From: Chris Wilson <chris@chris-wilson.co.uk>
To: Joerg Roedel <jroedel@suse.de>
Cc: linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org,
linux-mm@kvack.org, Pavel Machek <pavel@ucw.cz>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Dave Airlie <airlied@redhat.com>,
Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@intel.com>,
David Vrabel <david.vrabel@citrix.com>,
stable@vger.kernel.org
Subject: Re: [PATCH] mm: Track page table modifications in __apply_to_page_range() construction
Date: Fri, 21 Aug 2020 11:13:36 +0100 [thread overview]
Message-ID: <159800481672.29194.17217138842959831589@build.alporthouse.com> (raw)
In-Reply-To: <20200821100902.GG3354@suse.de>
Quoting Joerg Roedel (2020-08-21 11:09:02)
> @@ -2333,6 +2339,7 @@ static int __apply_to_page_range(struct mm_struct *mm, unsigned long addr,
> pgd_t *pgd;
> unsigned long next;
> unsigned long end = addr + size;
> + pgtbl_mod_mask mask = 0;
> int err = 0;
>
> if (WARN_ON(addr >= end))
> @@ -2343,11 +2350,14 @@ static int __apply_to_page_range(struct mm_struct *mm, unsigned long addr,
> next = pgd_addr_end(addr, end);
> if (!create && pgd_none_or_clear_bad(pgd))
> continue;
> - err = apply_to_p4d_range(mm, pgd, addr, next, fn, data, create);
> + err = apply_to_p4d_range(mm, pgd, addr, next, fn, data, create, &mask);
> if (err)
> break;
> } while (pgd++, addr = next, addr != end);
>
> + if (mask & ARCH_PAGE_TABLE_SYNC_MASK)
> + arch_sync_kernel_mappings(addr, addr + size);
We need to store the initial addr, as here addr == end [or earlier on
earlier], so range is (start, addr).
-Chris
next prev parent reply other threads:[~2020-08-21 10:13 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-21 8:50 [PATCH 1/4] mm: Export flush_vm_area() to sync the PTEs upon construction Chris Wilson
2020-08-21 8:50 ` [PATCH 2/4] drm/i915/gem: Sync the vmap " Chris Wilson
2020-08-21 12:41 ` Linus Torvalds
2020-08-21 13:01 ` Chris Wilson
2020-08-21 8:50 ` [PATCH 3/4] drm/i915/gem: Use set_pte_at() for assigning the vmapped PTE Chris Wilson
2020-08-21 8:50 ` [PATCH 4/4] drm/i915/gem: Replace reloc chain with terminator on error unwind Chris Wilson
2020-08-21 9:51 ` [PATCH 1/4] mm: Export flush_vm_area() to sync the PTEs upon construction Joerg Roedel
2020-08-21 9:54 ` Chris Wilson
2020-08-21 10:22 ` Joerg Roedel
2020-08-21 10:36 ` Chris Wilson
2020-08-21 10:09 ` [PATCH] mm: Track page table modifications in __apply_to_page_range() construction Joerg Roedel
2020-08-21 10:13 ` Chris Wilson [this message]
2020-08-21 10:23 ` Joerg Roedel
2020-08-21 10:39 ` Chris Wilson
2020-08-21 11:38 ` Chris Wilson
2020-08-21 12:18 ` Joerg Roedel
2020-08-21 10:53 ` Greg KH
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