diff --git a/arch/alpha/mm/fault.c b/arch/alpha/mm/fault.c
index c2303a8c2b9f7ca40cdb7d01e03fb0a7bde8a2a9..1983e43a5e2f45f91576abd7148c238f7c3f1a53 100644
--- a/arch/alpha/mm/fault.c
+++ b/arch/alpha/mm/fault.c
@@ -148,7 +148,7 @@ do_page_fault(unsigned long address, unsigned long mmcsr,
/* If for any reason at all we couldn't handle the fault,
make sure we exit gracefully rather than endlessly redo
the fault. */
- fault = handle_mm_fault(vma, address, flags);
+ fault = handle_mm_fault(vma, address, flags, NULL);
if (fault_signal_pending(fault, regs))
return;
diff --git a/arch/arc/mm/fault.c b/arch/arc/mm/fault.c
index 7287c793d1c9de1c9bd3f887923fe923474421ea..587dea524e6b7a3327f45d64a833b336e0676921 100644
--- a/arch/arc/mm/fault.c
+++ b/arch/arc/mm/fault.c
@@ -130,7 +130,7 @@ void do_page_fault(unsigned long address, struct pt_regs *regs)
goto bad_area;
}
- fault = handle_mm_fault(vma, address, flags);
+ fault = handle_mm_fault(vma, address, flags, NULL);
/* Quick path to respond to signals */
if (fault_signal_pending(fault, regs)) {
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index c6550eddfce190680b78a240ea8ad0cda5db3c0f..01a8e0f8fef7f9d6b268e2768243ad06f7abf4bd 100644
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@ -224,7 +224,7 @@ __do_page_fault(struct mm_struct *mm, unsigned long addr, unsigned int fsr,
goto out;
}
- return handle_mm_fault(vma, addr & PAGE_MASK, flags);
+ return handle_mm_fault(vma, addr & PAGE_MASK, flags, NULL);
check_stack:
/* Don't allow expansion below FIRST_USER_ADDRESS */
diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index 8afb238ff3358c0d785b58325f642973a4a77a24..be29f4076fe3c2b4c4622373361622a2977030f7 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -428,7 +428,7 @@ static vm_fault_t __do_page_fault(struct mm_struct *mm, unsigned long addr,
*/
if (!(vma->vm_flags & vm_flags))
return VM_FAULT_BADACCESS;
- return handle_mm_fault(vma, addr & PAGE_MASK, mm_flags);
+ return handle_mm_fault(vma, addr & PAGE_MASK, mm_flags, NULL);
}
static bool is_el0_instruction_abort(unsigned int esr)
diff --git a/arch/csky/mm/fault.c b/arch/csky/mm/fault.c
index b1dce9f2f04dd815fc713936701b9bcca0a7a66d..b252e6e4d32f4fef207af89b2c3ddc67ad1089fa 100644
--- a/arch/csky/mm/fault.c
+++ b/arch/csky/mm/fault.c
@@ -150,7 +150,8 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long write,
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- fault = handle_mm_fault(vma, address, write ? FAULT_FLAG_WRITE : 0);
+ fault = handle_mm_fault(vma, address, write ? FAULT_FLAG_WRITE : 0,
+ NULL);
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
diff --git a/arch/hexagon/mm/vm_fault.c b/arch/hexagon/mm/vm_fault.c
index cd3808f96b930b5523e788b38afa4c4e11007511..f12f330e7946b9852fdfc49bcfc97fee170c34b5 100644
--- a/arch/hexagon/mm/vm_fault.c
+++ b/arch/hexagon/mm/vm_fault.c
@@ -88,7 +88,7 @@ void do_page_fault(unsigned long address, long cause, struct pt_regs *regs)
break;
}
- fault = handle_mm_fault(vma, address, flags);
+ fault = handle_mm_fault(vma, address, flags, NULL);
if (fault_signal_pending(fault, regs))
return;
diff --git a/arch/ia64/mm/fault.c b/arch/ia64/mm/fault.c
index 3a4dec334cc58cb855ffc9558caa2d66a4d242a6..abf2808f9b4bafabf3eef9a398c2344d6c833a47 100644
--- a/arch/ia64/mm/fault.c
+++ b/arch/ia64/mm/fault.c
@@ -143,7 +143,7 @@ ia64_do_page_fault (unsigned long address, unsigned long isr, struct pt_regs *re
* sure we exit gracefully rather than endlessly redo the
* fault.
