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From: Anshuman Khandual <anshuman.khandual@arm.com>
To: linux-mm@kvack.org
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Heiko Carstens <heiko.carstens@de.ibm.com>,
	Paul Mackerras <paulus@samba.org>,
	"H. Peter Anvin" <hpa@zytor.com>,
	linux-riscv@lists.infradead.org, Will Deacon <will@kernel.org>,
	linux-arch@vger.kernel.org, linux-s390@vger.kernel.org,
	Michael Ellerman <mpe@ellerman.id.au>,
	x86@kernel.org, Mike Rapoport <rppt@linux.ibm.com>,
	Christian Borntraeger <borntraeger@de.ibm.com>,
	Ingo Molnar <mingo@redhat.com>,
	linux-arm-kernel@lists.infradead.org, ziy@nvidia.com,
	Catalin Marinas <catalin.marinas@arm.com>,
	linux-snps-arc@lists.infradead.org,
	Vasily Gorbik <gor@linux.ibm.com>,
	Anshuman Khandual <anshuman.khandual@arm.com>,
	Borislav Petkov <bp@alien8.de>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	"Kirill A . Shutemov" <kirill@shutemov.name>,
	Thomas Gleixner <tglx@linutronix.de>,
	gerald.schaefer@de.ibm.com, christophe.leroy@c-s.fr,
	Vineet Gupta <vgupta@synopsys.com>,
	linux-kernel@vger.kernel.org, Palmer Dabbelt <palmer@dabbelt.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	linuxppc-dev@lists.ozlabs.org
Subject: [PATCH V3 3/4] mm/debug_vm_pgtable: Add debug prints for individual tests
Date: Mon, 15 Jun 2020 09:07:56 +0530
Message-ID: <1592192277-8421-4-git-send-email-anshuman.khandual@arm.com> (raw)
In-Reply-To: <1592192277-8421-1-git-send-email-anshuman.khandual@arm.com>

This adds debug print information that enlists all tests getting executed
on a given platform. With dynamic debug enabled, the following information
will be splashed during boot. For compactness purpose, dropped both time
stamp and prefix (i.e debug_vm_pgtable) from this sample output.

[debug_vm_pgtable      ]: Validating architecture page table helpers
[pte_basic_tests       ]: Validating PTE basic
[pmd_basic_tests       ]: Validating PMD basic
[p4d_basic_tests       ]: Validating P4D basic
[pgd_basic_tests       ]: Validating PGD basic
[pte_clear_tests       ]: Validating PTE clear
[pmd_clear_tests       ]: Validating PMD clear
[pte_advanced_tests    ]: Validating PTE advanced
[pmd_advanced_tests    ]: Validating PMD advanced
[hugetlb_advanced_tests]: Validating HugeTLB advanced
[pmd_leaf_tests        ]: Validating PMD leaf
[pmd_huge_tests        ]: Validating PMD huge
[pte_savedwrite_tests  ]: Validating PTE saved write
[pmd_savedwrite_tests  ]: Validating PMD saved write
[pmd_populate_tests    ]: Validating PMD populate
[pte_special_tests     ]: Validating PTE special
[pte_protnone_tests    ]: Validating PTE protnone
[pmd_protnone_tests    ]: Validating PMD protnone
[pte_devmap_tests      ]: Validating PTE devmap
[pmd_devmap_tests      ]: Validating PMD devmap
[pte_swap_tests        ]: Validating PTE swap
[swap_migration_tests  ]: Validating swap migration
[hugetlb_basic_tests   ]: Validating HugeTLB basic
[pmd_thp_tests         ]: Validating PMD based THP

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: linux-snps-arc@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-s390@vger.kernel.org
Cc: linux-riscv@lists.infradead.org
Cc: x86@kernel.org
Cc: linux-mm@kvack.org
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
 mm/debug_vm_pgtable.c | 46 ++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 45 insertions(+), 1 deletion(-)

diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c
index e3f9f8317a98..536f3b1b3ad6 100644
--- a/mm/debug_vm_pgtable.c
+++ b/mm/debug_vm_pgtable.c
@@ -8,7 +8,7 @@
  *
  * Author: Anshuman Khandual <anshuman.khandual@arm.com>
  */
-#define pr_fmt(fmt) "debug_vm_pgtable: %s: " fmt, __func__
+#define pr_fmt(fmt) "debug_vm_pgtable: [%-25s]: " fmt, __func__
 
 #include <linux/gfp.h>
 #include <linux/highmem.h>
@@ -48,6 +48,7 @@ static void __init pte_basic_tests(unsigned long pfn, pgprot_t prot)
 {
 	pte_t pte = pfn_pte(pfn, prot);
 
