[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PULL 09/20] block/io: allow 64bit write-zeroes requests
From: |
Eric Blake |
Subject: |
[PULL 09/20] block/io: allow 64bit write-zeroes requests |
Date: |
Mon, 27 Sep 2021 16:55:34 -0500 |
From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Now that all drivers are updated by previous commit, we can drop two
last limiters on write-zeroes path: INT_MAX in
bdrv_co_do_pwrite_zeroes() and bdrv_check_request32() in
bdrv_co_pwritev_part().
Now everything is prepared for implementing incredibly cool and fast
big-write-zeroes in NBD and qcow2. And any other driver which wants it
of course.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20210903102807.27127-9-vsementsov@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
---
block/io.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/block/io.c b/block/io.c
index 0090224603f5..e40462742ea1 100644
--- a/block/io.c
+++ b/block/io.c
@@ -1869,7 +1869,8 @@ static int coroutine_fn
bdrv_co_do_pwrite_zeroes(BlockDriverState *bs,
int head = 0;
int tail = 0;
- int64_t max_write_zeroes = MIN_NON_ZERO(bs->bl.max_pwrite_zeroes, INT_MAX);
+ int64_t max_write_zeroes = MIN_NON_ZERO(bs->bl.max_pwrite_zeroes,
+ INT64_MAX);
int alignment = MAX(bs->bl.pwrite_zeroes_alignment,
bs->bl.request_alignment);
int max_transfer = MIN_NON_ZERO(bs->bl.max_transfer, MAX_BOUNCE_BUFFER);
@@ -2248,7 +2249,11 @@ int coroutine_fn bdrv_co_pwritev_part(BdrvChild *child,
return -ENOMEDIUM;
}
- ret = bdrv_check_request32(offset, bytes, qiov, qiov_offset);
+ if (flags & BDRV_REQ_ZERO_WRITE) {
+ ret = bdrv_check_qiov_request(offset, bytes, qiov, qiov_offset, NULL);
+ } else {
+ ret = bdrv_check_request32(offset, bytes, qiov, qiov_offset);
+ }
if (ret < 0) {
return ret;
}
--
2.31.1
[Prev in Thread] |
Current Thread |
[Next in Thread] |
- [PULL 09/20] block/io: allow 64bit write-zeroes requests,
Eric Blake <=