*/
- fault = handle_mm_fault(vma, address, flags);
+ fault = handle_mm_fault(vma, address, flags, NULL);
if (fault_signal_pending(fault, regs))
return;
diff --git a/arch/m68k/mm/fault.c b/arch/m68k/mm/fault.c
index 508abb63da6785ba2d3bc735938a0a9a09117b1b..08b35a318ebeb3c305c22290195fa79614c9ebfd 100644
--- a/arch/m68k/mm/fault.c
+++ b/arch/m68k/mm/fault.c
@@ -134,7 +134,7 @@ int do_page_fault(struct pt_regs *regs, unsigned long address,
* the fault.
*/
- fault = handle_mm_fault(vma, address, flags);
+ fault = handle_mm_fault(vma, address, flags, NULL);
pr_debug("handle_mm_fault returns %x\n", fault);
if (fault_signal_pending(fault, regs))
diff --git a/arch/microblaze/mm/fault.c b/arch/microblaze/mm/fault.c
index a2bfe587b49126f4fa44a035cf02e2e7463345f2..1a3d4c4ca28be0ebd93d337d7fbe9520ef6d2a09 100644
--- a/arch/microblaze/mm/fault.c
+++ b/arch/microblaze/mm/fault.c
@@ -214,7 +214,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- fault = handle_mm_fault(vma, address, flags);
+ fault = handle_mm_fault(vma, address, flags, NULL);
if (fault_signal_pending(fault, regs))
return;
diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c
index 01b168a90434aa564a20628a4586b5df9458864a..b1db39784db9dcfd3f8e5cd4d09b10aeaa7c7937 100644
--- a/arch/mips/mm/fault.c
+++ b/arch/mips/mm/fault.c
@@ -152,7 +152,7 @@ static void __kprobes __do_page_fault(struct pt_regs *regs, unsigned long write,
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- fault = handle_mm_fault(vma, address, flags);
+ fault = handle_mm_fault(vma, address, flags, NULL);
if (fault_signal_pending(fault, regs))
return;
diff --git a/arch/nds32/mm/fault.c b/arch/nds32/mm/fault.c
index 8fb73f6401a03e05c50e036a3cdcaf5a33cc4da0..d0ecc8fb5b237bf76dbaabf5a23e0a1b38460064 100644
--- a/arch/nds32/mm/fault.c
+++ b/arch/nds32/mm/fault.c
@@ -206,7 +206,7 @@ void do_page_fault(unsigned long entry, unsigned long addr,
* the fault.
*/
- fault = handle_mm_fault(vma, addr, flags);
+ fault = handle_mm_fault(vma, addr, flags, NULL);
/*
* If we need to retry but a fatal signal is pending, handle the
diff --git a/arch/nios2/mm/fault.c b/arch/nios2/mm/fault.c
index 4112ef0e247ee438308968f45daaf9bbfbb679e6..86beb9a2698eaa3bfe6add02d9b91485eb25790e 100644
--- a/arch/nios2/mm/fault.c
+++ b/arch/nios2/mm/fault.c
@@ -131,7 +131,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long cause,
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- fault = handle_mm_fault(vma, address, flags);
+ fault = handle_mm_fault(vma, address, flags, NULL);
if (fault_signal_pending(fault, regs))
return;
diff --git a/arch/openrisc/mm/fault.c b/arch/openrisc/mm/fault.c
index d2224ccca2941f4777c3f4aee06eb02db39f1e98..3daa491d1edbcc46b06c746474819a912319fd52 100644
--- a/arch/openrisc/mm/fault.c
+++ b/arch/openrisc/mm/fault.c
@@ -159,7 +159,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long address,
* the fault.