+	pr_debug("Validating PTE basic\n");
 	WARN_ON(!pte_same(pte, pte));
 	WARN_ON(!pte_young(pte_mkyoung(pte_mkold(pte))));
 	WARN_ON(!pte_dirty(pte_mkdirty(pte_mkclean(pte))));
@@ -63,6 +64,7 @@ static void __init pte_advanced_tests(struct mm_struct *mm,
 {
 	pte_t pte = pfn_pte(pfn, prot);
 
+	pr_debug("Validating PTE advanced\n");
 	pte = pfn_pte(pfn, prot);
 	set_pte_at(mm, vaddr, ptep, pte);
 	ptep_set_wrprotect(mm, vaddr, ptep);
@@ -102,6 +104,7 @@ static void __init pte_savedwrite_tests(unsigned long pfn, pgprot_t prot)
 {
 	pte_t pte = pfn_pte(pfn, prot);
 
+	pr_debug("Validating PTE saved write\n");
 	WARN_ON(!pte_savedwrite(pte_mk_savedwrite(pte_clear_savedwrite(pte))));
 	WARN_ON(pte_savedwrite(pte_clear_savedwrite(pte_mk_savedwrite(pte))));
 }
@@ -113,6 +116,7 @@ static void __init pmd_basic_tests(unsigned long pfn, pgprot_t prot)
 	if (!has_transparent_hugepage())
 		return;
 
+	pr_debug("Validating PMD basic\n");
 	WARN_ON(!pmd_same(pmd, pmd));
 	WARN_ON(!pmd_young(pmd_mkyoung(pmd_mkold(pmd))));
 	WARN_ON(!pmd_dirty(pmd_mkdirty(pmd_mkclean(pmd))));
@@ -136,6 +140,7 @@ static void __init pmd_advanced_tests(struct mm_struct *mm,
 	if (!has_transparent_hugepage())
 		return;
 
+	pr_debug("Validating PMD advanced\n");
 	/* Align the address wrt HPAGE_PMD_SIZE */
 	vaddr = (vaddr & HPAGE_PMD_MASK) + HPAGE_PMD_SIZE;
 
@@ -178,6 +183,7 @@ static void __init pmd_leaf_tests(unsigned long pfn, pgprot_t prot)
 {
 	pmd_t pmd = pfn_pmd(pfn, prot);
 
+	pr_debug("Validating PMD leaf\n");
 	/*
 	 * PMD based THP is a leaf entry.
 	 */
@@ -191,6 +197,8 @@ static void __init pmd_huge_tests(pmd_t *pmdp, unsigned long pfn, pgprot_t prot)
 
 	if (!IS_ENABLED(CONFIG_HAVE_ARCH_HUGE_VMAP))
 		return;
+
+	pr_debug("Validating PMD huge\n");
 	/*
 	 * X86 defined pmd_set_huge() verifies that the given
 	 * PMD is not a populated non-leaf entry.
@@ -206,6 +214,7 @@ static void __init pmd_savedwrite_tests(unsigned long pfn, pgprot_t prot)
 {
 	pmd_t pmd = pfn_pmd(pfn, prot);
 
+	pr_debug("Validating PMD saved write\n");
 	WARN_ON(!pmd_savedwrite(pmd_mk_savedwrite(pmd_clear_savedwrite(pmd))));
 	WARN_ON(pmd_savedwrite(pmd_clear_savedwrite(pmd_mk_savedwrite(pmd))));
 }
@@ -218,6 +227,7 @@ static void __init pud_basic_tests(unsigned long pfn, pgprot_t prot)
 	if (!has_transparent_hugepage())
 		return;
 
+	pr_debug("Validating PUD basic\n");
 	WARN_ON(!pud_same(pud, pud));
 	WARN_ON(!pud_young(pud_mkyoung(pud_mkold(pud))));
 	WARN_ON(!pud_write(pud_mkwrite(pud_wrprotect(pud))));
@@ -243,6 +253,7 @@ static void pud_advanced_tests(struct mm_struct *mm,
 	if (!has_transparent_hugepage())
 		return;
 
+	pr_debug("Validating PUD advanced\n");
 	/* Align the address wrt HPAGE_PUD_SIZE */
 	vaddr = (vaddr & HPAGE_PUD_MASK) + HPAGE_PUD_SIZE;
 
@@ -285,6 +296,7 @@ static void __init pud_leaf_tests(unsigned long pfn, pgprot_t prot)
 {
 	pud_t pud = pfn_pud(pfn, prot);
 
