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SUSE:SLE-12-SP4:Update
qemu.15024
0157-qcow2-Resize-the-cache-upon-image-r.patch
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File 0157-qcow2-Resize-the-cache-upon-image-r.patch of Package qemu.15024
From fcacf4c71fbc92defecc46feb66fc8ed73306b4b Mon Sep 17 00:00:00 2001 From: Leonid Bloch <lbloch@janustech.com> Date: Wed, 26 Sep 2018 19:04:45 +0300 Subject: [PATCH] qcow2: Resize the cache upon image resizing The caches are now recalculated upon image resizing. This is done because the new default behavior of assigning L2 cache relatively to the image size, implies that the cache will be adapted accordingly after an image resize. Signed-off-by: Leonid Bloch <lbloch@janustech.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> (cherry picked from commit 45b4949c7bcdcd998cb42f5c517e80a2657cfd33) [LM: BSC#1139926] Signed-off-by: Lin Ma <lma@suse.com> --- block/qcow2.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/block/qcow2.c b/block/qcow2.c index 735d7945d5..2f23cd1283 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -3112,6 +3112,7 @@ static int qcow2_truncate(BlockDriverState *bs, int64_t offset, uint64_t old_length; int64_t new_l1_size; int ret; + QDict *options; if (prealloc != PREALLOC_MODE_OFF && prealloc != PREALLOC_MODE_METADATA && prealloc != PREALLOC_MODE_FALLOC && prealloc != PREALLOC_MODE_FULL) @@ -3326,6 +3327,8 @@ static int qcow2_truncate(BlockDriverState *bs, int64_t offset, } } + bs->total_sectors = offset / BDRV_SECTOR_SIZE; + /* write updated header.size */ offset = cpu_to_be64(offset); ret = bdrv_pwrite_sync(bs->file, offsetof(QCowHeader, size), @@ -3336,6 +3339,15 @@ static int qcow2_truncate(BlockDriverState *bs, int64_t offset, } s->l1_vm_state_index = new_l1_size; + + /* Update cache sizes */ + options = qdict_clone_shallow(bs->options); + ret = qcow2_update_options(bs, options, s->flags, errp); + QDECREF(options); + if (ret < 0) { + error_setg_errno(errp, -ret, "Failed to update the cache size"); + return ret; + } return 0; }
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