*/
- fault = handle_mm_fault(vma, address, flags);
+ fault = handle_mm_fault(vma, address, flags, NULL);
if (fault_signal_pending(fault, regs))
return;
diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c
index 66ac0719bd4927eb8dca1288728ddc2dd25d5f6a..e32d06928c24f335c570394fcc8af4578b59918e 100644
--- a/arch/parisc/mm/fault.c
+++ b/arch/parisc/mm/fault.c
@@ -302,7 +302,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long code,
* fault.
*/
- fault = handle_mm_fault(vma, address, flags);
+ fault = handle_mm_fault(vma, address, flags, NULL);
if (fault_signal_pending(fault, regs))
return;
diff --git a/arch/powerpc/mm/copro_fault.c b/arch/powerpc/mm/copro_fault.c
index b83abbead4a23237bab54f52f25520b16baf8e00..2d0276abe0a68a6077f167b558fc1d51dbec41db 100644
--- a/arch/powerpc/mm/copro_fault.c
+++ b/arch/powerpc/mm/copro_fault.c
@@ -64,7 +64,7 @@ int copro_handle_mm_fault(struct mm_struct *mm, unsigned long ea,
}
ret = 0;
- *flt = handle_mm_fault(vma, ea, is_write ? FAULT_FLAG_WRITE : 0);
+ *flt = handle_mm_fault(vma, ea, is_write ? FAULT_FLAG_WRITE : 0, NULL);
if (unlikely(*flt & VM_FAULT_ERROR)) {
if (*flt & VM_FAULT_OOM) {
ret = -ENOMEM;
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index 925a7231abb334d96232b0d7fa55846f539a5553..c6a5225a35214bfcef3bd8118328f758fdec8118 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -511,7 +511,7 @@ static int __do_page_fault(struct pt_regs *regs, unsigned long address,
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- fault = handle_mm_fault(vma, address, flags);
+ fault = handle_mm_fault(vma, address, flags, NULL);
major |= fault & VM_FAULT_MAJOR;
diff --git a/arch/riscv/mm/fault.c b/arch/riscv/mm/fault.c
index 5873835a3e6b715af02217d74549668fcac12b46..30c1124d0fb6ea8bffc979a227d93cacd8618e25 100644
--- a/arch/riscv/mm/fault.c
+++ b/arch/riscv/mm/fault.c
@@ -109,7 +109,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs)
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- fault = handle_mm_fault(vma, addr, flags);
+ fault = handle_mm_fault(vma, addr, flags, NULL);
/*
* If we need to retry but a fatal signal is pending, handle the
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index aebf9183bedd15a36fce4c315b0eca1169cfbb9d..ad783aaaf6492ac65767078821ce93a79e54950f 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -476,7 +476,7 @@ static inline vm_fault_t do_exception(struct pt_regs *regs, int access)
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- fault = handle_mm_fault(vma, address, flags);
+ fault = handle_mm_fault(vma, address, flags, NULL);
if (fault_signal_pending(fault, regs)) {
fault = VM_FAULT_SIGNAL;
if (flags & FAULT_FLAG_RETRY_NOWAIT)
diff --git a/arch/sh/mm/fault.c b/arch/sh/mm/fault.c
index fbe1f2fe9a8c8f558b75dd41f1bf028a83d9a623..3c0a11827f7ed180e5e52bece4f7be386df6eeb8 100644
--- a/arch/sh/mm/fault.c
+++ b/arch/sh/mm/fault.c
@@ -482,7 +482,7 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- fault = handle_mm_fault(vma, address, flags);
+ fault = handle_mm_fault(vma, address, flags, NULL);
if (unlikely(fault & (VM_FAULT_RETRY | VM_FAULT_ERROR)))
if (mm_fault_error(regs, error_code, address, fault))
diff --git a/arch/sparc/mm/fault_32.c b/arch/sparc/mm/fault_32.c
