From: Leonardo Bras <leonardo@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Cc: Keith Busch <keith.busch@intel.com>,
Richard Fontana <rfontana@redhat.com>,
Paul Mackerras <paulus@samba.org>,
Ira Weiny <ira.weiny@intel.com>,
Dan Williams <dan.j.williams@intel.com>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
YueHaibing <yuehaibing@huawei.com>,
Mike Rapoport <rppt@linux.ibm.com>,
Jason Gunthorpe <jgg@ziepe.ca>,
Ganesh Goudar <ganeshgr@linux.ibm.com>,
Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>,
Leonardo Bras <leonardo@linux.ibm.com>,
Arnd Bergmann <arnd@arndb.de>, John Hubbard <jhubbard@nvidia.com>,
Nicholas Piggin <npiggin@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
Allison Randal <allison@lohutok.net>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH v2 07/11] powerpc/kvm/e500: Applies counting method to monitor lockless pgtbl walks
Date: Fri, 20 Sep 2019 16:50:43 -0300 [thread overview]
Message-ID: <20190920195047.7703-8-leonardo@linux.ibm.com> (raw)
In-Reply-To: <20190920195047.7703-1-leonardo@linux.ibm.com>
Applies the counting-based method for monitoring lockless pgtable walks on
kvmppc_e500_shadow_map().
Signed-off-by: Leonardo Bras <leonardo@linux.ibm.com>
---
arch/powerpc/kvm/e500_mmu_host.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/powerpc/kvm/e500_mmu_host.c b/arch/powerpc/kvm/e500_mmu_host.c
index 321db0fdb9db..a1b8bfe20bc8 100644
--- a/arch/powerpc/kvm/e500_mmu_host.c
+++ b/arch/powerpc/kvm/e500_mmu_host.c
@@ -473,6 +473,7 @@ static inline int kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500,
* We are holding kvm->mmu_lock so a notifier invalidate
* can't run hence pfn won't change.
*/
+ start_lockless_pgtbl_walk(kvm->mm);
local_irq_save(flags);
ptep = find_linux_pte(pgdir, hva, NULL, NULL);
if (ptep) {
@@ -484,12 +485,15 @@ static inline int kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500,
local_irq_restore(flags);
} else {
local_irq_restore(flags);
+ end_lockless_pgtbl_walk(kvm->mm);
pr_err_ratelimited("%s: pte not present: gfn %lx,pfn %lx\n",
__func__, (long)gfn, pfn);
ret = -EINVAL;
goto out;
}
}
+ end_lockless_pgtbl_walk(kvm->mm);
+
kvmppc_e500_ref_setup(ref, gtlbe, pfn, wimg);
kvmppc_e500_setup_stlbe(&vcpu_e500->vcpu, gtlbe, tsize,
--
2.20.1
next prev parent reply other threads:[~2019-09-20 20:11 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-20 19:50 [PATCH v2 00/11] Introduces new count-based method for monitoring lockless pagetable wakls Leonardo Bras
2019-09-20 19:50 ` [PATCH v2 01/11] powerpc/mm: Adds counting method to monitor lockless pgtable walks Leonardo Bras
2019-09-23 20:42 ` John Hubbard
2019-09-23 20:50 ` Leonardo Bras
2019-09-20 19:50 ` [PATCH v2 02/11] asm-generic/pgtable: Adds dummy functions " Leonardo Bras
2019-09-23 20:39 ` John Hubbard
2019-09-23 20:48 ` Leonardo Bras
2019-09-23 20:53 ` John Hubbard
2019-09-20 19:50 ` [PATCH v2 03/11] mm/gup: Applies counting method to monitor gup_pgd_range Leonardo Bras
2019-09-23 20:27 ` John Hubbard
2019-09-23 21:01 ` Leonardo Bras
2019-09-23 21:09 ` John Hubbard
2019-09-20 19:50 ` [PATCH v2 04/11] powerpc/mce_power: Applies counting method to monitor lockless pgtbl walks Leonardo Bras
2019-09-20 19:50 ` [PATCH v2 05/11] powerpc/perf: " Leonardo Bras
2019-09-20 19:50 ` [PATCH v2 06/11] powerpc/mm/book3s64/hash: " Leonardo Bras
2019-09-20 19:50 ` Leonardo Bras [this message]
2019-09-20 19:50 ` [PATCH v2 08/11] powerpc/kvm/book3s_hv: " Leonardo Bras
2019-09-23 20:47 ` John Hubbard
2019-09-20 19:50 ` [PATCH v2 09/11] powerpc/kvm/book3s_64: " Leonardo Bras
2019-09-20 19:50 ` [PATCH v2 10/11] powerpc/book3s_64: Enables counting method to monitor lockless pgtbl walk Leonardo Bras
2019-09-20 19:50 ` [PATCH v2 11/11] powerpc/mm/book3s64/pgtable: Uses counting method to skip serializing Leonardo Bras
2019-09-20 20:11 ` John Hubbard
2019-09-20 20:28 ` Leonardo Bras
2019-09-20 21:15 ` John Hubbard
2019-09-21 0:48 ` John Hubbard
2019-09-23 17:25 ` Leonardo Bras
2019-09-23 18:14 ` John Hubbard
2019-09-23 19:40 ` Leonardo Bras
2019-09-23 19:58 ` John Hubbard
2019-09-23 20:23 ` Leonardo Bras
2019-09-23 20:26 ` John Hubbard
2019-09-20 19:56 ` [PATCH v2 00/11] Introduces new count-based method for monitoring lockless pagetable wakls Leonardo Bras
2019-09-20 20:12 ` Leonardo Bras
2019-09-20 21:24 ` John Hubbard
2019-09-23 20:51 ` John Hubbard
2019-09-23 20:58 ` Leonardo Bras
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