[pbs-devel] [pve-devel] [PATCH v2 pve-qemu 03/11] add alloc-track block driver patch
Wolfgang Bumiller
w.bumiller at proxmox.com
Mon Mar 15 15:14:57 CET 2021
series looks mostly fine, just a comment inline below...
On Wed, Mar 03, 2021 at 10:56:04AM +0100, Stefan Reiter wrote:
> See added patches for more info, overview:
> 0044: slightly increase PBS performance by reducing allocations
> 0045: slightly increase block-stream performance for Ceph
> 0046: don't crash with block-stream on RBD
> 0047: add alloc-track driver for live restore
>
> Signed-off-by: Stefan Reiter <s.reiter at proxmox.com>
> ---
>
> works best with updated proxmox-backup-qemu, but no hard dependency
>
> v2:
> * now sent as pve-qemu combined patch
> * 0060 is unchanged
> * 0061/0062 are new, they fix restore via user-space Ceph
> * 0063 (alloc-track) is updated with Wolfgangs feedback (track_co_block_status)
> and updated for 5.2 compatibility (mainly track_drop)
>
> ...st-path-reads-without-allocation-if-.patch | 52 +++
> ...PVE-block-stream-increase-chunk-size.patch | 23 ++
> ...accept-NULL-qiov-in-bdrv_pad_request.patch | 42 ++
> .../0047-block-add-alloc-track-driver.patch | 380 ++++++++++++++++++
> debian/patches/series | 4 +
> 5 files changed, 501 insertions(+)
> create mode 100644 debian/patches/pve/0044-PVE-block-pbs-fast-path-reads-without-allocation-if-.patch
> create mode 100644 debian/patches/pve/0045-PVE-block-stream-increase-chunk-size.patch
> create mode 100644 debian/patches/pve/0046-block-io-accept-NULL-qiov-in-bdrv_pad_request.patch
> create mode 100644 debian/patches/pve/0047-block-add-alloc-track-driver.patch
>
> diff --git a/debian/patches/pve/0044-PVE-block-pbs-fast-path-reads-without-allocation-if-.patch b/debian/patches/pve/0044-PVE-block-pbs-fast-path-reads-without-allocation-if-.patch
> new file mode 100644
> index 0000000..a85ebc2
> --- /dev/null
> +++ b/debian/patches/pve/0044-PVE-block-pbs-fast-path-reads-without-allocation-if-.patch
> @@ -0,0 +1,52 @@
> +From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
> +From: Stefan Reiter <s.reiter at proxmox.com>
> +Date: Wed, 9 Dec 2020 11:46:57 +0100
> +Subject: [PATCH] PVE: block/pbs: fast-path reads without allocation if
> + possible
> +
> +...and switch over to g_malloc/g_free while at it to align with other
> +QEMU code.
> +
> +Tracing shows the fast-path is taken almost all the time, though not
> +100% so the slow one is still necessary.
> +
> +Signed-off-by: Stefan Reiter <s.reiter at proxmox.com>
> +---
> + block/pbs.c | 17 ++++++++++++++---
> + 1 file changed, 14 insertions(+), 3 deletions(-)
> +
> +diff --git a/block/pbs.c b/block/pbs.c
> +index 1481a2bfd1..fbf0d8d845 100644
> +--- a/block/pbs.c
> ++++ b/block/pbs.c
> +@@ -200,7 +200,16 @@ static coroutine_fn int pbs_co_preadv(BlockDriverState *bs,
> + BDRVPBSState *s = bs->opaque;
> + int ret;
> + char *pbs_error = NULL;
> +- uint8_t *buf = malloc(bytes);
> ++ uint8_t *buf;
> ++ bool inline_buf = true;
> ++
> ++ /* for single-buffer IO vectors we can fast-path the write directly to it */
> ++ if (qiov->niov == 1 && qiov->iov->iov_len >= bytes) {
> ++ buf = qiov->iov->iov_base;
> ++ } else {
> ++ inline_buf = false;
> ++ buf = g_malloc(bytes);
> ++ }
> +
> + ReadCallbackData rcb = {
> + .co = qemu_coroutine_self(),
> +@@ -218,8 +227,10 @@ static coroutine_fn int pbs_co_preadv(BlockDriverState *bs,
> + return -EIO;
> + }
> +
> +- qemu_iovec_from_buf(qiov, 0, buf, bytes);
> +- free(buf);
> ++ if (!inline_buf) {
> ++ qemu_iovec_from_buf(qiov, 0, buf, bytes);
> ++ g_free(buf);
> ++ }
> +
> + return ret;
> + }
> diff --git a/debian/patches/pve/0045-PVE-block-stream-increase-chunk-size.patch b/debian/patches/pve/0045-PVE-block-stream-increase-chunk-size.patch
> new file mode 100644
> index 0000000..601f8c7
> --- /dev/null
> +++ b/debian/patches/pve/0045-PVE-block-stream-increase-chunk-size.patch
> @@ -0,0 +1,23 @@
> +From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
> +From: Stefan Reiter <s.reiter at proxmox.com>
> +Date: Tue, 2 Mar 2021 16:34:28 +0100
> +Subject: [PATCH] PVE: block/stream: increase chunk size
> +
> +Ceph favors bigger chunks, so increase to 4M.
