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From: Kevin Wolf <kwolf@redhat.com>
To: qemu-devel@nongnu.org
Cc: kwolf@redhat.com, stefanha@redhat.com
Subject: [Qemu-devel] [PATCH 15/20] rbd: Handle failure for potentially large allocations
Date: Wed, 21 May 2014 18:28:13 +0200	[thread overview]
Message-ID: <1400689698-3096-16-git-send-email-kwolf@redhat.com> (raw)
In-Reply-To: <1400689698-3096-1-git-send-email-kwolf@redhat.com>

Some code in the block layer makes potentially huge allocations. Failure
is not completely unexpected there, so avoid aborting qemu and handle
out-of-memory situations gracefully.

This patch addresses the allocations in the rbd block driver.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 block/rbd.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/block/rbd.c b/block/rbd.c
index dbc79f4..2ac65a8 100644
--- a/block/rbd.c
+++ b/block/rbd.c
@@ -630,7 +630,10 @@ static BlockDriverAIOCB *rbd_start_aio(BlockDriverState *bs,
     if (cmd == RBD_AIO_DISCARD || cmd == RBD_AIO_FLUSH) {
         acb->bounce = NULL;
     } else {
-        acb->bounce = qemu_blockalign(bs, qiov->size);
+        acb->bounce = qemu_try_blockalign(bs, qiov->size);
+        if (acb->bounce == NULL) {
+            goto failed;
+        }
     }
     acb->ret = 0;
     acb->error = 0;
-- 
1.8.3.1

  parent reply	other threads:[~2014-05-21 16:28 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-21 16:27 [Qemu-devel] [PATCH 00/20] block: Handle failure for potentially large allocations Kevin Wolf
2014-05-21 16:27 ` [Qemu-devel] [PATCH 01/20] block: Introduce qemu_try_blockalign() Kevin Wolf
2014-05-22 15:50   ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 02/20] block: Handle failure for potentially large allocations Kevin Wolf
2014-05-22 15:50   ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 03/20] bochs: " Kevin Wolf
2014-05-22 15:52   ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 04/20] cloop: " Kevin Wolf
2014-05-22 15:53   ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 05/20] curl: " Kevin Wolf
2014-05-22 15:54   ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 06/20] dmg: " Kevin Wolf
2014-05-22 15:55   ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 07/20] iscsi: " Kevin Wolf
2014-05-21 20:26   ` Paolo Bonzini
2014-05-22 15:58   ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 08/20] nfs: " Kevin Wolf
2014-05-22 16:00   ` Stefan Hajnoczi
2014-05-22 16:38   ` ronnie sahlberg
2014-05-21 16:28 ` [Qemu-devel] [PATCH 09/20] parallels: " Kevin Wolf
2014-05-22 16:01   ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 10/20] qcow1: " Kevin Wolf
2014-05-22 16:01   ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 11/20] qcow2: " Kevin Wolf
2014-05-22 16:07   ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 12/20] qed: " Kevin Wolf
2014-05-22 16:08   ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 13/20] raw-posix: " Kevin Wolf
2014-05-22 16:08   ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 14/20] raw-win32: " Kevin Wolf
2014-05-22 16:09   ` Stefan Hajnoczi
2014-05-21 16:28 ` Kevin Wolf [this message]
2014-05-22 16:10   ` [Qemu-devel] [PATCH 15/20] rbd: " Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 16/20] vdi: " Kevin Wolf
2014-05-22 16:10   ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 17/20] vhdx: " Kevin Wolf
2014-05-22 16:11   ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 18/20] vmdk: " Kevin Wolf
2014-05-22 16:11   ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 19/20] vpc: " Kevin Wolf
2014-05-22 16:11   ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 20/20] mirror: " Kevin Wolf
2014-05-22 16:11   ` Stefan Hajnoczi

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