index cfef656eda0f948f814e943c313f4bf66c9b97be..06af03db4417a24f7d68a3fbb0b68b919fe2bcbd 100644
--- a/arch/sparc/mm/fault_32.c
+++ b/arch/sparc/mm/fault_32.c
@@ -234,7 +234,7 @@ asmlinkage void do_sparc_fault(struct pt_regs *regs, int text_fault, int write,
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- fault = handle_mm_fault(vma, address, flags);
+ fault = handle_mm_fault(vma, address, flags, NULL);
if (fault_signal_pending(fault, regs))
return;
@@ -410,7 +410,7 @@ static void force_user_fault(unsigned long address, int write)
if (!(vma->vm_flags & (VM_READ | VM_EXEC)))
goto bad_area;
}
- switch (handle_mm_fault(vma, address, flags)) {
+ switch (handle_mm_fault(vma, address, flags, NULL)) {
case VM_FAULT_SIGBUS:
case VM_FAULT_OOM:
goto do_sigbus;
diff --git a/arch/sparc/mm/fault_64.c b/arch/sparc/mm/fault_64.c
index a3806614e4dc0e25a25fd6a03433b2ae292547d3..9ebee14ee893ae1191cc4011229a71f5332114db 100644
--- a/arch/sparc/mm/fault_64.c
+++ b/arch/sparc/mm/fault_64.c
@@ -422,7 +422,7 @@ asmlinkage void __kprobes do_sparc64_fault(struct pt_regs *regs)
goto bad_area;
}
- fault = handle_mm_fault(vma, address, flags);
+ fault = handle_mm_fault(vma, address, flags, NULL);
if (fault_signal_pending(fault, regs))
goto exit_exception;
diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c
index 2b3afa354a9049f7469c7da9185fb123dfc267e5..8d9870d76da12258e56132749ead061b03f018e5 100644
--- a/arch/um/kernel/trap.c
+++ b/arch/um/kernel/trap.c
@@ -71,7 +71,7 @@ int handle_page_fault(unsigned long address, unsigned long ip,
do {
vm_fault_t fault;
- fault = handle_mm_fault(vma, address, flags);
+ fault = handle_mm_fault(vma, address, flags, NULL);
if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current))
goto out_nosemaphore;
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 0c7643d9f7cb30ec561c4f1ebeea6d6bed96f4cc..e1bf5555d80a44cf3924b141d9c47087b8ad910d 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -1291,7 +1291,7 @@ void do_user_addr_fault(struct pt_regs *regs,
* userland). The return to userland is identified whenever
* FAULT_FLAG_USER|FAULT_FLAG_KILLABLE are both set in flags.
*/
- fault = handle_mm_fault(vma, address, flags);
+ fault = handle_mm_fault(vma, address, flags, NULL);
major |= fault & VM_FAULT_MAJOR;
/* Quick path to respond to signals */
diff --git a/arch/xtensa/mm/fault.c b/arch/xtensa/mm/fault.c
index c128dcc7c85b461f4b91cb2f37fedad6ebaf946d..e72c8c1359a6c1863c3b1b82058ac27a7b01ed7f 100644
--- a/arch/xtensa/mm/fault.c
+++ b/arch/xtensa/mm/fault.c
@@ -107,7 +107,7 @@ void do_page_fault(struct pt_regs *regs)
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- fault = handle_mm_fault(vma, address, flags);
+ fault = handle_mm_fault(vma, address, flags, NULL);
if (fault_signal_pending(fault, regs))
return;
diff --git a/drivers/iommu/amd/iommu_v2.c b/drivers/iommu/amd/iommu_v2.c
index e4b025c5637c45bd909c6250fe02eb5f12b48790..c259108ab6dd78fcb0514fd8d6f03240dc21b7d2 100644
--- a/drivers/iommu/amd/iommu_v2.c
+++ b/drivers/iommu/amd/iommu_v2.c
@@ -495,7 +495,7 @@ static void do_fault(struct work_struct *work)
if (access_error(vma, fault))
goto out;
- ret = handle_mm_fault(vma, address, flags);