+	pr_debug("Validating PUD leaf\n");
 	/*
 	 * PUD based THP is a leaf entry.
 	 */
@@ -298,6 +310,8 @@ static void __init pud_huge_tests(pud_t *pudp, unsigned long pfn, pgprot_t prot)
 
 	if (!IS_ENABLED(CONFIG_HAVE_ARCH_HUGE_VMAP))
 		return;
+
+	pr_debug("Validating PUD huge\n");
 	/*
 	 * X86 defined pud_set_huge() verifies that the given
 	 * PUD is not a populated non-leaf entry.
@@ -348,6 +362,7 @@ static void __init p4d_basic_tests(unsigned long pfn, pgprot_t prot)
 {
 	p4d_t p4d;
 
+	pr_debug("Validating P4D basic\n");
 	memset(&p4d, RANDOM_NZVALUE, sizeof(p4d_t));
 	WARN_ON(!p4d_same(p4d, p4d));
 }
@@ -356,6 +371,7 @@ static void __init pgd_basic_tests(unsigned long pfn, pgprot_t prot)
 {
 	pgd_t pgd;
 
+	pr_debug("Validating PGD basic\n");
 	memset(&pgd, RANDOM_NZVALUE, sizeof(pgd_t));
 	WARN_ON(!pgd_same(pgd, pgd));
 }
@@ -368,6 +384,7 @@ static void __init pud_clear_tests(struct mm_struct *mm, pud_t *pudp)
 	if (mm_pmd_folded(mm))
 		return;
 
+	pr_debug("Validating PUD clear\n");
 	pud = __pud(pud_val(pud) | RANDOM_ORVALUE);
 	WRITE_ONCE(*pudp, pud);
 	pud_clear(pudp);
@@ -382,6 +399,8 @@ static void __init pud_populate_tests(struct mm_struct *mm, pud_t *pudp,
 
 	if (mm_pmd_folded(mm))
 		return;
+
+	pr_debug("Validating PUD populate\n");
 	/*
 	 * This entry points to next level page table page.
 	 * Hence this must not qualify as pud_bad().
@@ -408,6 +427,7 @@ static void __init p4d_clear_tests(struct mm_struct *mm, p4d_t *p4dp)
 	if (mm_pud_folded(mm))
 		return;
 
+	pr_debug("Validating P4D clear\n");
 	p4d = __p4d(p4d_val(p4d) | RANDOM_ORVALUE);
 	WRITE_ONCE(*p4dp, p4d);
 	p4d_clear(p4dp);
@@ -423,6 +443,7 @@ static void __init p4d_populate_tests(struct mm_struct *mm, p4d_t *p4dp,
 	if (mm_pud_folded(mm))
 		return;
 
+	pr_debug("Validating P4D populate\n");
 	/*
 	 * This entry points to next level page table page.
 	 * Hence this must not qualify as p4d_bad().
@@ -441,6 +462,7 @@ static void __init pgd_clear_tests(struct mm_struct *mm, pgd_t *pgdp)
 	if (mm_p4d_folded(mm))
 		return;
 
+	pr_debug("Validating PGD clear\n");
 	pgd = __pgd(pgd_val(pgd) | RANDOM_ORVALUE);
 	WRITE_ONCE(*pgdp, pgd);
 	pgd_clear(pgdp);
@@ -456,6 +478,7 @@ static void __init pgd_populate_tests(struct mm_struct *mm, pgd_t *pgdp,
 	if (mm_p4d_folded(mm))
 		return;
 
+	pr_debug("Validating PGD populate\n");
 	/*
 	 * This entry points to next level page table page.
 	 * Hence this must not qualify as pgd_bad().
@@ -484,6 +507,7 @@ static void __init pte_clear_tests(struct mm_struct *mm, pte_t *ptep,
 {
 	pte_t pte = READ_ONCE(*ptep);
 
+	pr_debug("Validating PTE clear\n");
 	pte = __pte(pte_val(pte) | RANDOM_ORVALUE);
 	set_pte_at(mm, vaddr, ptep, pte);
 	barrier();
@@ -496,6 +520,7 @@ static void __init pmd_clear_tests(struct mm_struct *mm, pmd_t *pmdp)
 {
 	pmd_t pmd = READ_ONCE(*pmdp);
 
+	pr_debug("Validating PMD clear\n");
 	pmd = __pmd(pmd_val(pmd) | RANDOM_ORVALUE);
 	WRITE_ONCE(*pmdp, pmd);
 	pmd_clear(pmdp);
@@ -508,6 +533,7 @@ static void __init pmd_populate_tests(struct mm_struct *mm, pmd_t *pmdp,
 {
 	pmd_t pmd;
 