> +---
> + block/stream.c | 2 +-
> + 1 file changed, 1 insertion(+), 1 deletion(-)
> +
> +diff --git a/block/stream.c b/block/stream.c
> +index 236384f2f7..a5371420e3 100644
> +--- a/block/stream.c
> ++++ b/block/stream.c
> +@@ -26,7 +26,7 @@ enum {
> + * large enough to process multiple clusters in a single call, so
> + * that populating contiguous regions of the image is efficient.
> + */
> +- STREAM_CHUNK = 512 * 1024, /* in bytes */
> ++ STREAM_CHUNK = 4 * 1024 * 1024, /* in bytes */
> + };
> +
> + typedef struct StreamBlockJob {
> diff --git a/debian/patches/pve/0046-block-io-accept-NULL-qiov-in-bdrv_pad_request.patch b/debian/patches/pve/0046-block-io-accept-NULL-qiov-in-bdrv_pad_request.patch
> new file mode 100644
> index 0000000..e40fa2e
> --- /dev/null
> +++ b/debian/patches/pve/0046-block-io-accept-NULL-qiov-in-bdrv_pad_request.patch
> @@ -0,0 +1,42 @@
> +From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
> +From: Stefan Reiter <s.reiter at proxmox.com>
> +Date: Tue, 2 Mar 2021 16:11:54 +0100
> +Subject: [PATCH] block/io: accept NULL qiov in bdrv_pad_request
> +
> +Some operations, e.g. block-stream, perform reads while discarding the
> +results (only copy-on-read matters). In this case they will pass NULL as
> +the target QEMUIOVector, which will however trip bdrv_pad_request, since
> +it wants to extend its passed vector.
> +
> +Simply check for NULL and do nothing, there's no reason to pad the
> +target if it will be discarded anyway.
> +---
> + block/io.c | 13 ++++++++-----
> + 1 file changed, 8 insertions(+), 5 deletions(-)
> +
> +diff --git a/block/io.c b/block/io.c
> +index ec5e152bb7..08dee005ec 100644
> +--- a/block/io.c
> ++++ b/block/io.c
> +@@ -1613,13 +1613,16 @@ static bool bdrv_pad_request(BlockDriverState *bs,
> + return false;
> + }
> +
> +- qemu_iovec_init_extended(&pad->local_qiov, pad->buf, pad->head,
> +- *qiov, *qiov_offset, *bytes,
> +- pad->buf + pad->buf_len - pad->tail, pad->tail);
> ++ if (*qiov) {
> ++ qemu_iovec_init_extended(&pad->local_qiov, pad->buf, pad->head,
> ++ *qiov, *qiov_offset, *bytes,
> ++ pad->buf + pad->buf_len - pad->tail, pad->tail);
> ++ *qiov = &pad->local_qiov;
> ++ *qiov_offset = 0;
> ++ }
> ++
> + *bytes += pad->head + pad->tail;
> + *offset -= pad->head;
> +- *qiov = &pad->local_qiov;
> +- *qiov_offset = 0;
> +
> + return true;
> + }
> diff --git a/debian/patches/pve/0047-block-add-alloc-track-driver.patch b/debian/patches/pve/0047-block-add-alloc-track-driver.patch
> new file mode 100644
> index 0000000..6aaa186
> --- /dev/null
> +++ b/debian/patches/pve/0047-block-add-alloc-track-driver.patch
> @@ -0,0 +1,380 @@
> +From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
> +From: Stefan Reiter <s.reiter at proxmox.com>
> +Date: Mon, 7 Dec 2020 15:21:03 +0100
> +Subject: [PATCH] block: add alloc-track driver
> +
> +Add a new filter node 'alloc-track', which seperates reads and writes to
> +different children, thus allowing to put a backing image behind any
> +blockdev (regardless of driver support). Since we can't detect any
> +pre-allocated blocks, we can only track new writes, hence the write
> +target ('file') for this node must always be empty.