+ ret = handle_mm_fault(vma, address, flags, NULL);
out:
mmap_read_unlock(mm);
diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c
index 6c87c807a0abb8e3527a996d3d9ba88fd52456fe..5ae59a6ad681500956c4f71e73b2e99e9515eb8e 100644
--- a/drivers/iommu/intel/svm.c
+++ b/drivers/iommu/intel/svm.c
@@ -872,7 +872,8 @@ static irqreturn_t prq_event_thread(int irq, void *d)
goto invalid;
ret = handle_mm_fault(vma, address,
- req->wr_req ? FAULT_FLAG_WRITE : 0);
+ req->wr_req ? FAULT_FLAG_WRITE : 0,
+ NULL);
if (ret & VM_FAULT_ERROR)
goto invalid;
diff --git a/include/linux/mm.h b/include/linux/mm.h
index f97b10117d44d1d1a561fc53231ef00a6f3662b3..ec0ffb423769244e34703bc27f869668775a993e 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -38,6 +38,7 @@ struct file_ra_state;
struct user_struct;
struct writeback_control;
struct bdi_writeback;
+struct pt_regs;
void init_mm_internals(void);
@@ -1658,7 +1659,8 @@ int invalidate_inode_page(struct page *page);
#ifdef CONFIG_MMU
extern vm_fault_t handle_mm_fault(struct vm_area_struct *vma,
- unsigned long address, unsigned int flags);
+ unsigned long address, unsigned int flags,
+ struct pt_regs *regs);
extern int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm,
unsigned long address, unsigned int fault_flags,
bool *unlocked);
@@ -1668,7 +1670,8 @@ void unmap_mapping_range(struct address_space *mapping,
loff_t const holebegin, loff_t const holelen, int even_cows);
#else
static inline vm_fault_t handle_mm_fault(struct vm_area_struct *vma,
- unsigned long address, unsigned int flags)
+ unsigned long address, unsigned int flags,
+ struct pt_regs *regs)
{
/* should never happen if there's no MMU */
BUG();
diff --git a/mm/gup.c b/mm/gup.c
index e9d1d0cc18f05726ef2681495b5734ab8eb2a826..ae7121d729fa784b3b88e2829d125c8217647d56 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -884,7 +884,7 @@ static int faultin_page(struct task_struct *tsk, struct vm_area_struct *vma,
fault_flags |= FAULT_FLAG_TRIED;
}
- ret = handle_mm_fault(vma, address, fault_flags);
+ ret = handle_mm_fault(vma, address, fault_flags, NULL);
if (ret & VM_FAULT_ERROR) {
int err = vm_fault_to_errno(ret, *flags);
@@ -1238,7 +1238,7 @@ int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm,
fatal_signal_pending(current))
return -EINTR;
- ret = handle_mm_fault(vma, address, fault_flags);
+ ret = handle_mm_fault(vma, address, fault_flags, NULL);
major |= ret & VM_FAULT_MAJOR;
if (ret & VM_FAULT_ERROR) {
int err = vm_fault_to_errno(ret, 0);
diff --git a/mm/hmm.c b/mm/hmm.c
index bb279319bf4057674a8a52203ff04617bbf49eab..943cb2ba444232565a696e5550ec9f22bd96f4fa 100644
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -75,7 +75,8 @@ static int hmm_vma_fault(unsigned long addr, unsigned long end,
}
for (; addr < end; addr += PAGE_SIZE)
- if (handle_mm_fault(vma, addr, fault_flags) & VM_FAULT_ERROR)
+ if (handle_mm_fault(vma, addr, fault_flags, NULL) &
+ VM_FAULT_ERROR)
return -EFAULT;
return -EBUSY;
}
diff --git a/mm/ksm.c b/mm/ksm.c
index 217842a66912f2e88704c7ae33058b6163fbc475..0aa2247bddd76dbee9099f2df7f46542f7d6e7e4 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -480,7 +480,8 @@ static int break_ksm(struct vm_area_struct *vma, unsigned long addr)
