# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1201001543 0
# Node ID d13ebcc0013dd6f5b9beb3c9503cf08fff57337b
# Parent 8aa1cae76e082b45b7f073e036197ad1898ffa6e
Avoid allocations causing swap activity on the resume path by allowing
such allocations to access the emergency pools otherwise a
save/restore/migration of a guest which is low on memory can
deadlock.
Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
linux-2.6.18-xen changeset: 377:e8b49cfbdac0c5ee680cd9ec3d693ed0e2d42432
linux-2.6.18-xen date: Mon Jan 14 15:52:23 2008 +0000
---
linux-2.6-xen-sparse/drivers/xen/blkfront/blkfront.c | 2 +-
linux-2.6-xen-sparse/drivers/xen/netfront/netfront.c | 4 ++--
linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_client.c | 2 +-
linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_xs.c | 12 ++++++------
4 files changed, 10 insertions(+), 10 deletions(-)
diff -r 8aa1cae76e08 -r d13ebcc0013d
linux-2.6-xen-sparse/drivers/xen/blkfront/blkfront.c
--- a/linux-2.6-xen-sparse/drivers/xen/blkfront/blkfront.c Tue Jan 22
11:27:43 2008 +0000
+++ b/linux-2.6-xen-sparse/drivers/xen/blkfront/blkfront.c Tue Jan 22
11:32:23 2008 +0000
@@ -219,7 +219,7 @@ static int setup_blkring(struct xenbus_d
info->ring_ref = GRANT_INVALID_REF;
- sring = (blkif_sring_t *)__get_free_page(GFP_KERNEL);
+ sring = (blkif_sring_t *)__get_free_page(GFP_KERNEL|__GFP_HIGH);
if (!sring) {
xenbus_dev_fatal(dev, -ENOMEM, "allocating shared ring");
return -ENOMEM;
diff -r 8aa1cae76e08 -r d13ebcc0013d
linux-2.6-xen-sparse/drivers/xen/netfront/netfront.c
--- a/linux-2.6-xen-sparse/drivers/xen/netfront/netfront.c Tue Jan 22
11:27:43 2008 +0000
+++ b/linux-2.6-xen-sparse/drivers/xen/netfront/netfront.c Tue Jan 22
11:32:23 2008 +0000
@@ -498,7 +498,7 @@ static int setup_device(struct xenbus_de
info->tx.sring = NULL;
info->irq = 0;
- txs = (struct netif_tx_sring *)get_zeroed_page(GFP_KERNEL);
+ txs = (struct netif_tx_sring *)get_zeroed_page(GFP_KERNEL|__GFP_HIGH);
if (!txs) {
err = -ENOMEM;
xenbus_dev_fatal(dev, err, "allocating tx ring page");
@@ -514,7 +514,7 @@ static int setup_device(struct xenbus_de
}
info->tx_ring_ref = err;
- rxs = (struct netif_rx_sring *)get_zeroed_page(GFP_KERNEL);
+ rxs = (struct netif_rx_sring *)get_zeroed_page(GFP_KERNEL|__GFP_HIGH);
if (!rxs) {
err = -ENOMEM;
xenbus_dev_fatal(dev, err, "allocating rx ring page");
diff -r 8aa1cae76e08 -r d13ebcc0013d
linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_client.c
--- a/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_client.c Tue Jan 22
11:27:43 2008 +0000
+++ b/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_client.c Tue Jan 22
11:32:23 2008 +0000
@@ -86,7 +86,7 @@ int xenbus_watch_path2(struct xenbus_dev
const char **, unsigned int))
{
int err;
- char *state = kasprintf(GFP_KERNEL, "%s/%s", path, path2);
+ char *state = kasprintf(GFP_KERNEL|__GFP_HIGH, "%s/%s", path, path2);
if (!state) {
xenbus_dev_fatal(dev, -ENOMEM, "allocating path for watch");
return -ENOMEM;
diff -r 8aa1cae76e08 -r d13ebcc0013d
linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_xs.c
--- a/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_xs.c Tue Jan 22
11:27:43 2008 +0000
+++ b/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_xs.c Tue Jan 22
11:32:23 2008 +0000
@@ -291,9 +291,9 @@ static char *join(const char *dir, const
char *buffer;
if (strlen(name) == 0)
- buffer = kasprintf(GFP_KERNEL, "%s", dir);
+ buffer = kasprintf(GFP_KERNEL|__GFP_HIGH, "%s", dir);
else
- buffer = kasprintf(GFP_KERNEL, "%s/%s", dir, name);
+ buffer = kasprintf(GFP_KERNEL|__GFP_HIGH, "%s/%s", dir, name);
return (!buffer) ? ERR_PTR(-ENOMEM) : buffer;
}
@@ -305,7 +305,7 @@ static char **split(char *strings, unsig
*num = count_strings(strings, len);
/* Transfer to one big alloc for easy freeing. */
- ret = kmalloc(*num * sizeof(char *) + len, GFP_KERNEL);
+ ret = kmalloc(*num * sizeof(char *) + len, GFP_KERNEL|__GFP_HIGH);
if (!ret) {
kfree(strings);
return ERR_PTR(-ENOMEM);
@@ -506,7 +506,7 @@ int xenbus_printf(struct xenbus_transact
#define PRINTF_BUFFER_SIZE 4096
char *printf_buffer;
- printf_buffer = kmalloc(PRINTF_BUFFER_SIZE, GFP_KERNEL);
+ printf_buffer = kmalloc(PRINTF_BUFFER_SIZE, GFP_KERNEL|__GFP_HIGH);
if (printf_buffer == NULL)
return -ENOMEM;
@@ -775,7 +775,7 @@ static int process_msg(void)
}
- msg = kmalloc(sizeof(*msg), GFP_KERNEL);
+ msg = kmalloc(sizeof(*msg), GFP_KERNEL|__GFP_HIGH);
if (msg == NULL) {
err = -ENOMEM;
goto out;
@@ -787,7 +787,7 @@ static int process_msg(void)
goto out;
}
- body = kmalloc(msg->hdr.len + 1, GFP_KERNEL);
+ body = kmalloc(msg->hdr.len + 1, GFP_KERNEL|__GFP_HIGH);
if (body == NULL) {
kfree(msg);
err = -ENOMEM;
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