+	pr_debug("Validating PMD populate\n");
 	/*
 	 * This entry points to next level page table page.
 	 * Hence this must not qualify as pmd_bad().
@@ -525,6 +551,7 @@ static void __init pte_special_tests(unsigned long pfn, pgprot_t prot)
 	if (!IS_ENABLED(CONFIG_ARCH_HAS_PTE_SPECIAL))
 		return;
 
+	pr_debug("Validating PTE special\n");
 	WARN_ON(!pte_special(pte_mkspecial(pte)));
 }
 
@@ -535,6 +562,7 @@ static void __init pte_protnone_tests(unsigned long pfn, pgprot_t prot)
 	if (!IS_ENABLED(CONFIG_NUMA_BALANCING))
 		return;
 
+	pr_debug("Validating PTE protnone\n");
 	WARN_ON(!pte_protnone(pte));
 	WARN_ON(!pte_present(pte));
 }
@@ -547,6 +575,7 @@ static void __init pmd_protnone_tests(unsigned long pfn, pgprot_t prot)
 	if (!IS_ENABLED(CONFIG_NUMA_BALANCING))
 		return;
 
+	pr_debug("Validating PMD protnone\n");
 	WARN_ON(!pmd_protnone(pmd));
 	WARN_ON(!pmd_present(pmd));
 }
@@ -559,6 +588,7 @@ static void __init pte_devmap_tests(unsigned long pfn, pgprot_t prot)
 {
 	pte_t pte = pfn_pte(pfn, prot);
 
+	pr_debug("Validating PTE devmap\n");
 	WARN_ON(!pte_devmap(pte_mkdevmap(pte)));
 }
 
@@ -567,6 +597,7 @@ static void __init pmd_devmap_tests(unsigned long pfn, pgprot_t prot)
 {
 	pmd_t pmd = pfn_pmd(pfn, prot);
 
+	pr_debug("Validating PMD devmap\n");
 	WARN_ON(!pmd_devmap(pmd_mkdevmap(pmd)));
 }
 
@@ -575,6 +606,7 @@ static void __init pud_devmap_tests(unsigned long pfn, pgprot_t prot)
 {
 	pud_t pud = pfn_pud(pfn, prot);
 
+	pr_debug("Validating PUD devmap\n");
 	WARN_ON(!pud_devmap(pud_mkdevmap(pud)));
 }
 #else  /* !CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
@@ -597,6 +629,7 @@ static void __init pte_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
 	if (!IS_ENABLED(CONFIG_MEM_SOFT_DIRTY))
 		return;
 
+	pr_debug("Validating PTE soft dirty\n");
 	WARN_ON(!pte_soft_dirty(pte_mksoft_dirty(pte)));
 	WARN_ON(pte_soft_dirty(pte_clear_soft_dirty(pte)));
 }
@@ -608,6 +641,7 @@ static void __init pte_swap_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
 	if (!IS_ENABLED(CONFIG_MEM_SOFT_DIRTY))
 		return;
 
+	pr_debug("Validating PTE swap soft dirty\n");
 	WARN_ON(!pte_swp_soft_dirty(pte_swp_mksoft_dirty(pte)));
 	WARN_ON(pte_swp_soft_dirty(pte_swp_clear_soft_dirty(pte)));
 }
@@ -620,6 +654,7 @@ static void __init pmd_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
 	if (!IS_ENABLED(CONFIG_MEM_SOFT_DIRTY))
 		return;
 
+	pr_debug("Validating PMD soft dirty\n");
 	WARN_ON(!pmd_soft_dirty(pmd_mksoft_dirty(pmd)));
 	WARN_ON(pmd_soft_dirty(pmd_clear_soft_dirty(pmd)));
 }
@@ -632,6 +667,7 @@ static void __init pmd_swap_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
 		!IS_ENABLED(CONFIG_ARCH_ENABLE_THP_MIGRATION))
 		return;
 
+	pr_debug("Validating PMD swap soft dirty\n");
 	WARN_ON(!pmd_swp_soft_dirty(pmd_swp_mksoft_dirty(pmd)));
 	WARN_ON(pmd_swp_soft_dirty(pmd_swp_clear_soft_dirty(pmd)));
 }
@@ -647,6 +683,7 @@ static void __init pte_swap_tests(unsigned long pfn, pgprot_t prot)
 	swp_entry_t swp;
 	pte_t pte;
 
