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| author | Kevin Wolf <kwolf@redhat.com> | 2014-05-20 13:39:57 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2014-08-15 15:07:15 +0200 |
| commit | 4f4896db5fb2285df016ff927508560c89b845a4 (patch) | |
| tree | 3a14768c8f0471344705dfcdc303917dba1fff37 /block/qed.c | |
| parent | de82815db1c89da058b7fb941dab137d6d9ab738 (diff) | |
| download | qemu-4f4896db5fb2285df016ff927508560c89b845a4.zip qemu-4f4896db5fb2285df016ff927508560c89b845a4.tar.gz qemu-4f4896db5fb2285df016ff927508560c89b845a4.tar.bz2 | |
qed: Handle failure for potentially large allocations
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 qed block driver.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
Diffstat (limited to 'block/qed.c')
| -rw-r--r-- | block/qed.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/block/qed.c b/block/qed.c index 7944832..ba395af 100644 --- a/block/qed.c +++ b/block/qed.c @@ -1240,7 +1240,11 @@ static void qed_aio_write_inplace(QEDAIOCB *acb, uint64_t offset, size_t len) struct iovec *iov = acb->qiov->iov; if (!iov->iov_base) { - iov->iov_base = qemu_blockalign(acb->common.bs, iov->iov_len); + iov->iov_base = qemu_try_blockalign(acb->common.bs, iov->iov_len); + if (iov->iov_base == NULL) { + qed_aio_complete(acb, -ENOMEM); + return; + } memset(iov->iov_base, 0, iov->iov_len); } } |