From: Kirti Wankhede <kwankhede@nvidia.com>
To: <alex.williamson@redhat.com>, <pbonzini@redhat.com>,
<kraxel@redhat.com>, <cjia@nvidia.com>
Cc: <qemu-devel@nongnu.org>, <kvm@vger.kernel.org>,
<kevin.tian@intel.com>, <jike.song@intel.com>,
<bjsdjshi@linux.vnet.ibm.com>, <linux-kernel@vger.kernel.org>,
Kirti Wankhede <kwankhede@nvidia.com>
Subject: [PATCH v13 06/22] vfio iommu type1: Update arguments of vfio_lock_acct
Date: Tue, 15 Nov 2016 20:59:49 +0530 [thread overview]
Message-ID: <1479223805-22895-7-git-send-email-kwankhede@nvidia.com> (raw)
In-Reply-To: <1479223805-22895-1-git-send-email-kwankhede@nvidia.com>
Added task structure as input argument to vfio_lock_acct() function.
Signed-off-by: Kirti Wankhede <kwankhede@nvidia.com>
Signed-off-by: Neo Jia <cjia@nvidia.com>
Change-Id: I5d3673cc9d3786bb436b395d5f74537f1a36da80
---
drivers/vfio/vfio_iommu_type1.c | 30 ++++++++++++++++--------------
1 file changed, 16 insertions(+), 14 deletions(-)
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 9f3d58d3dfaf..34d17e51dc97 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -150,17 +150,22 @@ static void vfio_lock_acct_bg(struct work_struct *work)
kfree(vwork);
}
-static void vfio_lock_acct(long npage)
+static void vfio_lock_acct(struct task_struct *task, long npage)
{
struct vwork *vwork;
struct mm_struct *mm;
- if (!current->mm || !npage)
+ if (!npage)
+ return;
+
+ mm = get_task_mm(task);
+ if (!mm)
return; /* process exited or nothing to do */
- if (down_write_trylock(¤t->mm->mmap_sem)) {
- current->mm->locked_vm += npage;
- up_write(¤t->mm->mmap_sem);
+ if (down_write_trylock(&mm->mmap_sem)) {
+ mm->locked_vm += npage;
+ up_write(&mm->mmap_sem);
+ mmput(mm);
return;
}
@@ -170,11 +175,8 @@ static void vfio_lock_acct(long npage)
* wouldn't need this silliness
*/
vwork = kmalloc(sizeof(struct vwork), GFP_KERNEL);
- if (!vwork)
- return;
- mm = get_task_mm(current);
- if (!mm) {
- kfree(vwork);
+ if (!vwork) {
+ mmput(mm);
return;
}
INIT_WORK(&vwork->work, vfio_lock_acct_bg);
@@ -285,7 +287,7 @@ static long vfio_pin_pages_remote(unsigned long vaddr, long npage,
if (unlikely(disable_hugepages)) {
if (!rsvd)
- vfio_lock_acct(1);
+ vfio_lock_acct(current, 1);
return 1;
}
@@ -313,7 +315,7 @@ static long vfio_pin_pages_remote(unsigned long vaddr, long npage,
}
if (!rsvd)
- vfio_lock_acct(i);
+ vfio_lock_acct(current, i);
return i;
}
@@ -328,7 +330,7 @@ static long vfio_unpin_pages_remote(unsigned long pfn, long npage,
unlocked += put_pfn(pfn++, prot);
if (do_accounting)
- vfio_lock_acct(-unlocked);
+ vfio_lock_acct(current, -unlocked);
return unlocked;
}
@@ -390,7 +392,7 @@ static void vfio_unmap_unpin(struct vfio_iommu *iommu, struct vfio_dma *dma)
cond_resched();
}
- vfio_lock_acct(-unlocked);
+ vfio_lock_acct(current, -unlocked);
}
static void vfio_remove_dma(struct vfio_iommu *iommu, struct vfio_dma *dma)
--
2.7.0
next prev parent reply other threads:[~2016-11-15 15:36 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-15 15:29 [PATCH v13 00/22] Add Mediated device support Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 01/22] vfio: Mediated device Core driver Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 02/22] vfio: VFIO based driver for Mediated devices Kirti Wankhede
[not found] ` <20161116022958.GA5531@bjsdjshi@linux.vnet.ibm.com>
2016-11-16 15:05 ` Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 03/22] vfio: Rearrange functions to get vfio_group from dev Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 04/22] vfio: Common function to increment container_users Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 05/22] vfio iommu: Added pin and unpin callback functions to vfio_iommu_driver_ops Kirti Wankhede
[not found] ` <20161116030328.GB5531@bjsdjshi@linux.vnet.ibm.com>
2016-11-16 15:06 ` Kirti Wankhede
2016-11-15 15:29 ` Kirti Wankhede [this message]
2016-11-15 15:29 ` [PATCH v13 07/22] vfio iommu type1: Update argument of vaddr_get_pfn() Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 08/22] vfio iommu type1: Add find_iommu_group() function Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 09/22] vfio iommu type1: Add task structure to vfio_dma Kirti Wankhede
[not found] ` <20161116060628.GC5531@bjsdjshi@linux.vnet.ibm.com>
2016-11-16 15:11 ` Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 10/22] vfio iommu type1: Add support for mediated devices Kirti Wankhede
2016-11-15 20:54 ` Alex Williamson
2016-11-15 15:29 ` [PATCH v13 11/22] vfio iommu: Add blocking notifier to notify DMA_UNMAP Kirti Wankhede
2016-11-15 22:19 ` Alex Williamson
2016-11-16 2:46 ` Kirti Wankhede
2016-11-16 3:16 ` Alex Williamson
2016-11-16 3:25 ` Alex Williamson
2016-11-16 3:43 ` Kirti Wankhede
2016-11-16 3:58 ` Alex Williamson
2016-11-16 4:16 ` Kirti Wankhede
2016-11-16 4:36 ` Alex Williamson
2016-11-16 15:22 ` Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 12/22] vfio: Add notifier callback to parent's ops structure of mdev Kirti Wankhede
[not found] ` <20161116063759.GD5531@bjsdjshi@linux.vnet.ibm.com>
2016-11-16 15:17 ` Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 13/22] vfio: Introduce common function to add capabilities Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 14/22] vfio_pci: Update vfio_pci to use vfio_info_add_capability() Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 15/22] vfio: Introduce vfio_set_irqs_validate_and_prepare() Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 16/22] vfio_pci: Updated to use vfio_set_irqs_validate_and_prepare() Kirti Wankhede
2016-11-15 15:30 ` [PATCH v13 17/22] vfio_platform: " Kirti Wankhede
2016-11-15 15:30 ` [PATCH v13 18/22] vfio: Define device_api strings Kirti Wankhede
2016-11-15 15:30 ` [PATCH v13 19/22] docs: Add Documentation for Mediated devices Kirti Wankhede
2016-11-15 15:30 ` [PATCH v13 20/22] docs: Sysfs ABI for mediated device framework Kirti Wankhede
2016-11-15 15:30 ` [PATCH v13 21/22] docs: Sample driver to demonstrate how to use Mediated " Kirti Wankhede
2016-11-15 15:30 ` [PATCH v13 22/22] MAINTAINERS: Add entry VFIO based Mediated device drivers Kirti Wankhede
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