+	pr_debug("Validating PTE swap\n");
 	pte = pfn_pte(pfn, prot);
 	swp = __pte_to_swp_entry(pte);
 	pte = __swp_entry_to_pte(swp);
@@ -659,6 +696,7 @@ static void __init pmd_swap_tests(unsigned long pfn, pgprot_t prot)
 	swp_entry_t swp;
 	pmd_t pmd;
 
+	pr_debug("Validating PMD swap\n");
 	pmd = pfn_pmd(pfn, prot);
 	swp = __pmd_to_swp_entry(pmd);
 	pmd = __swp_entry_to_pmd(swp);
@@ -675,6 +713,8 @@ static void __init swap_migration_tests(void)
 
 	if (!IS_ENABLED(CONFIG_MIGRATION))
 		return;
+
+	pr_debug("Validating swap migration\n");
 	/*
 	 * swap_migration_tests() requires a dedicated page as it needs to
 	 * be locked before creating a migration entry from it. Locking the
@@ -714,6 +754,7 @@ static void __init hugetlb_basic_tests(unsigned long pfn, pgprot_t prot)
 	struct page *page;
 	pte_t pte;
 
+	pr_debug("Validating HugeTLB basic\n");
 	/*
 	 * Accessing the page associated with the pfn is safe here,
 	 * as it was previously derived from a real kernel symbol.
@@ -741,6 +782,7 @@ static void __init hugetlb_advanced_tests(struct mm_struct *mm,
 	pte_t pte = READ_ONCE(*ptep);
 	unsigned long paddr = (__pfn_to_phys(pfn) | RANDOM_ORVALUE) & PMD_MASK;
 
+	pr_debug("Validating HugeTLB advanced\n");
 	pte = pte_mkhuge(mk_pte(pfn_to_page(PHYS_PFN(paddr)), prot));
 	set_huge_pte_at(mm, vaddr, ptep, pte);
 	barrier();
@@ -791,6 +833,7 @@ static void __init pmd_thp_tests(unsigned long pfn, pgprot_t prot)
 	if (!has_transparent_hugepage())
 		return;
 
+	pr_debug("Validating PMD based THP\n");
 	/*
 	 * pmd_trans_huge() and pmd_present() must return positive after
 	 * MMU invalidation with pmd_mkinvalid(). This behavior is an
@@ -819,6 +862,7 @@ static void __init pud_thp_tests(unsigned long pfn, pgprot_t prot)
 	if (!has_transparent_hugepage())
 		return;
 
+	pr_debug("Validating PUD based THP\n");
 	pud = pfn_pud(pfn, prot);
 	WARN_ON(!pud_trans_huge(pud_mkhuge(pud)));
 
-- 
2.20.1


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  parent reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-15  3:37 [PATCH V3 0/4] mm/debug_vm_pgtable: Add some more tests Anshuman Khandual
2020-06-15  3:37 ` [PATCH V3 1/4] mm/debug_vm_pgtable: Add tests validating arch helpers for core MM features Anshuman Khandual
2020-06-15  3:37 ` [PATCH V3 2/4] mm/debug_vm_pgtable: Add tests validating advanced arch page table helpers Anshuman Khandual
2020-06-27  7:18   ` Christophe Leroy
2020-06-29  8:09     ` Anshuman Khandual
2020-06-27  7:26   ` Christophe Leroy
2020-06-29  8:15     ` Anshuman Khandual
2020-06-15  3:37 ` Anshuman Khandual [this message]
2020-06-15  3:37 ` [PATCH V3 4/4] Documentation/mm: Add descriptions for " Anshuman Khandual
2020-06-17 10:01   ` Mike Rapoport
2020-06-24  3:13 ` [PATCH V3 0/4] mm/debug_vm_pgtable: Add some more tests Anshuman Khandual
2020-06-24 11:05   ` Alexander Gordeev
2020-06-24 11:48     ` Gerald Schaefer
2020-06-24 14:40       ` Alexander Gordeev
2020-06-29  8:32         ` Anshuman Khandual
2020-06-27  8:17   ` Christophe Leroy
2020-06-30  3:53   ` Anshuman Khandual
2020-06-30 21:32     ` Vineet Gupta
2020-07-03  3:59       ` Anshuman Khandual

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    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux SNPS ARC Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-snps-arc/0 linux-snps-arc/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-snps-arc linux-snps-arc/ https://lore.kernel.org/linux-snps-arc \
		linux-snps-arc@lists.infradead.org
	public-inbox-index linux-snps-arc

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.infradead.lists.linux-snps-arc


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git