| Message ID | 1484114308-6068-1-git-send-email-shijie.huang@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Wed, Jan 11, 2017 at 01:58:28PM +0800, Huang Shijie wrote: > In current code, the @changed always returns the last one's > status for the huge page with the contiguous bit set. > This is really not what we want. Even one of the PTEs is changed, > we should tell it to the caller. > > This patch fixes this issue. > > Fixes: 66b3923a1a0f ("arm64: hugetlb: add support for PTE contiguous bit") > Cc: stable@vger.kernel.org > Signed-off-by: Huang Shijie <shijie.huang@arm.com> > --- > arch/arm64/mm/hugetlbpage.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c > index 964b7549af5c..e25584d72396 100644 > --- a/arch/arm64/mm/hugetlbpage.c > +++ b/arch/arm64/mm/hugetlbpage.c > @@ -239,7 +239,7 @@ int huge_ptep_set_access_flags(struct vm_area_struct *vma, > ncontig = find_num_contig(vma->vm_mm, addr, cpte, > *cpte, &pgsize); > for (i = 0; i < ncontig; ++i, ++cpte, addr += pgsize) { > - changed = ptep_set_access_flags(vma, addr, cpte, > + changed |= ptep_set_access_flags(vma, addr, cpte, > pfn_pte(pfn, > hugeprot), > dirty); > -- > 2.5.5 > sorry, I missed to remove the disclaimer. Huang Shijie
On Wed, Jan 11, 2017 at 02:00:46PM +0800, Huang Shijie wrote: > On Wed, Jan 11, 2017 at 01:58:28PM +0800, Huang Shijie wrote: > > In current code, the @changed always returns the last one's > > status for the huge page with the contiguous bit set. > > This is really not what we want. Even one of the PTEs is changed, > > we should tell it to the caller. > > > > This patch fixes this issue. > > > > Fixes: 66b3923a1a0f ("arm64: hugetlb: add support for PTE contiguous bit") > > Cc: stable@vger.kernel.org > > Signed-off-by: Huang Shijie <shijie.huang@arm.com> > > --- > > arch/arm64/mm/hugetlbpage.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c > > index 964b7549af5c..e25584d72396 100644 > > --- a/arch/arm64/mm/hugetlbpage.c > > +++ b/arch/arm64/mm/hugetlbpage.c > > @@ -239,7 +239,7 @@ int huge_ptep_set_access_flags(struct vm_area_struct *vma, > > ncontig = find_num_contig(vma->vm_mm, addr, cpte, > > *cpte, &pgsize); > > for (i = 0; i < ncontig; ++i, ++cpte, addr += pgsize) { > > - changed = ptep_set_access_flags(vma, addr, cpte, > > + changed |= ptep_set_access_flags(vma, addr, cpte, > > pfn_pte(pfn, > > hugeprot), > > dirty); > > -- > > 2.5.5 > > > sorry, I missed to remove the disclaimer. The disclaimer is not the main issue. The patch that ended up on the list seems to have been corrupted probably by the SMTP server (all tabs converted to spaces).
On Wed, Jan 11, 2017 at 10:19:25AM +0000, Catalin Marinas wrote: > The disclaimer is not the main issue. The patch that ended up on the > list seems to have been corrupted probably by the SMTP server (all tabs > converted to spaces). Thanks for pointing this. I will change another SMTP server if the issue still exists in future. Thanks Huang Shijie
diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c index 964b7549af5c..e25584d72396 100644 --- a/arch/arm64/mm/hugetlbpage.c +++ b/arch/arm64/mm/hugetlbpage.c @@ -239,7 +239,7 @@ int huge_ptep_set_access_flags(struct vm_area_struct *vma, ncontig = find_num_contig(vma->vm_mm, addr, cpte, *cpte, &pgsize); for (i = 0; i < ncontig; ++i, ++cpte, addr += pgsize) { - changed = ptep_set_access_flags(vma, addr, cpte, + changed |= ptep_set_access_flags(vma, addr, cpte, pfn_pte(pfn, hugeprot), dirty);
In current code, the @changed always returns the last one's status for the huge page with the contiguous bit set. This is really not what we want. Even one of the PTEs is changed, we should tell it to the caller. This patch fixes this issue. Fixes: 66b3923a1a0f ("arm64: hugetlb: add support for PTE contiguous bit") Cc: stable@vger.kernel.org Signed-off-by: Huang Shijie <shijie.huang@arm.com> --- arch/arm64/mm/hugetlbpage.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) -- 2.5.5 IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.