTR_ERR(mtr->kmem)); in mtr_alloc_bufs()
716 return PTR_ERR(mtr->kmem); in mtr_alloc_bufs()
768 mtr->kmem, page_shift); in mtr_map_bufs()
1154 mtr->kmem = NULL; in hns_roce_mtr_create()
/linux-6.15/drivers/crypto/nx/
H A Dnx.c287 memset(nx_ctx->kmem, 0, nx_ctx->kmem_len); in nx_ctx_init()
648 nx_ctx->kmem = kmalloc(nx_ctx->kmem_len, GFP_KERNEL); in nx_crypto_ctx_init()
649 if (!nx_ctx->kmem) in nx_crypto_ctx_init()
653 nx_ctx->csbcpb = (struct nx_csbcpb *)(round_up((u64)nx_ctx->kmem, in nx_crypto_ctx_init()
728 kfree_sensitive(nx_ctx->kmem); in nx_crypto_ctx_exit()
744 kfree_sensitive(nx_ctx->kmem); in nx_crypto_ctx_aead_exit()
H A Dnx.h119 void *kmem; /* unaligned, kmalloc'd buffer */ member
/linux-6.15/drivers/dax/
H A DMakefile4 obj-$(CONFIG_DEV_DAX_KMEM) += kmem.o
/linux-6.15/mm/kasan/
H A Dkasan_test_c.c2017 char *kmem; in copy_user_test_oob() local
2023 kmem = kunit_kmalloc(test, size, GFP_KERNEL); in copy_user_test_oob()
2024 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, kmem); in copy_user_test_oob()
2038 unused = copy_from_user(kmem, usermem, size + 1)); in copy_user_test_oob()
2040 unused = copy_to_user(usermem, kmem, size + 1)); in copy_user_test_oob()
2042 unused = __copy_from_user(kmem, usermem, size + 1)); in copy_user_test_oob()
2044 unused = __copy_to_user(usermem, kmem, size + 1)); in copy_user_test_oob()
2048 unused = __copy_to_user_inatomic(usermem, kmem, size + 1)); in copy_user_test_oob()
2054 memset(kmem, 'a', size); in copy_user_test_oob()
2055 KUNIT_EXPECT_EQ(test, copy_to_user(usermem, kmem, size), 0); in copy_user_test_oob()
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/linux-6.15/tools/testing/selftests/ftrace/test.d/dynevent/
H A Dadd_remove_tprobe.tc9 SUBSYSTEM=kmem
/linux-6.15/tools/perf/scripts/perl/
H A Dcheck-perf-trace.pl43 sub kmem::kmalloc subroutine
/linux-6.15/Documentation/admin-guide/cgroup-v1/
H A Dmemory.rst100 memory.kmem.limit_in_bytes Deprecated knob to set and read the kernel
106 by memory.kmem.usage_in_bytes.
107 memory.kmem.usage_in_bytes show current kernel memory allocation
108 memory.kmem.failcnt show the number of kernel memory usage
110 memory.kmem.max_usage_in_bytes show max kernel memory usage recorded
112 memory.kmem.tcp.limit_in_bytes set/show hard limit for tcp buf memory
115 memory.kmem.tcp.usage_in_bytes show current tcp buf memory allocation
118 memory.kmem.tcp.failcnt show the number of tcp buf memory usage
122 memory.kmem.tcp.max_usage_in_bytes show max tcp buf memory usage recorded
338 memory.kmem.usage_in_bytes, or in a separate counter when it makes sense.
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/linux-6.15/tools/perf/
H A Dcommand-list.txt19 perf-kmem mainporcelain traceevent
/linux-6.15/Documentation/translations/zh_CN/core-api/
H A Dmemory-allocation.rst53 * 从用户空间触发的不可信任的分配应该是kmem核算的对象，必须设置 ``__GFP_ACCOUNT`` 位。

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