linux-kernel - Re: [RFC][PATCH 4/6] arm, mm: Convert arm to generic tlb

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 09 Mar 2011 16:48:09 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Catalin Marinas <catalin.marinas@....com>
Cc:	Andrea Arcangeli <aarcange@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Rik van Riel <riel@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	akpm@...ux-foundation.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	linux-mm@...ck.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	David Miller <davem@...emloft.net>,
	Hugh Dickins <hugh.dickins@...cali.co.uk>,
	Mel Gorman <mel@....ul.ie>, Nick Piggin <npiggin@...nel.dk>,
	Russell King <rmk@....linux.org.uk>,
	Chris Metcalf <cmetcalf@...era.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>
Subject: Re: [RFC][PATCH 4/6] arm, mm: Convert arm to generic tlb

On Wed, 2011-03-09 at 16:39 +0100, Peter Zijlstra wrote:
> 
> Ok, will try and sort that out. 

We could do something like the below and use the end passed down, which
because it goes top down should be clipped at the appropriate size, just
means touching all the p??_free_tlb() implementations ;-)

Will do on the next iteration ;-)

---

diff --git a/mm/memory.c b/mm/memory.c
index 5823698..833bd90 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -222,11 +222,11 @@ void pmd_clear_bad(pmd_t *pmd)
  * has been handled earlier when unmapping all the memory regions.
  */
 static void free_pte_range(struct mmu_gather *tlb, pmd_t *pmd,
-			   unsigned long addr)
+			   unsigned long addr, unsigned long end)
 {
 	pgtable_t token = pmd_pgtable(*pmd);
 	pmd_clear(pmd);
-	pte_free_tlb(tlb, token, addr);
+	pte_free_tlb(tlb, token, addr, end);
 	tlb->mm->nr_ptes--;
 }
 
@@ -244,7 +244,7 @@ static inline void free_pmd_range(struct mmu_gather *tlb, pud_t *pud,
 		next = pmd_addr_end(addr, end);
 		if (pmd_none_or_clear_bad(pmd))
 			continue;
-		free_pte_range(tlb, pmd, addr);
+		free_pte_range(tlb, pmd, addr, next);
 	} while (pmd++, addr = next, addr != end);
 
 	start &= PUD_MASK;
@@ -260,7 +260,7 @@ static inline void free_pmd_range(struct mmu_gather *tlb, pud_t *pud,
 
 	pmd = pmd_offset(pud, start);
 	pud_clear(pud);
-	pmd_free_tlb(tlb, pmd, start);
+	pmd_free_tlb(tlb, pmd, start, end);
 }
 
 static inline void free_pud_range(struct mmu_gather *tlb, pgd_t *pgd,
@@ -293,7 +293,7 @@ static inline void free_pud_range(struct mmu_gather *tlb, pgd_t *pgd,
 
 	pud = pud_offset(pgd, start);
 	pgd_clear(pgd);
-	pud_free_tlb(tlb, pud, start);
+	pud_free_tlb(tlb, pud, start, end);
 }
 
 /*



--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/