break;
if (PageKsm(page))
ret = handle_mm_fault(vma, addr,
- FAULT_FLAG_WRITE | FAULT_FLAG_REMOTE);
+ FAULT_FLAG_WRITE | FAULT_FLAG_REMOTE,
+ NULL);
else
ret = VM_FAULT_WRITE;
put_page(page);
diff --git a/mm/memory.c b/mm/memory.c
index 325bb575e7ec3e531c56a1a6c1d61052d825265a..9b7d35734caaf262c27d6da39e4150225d19afd9 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -71,6 +71,8 @@
#include <linux/dax.h>
#include <linux/oom.h>
#include <linux/numa.h>
+#include <linux/perf_event.h>
+#include <linux/ptrace.h>
#include <trace/events/kmem.h>
@@ -4356,6 +4358,64 @@ static vm_fault_t __handle_mm_fault(struct vm_area_struct *vma,
return handle_pte_fault(&vmf);
}
+/**
+ * mm_account_fault - Do page fault accountings
+ *
+ * @regs: the pt_regs struct pointer. When set to NULL, will skip accounting
+ * of perf event counters, but we'll still do the per-task accounting to
+ * the task who triggered this page fault.
+ * @address: the faulted address.
+ * @flags: the fault flags.
+ * @ret: the fault retcode.
+ *
+ * This will take care of most of the page fault accountings. Meanwhile, it
+ * will also include the PERF_COUNT_SW_PAGE_FAULTS_[MAJ|MIN] perf counter
+ * updates. However note that the handling of PERF_COUNT_SW_PAGE_FAULTS should
+ * still be in per-arch page fault handlers at the entry of page fault.
+ */
+static inline void mm_account_fault(struct pt_regs *regs,
+ unsigned long address, unsigned int flags,
+ vm_fault_t ret)
+{
+ bool major;
+
+ /*
+ * We don't do accounting for some specific faults:
+ *
+ * - Unsuccessful faults (e.g. when the address wasn't valid). That
+ * includes arch_vma_access_permitted() failing before reaching here.
+ * So this is not a "this many hardware page faults" counter. We
+ * should use the hw profiling for that.
+ *
+ * - Incomplete faults (VM_FAULT_RETRY). They will only be counted
+ * once they're completed.
+ */
+ if (ret & (VM_FAULT_ERROR | VM_FAULT_RETRY))
+ return;
+
+ /*
+ * We define the fault as a major fault when the final successful fault
+ * is VM_FAULT_MAJOR, or if it retried (which implies that we couldn't
+ * handle it immediately previously).
+ */
+ major = (ret & VM_FAULT_MAJOR) || (flags & FAULT_FLAG_TRIED);
+
+ /*
+ * If the fault is done for GUP, regs will be NULL, and we will skip
+ * the fault accounting.
+ */
+ if (!regs)
+ return;
+
+ if (major) {
+ current->maj_flt++;
+ perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, regs, address);
+ } else {
+ current->min_flt++;
+ perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, regs, address);
+ }
+}
+
/*
* By the time we get here, we already hold the mm semaphore
*
@@ -4363,7 +4423,7 @@ static vm_fault_t __handle_mm_fault(struct vm_area_struct *vma,
* return value. See filemap_fault() and __lock_page_or_retry().
*/
vm_fault_t handle_mm_fault(struct vm_area_struct *vma, unsigned long address,
- unsigned int flags)
+ unsigned int flags, struct pt_regs *regs)
{
vm_fault_t ret;
@@ -4404,6 +4464,8 @@ vm_fault_t handle_mm_fault(struct vm_area_struct *vma, unsigned long address,
mem_cgroup_oom_synchronize(false);
}
+ mm_account_fault(regs, address, flags, ret);
+
return ret;
}
EXPORT_SYMBOL_GPL(handle_mm_fault);