> +
> +Intended use case is for live restoring, i.e. add a backup image as a
> +block device into a VM, then put an alloc-track on the restore target
> +and set the backup as backing. With this, one can use a regular
> +'block-stream' to restore the image, while the VM can already run in the
> +background. Copy-on-read will help make progress as the VM reads as
> +well.
> +
> +This only worked if the target supports backing images, so up until now
> +only for qcow2, with alloc-track any driver for the target can be used.
> +
> +If 'auto-remove' is set, alloc-track will automatically detach itself
> +once the backing image is removed. It will be replaced by 'file'.
> +
> +Signed-off-by: Stefan Reiter <s.reiter at proxmox.com>
> +---
> + block/alloc-track.c | 331 ++++++++++++++++++++++++++++++++++++++++++++
> + block/meson.build | 1 +
> + 2 files changed, 332 insertions(+)
> + create mode 100644 block/alloc-track.c
> +
> +diff --git a/block/alloc-track.c b/block/alloc-track.c
> +new file mode 100644
> +index 0000000000..cc06cfca13
> +--- /dev/null
> ++++ b/block/alloc-track.c
> +@@ -0,0 +1,331 @@
> ++/*
> ++ * Node to allow backing images to be applied to any node. Assumes a blank
> ++ * image to begin with, only new writes are tracked as allocated, thus this
> ++ * must never be put on a node that already contains data.
> ++ *
> ++ * Copyright (c) 2020 Proxmox Server Solutions GmbH
> ++ * Copyright (c) 2020 Stefan Reiter <s.reiter at proxmox.com>
> ++ *
> ++ * This work is licensed under the terms of the GNU GPL, version 2 or later.
> ++ * See the COPYING file in the top-level directory.
> ++ */
> ++
> ++#include "qemu/osdep.h"
> ++#include "qapi/error.h"
> ++#include "block/block_int.h"
> ++#include "qapi/qmp/qdict.h"
> ++#include "qapi/qmp/qstring.h"
> ++#include "qemu/cutils.h"
> ++#include "qemu/option.h"
> ++#include "qemu/module.h"
> ++#include "sysemu/block-backend.h"
> ++
> ++#define TRACK_OPT_AUTO_REMOVE "auto-remove"
> ++
> ++typedef struct {
> ++ BdrvDirtyBitmap *bitmap;
> ++ bool dropping;
> ++ bool auto_remove;
> ++} BDRVAllocTrackState;
> ++
> ++static QemuOptsList runtime_opts = {
> ++ .name = "alloc-track",
> ++ .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
> ++ .desc = {
> ++ {
> ++ .name = TRACK_OPT_AUTO_REMOVE,
> ++ .type = QEMU_OPT_BOOL,
> ++ .help = "automatically replace this node with 'file' when 'backing'"
> ++ "is detached",
> ++ },
> ++ { /* end of list */ }
> ++ },
> ++};
> ++
> ++static void track_refresh_limits(BlockDriverState *bs, Error **errp)
> ++{
> ++ BlockDriverInfo bdi;
> ++
> ++ if (!bs->file) {
> ++ return;
> ++ }
> ++
> ++ /* always use alignment from underlying write device so RMW cycle for
> ++ * bdrv_pwritev reads data from our backing via track_co_preadv (no partial
> ++ * cluster allocation in 'file') */
> ++ bdrv_get_info(bs->file->bs, &bdi);
> ++ bs->bl.request_alignment = MAX(bs->file->bs->bl.request_alignment,
> ++ MAX(bdi.cluster_size, BDRV_SECTOR_SIZE));
> ++}
> ++
> ++static int track_open(BlockDriverState *bs, QDict *options, int flags,
> ++ Error **errp)
> ++{
> ++ BDRVAllocTrackState *s = bs->opaque;
> ++ QemuOpts *opts;
> ++ Error *local_err = NULL;
> ++ int ret = 0;
> ++
> ++ opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
> ++ qemu_opts_absorb_qdict(opts, options, &local_err);
> ++ if (local_err) {
> ++ error_propagate(errp, local_err);
> ++ ret = -EINVAL;
> ++ goto fail;
> ++ }
> ++
> ++ s->auto_remove = qemu_opt_get_bool(opts, TRACK_OPT_AUTO_REMOVE, false);
> ++
> ++ /* open the target (write) node, backing will be attached by block layer */
> ++ bs->file = bdrv_open_child(NULL, options, "file", bs, &child_of_bds,
> ++ BDRV_CHILD_DATA | BDRV_CHILD_METADATA, false,
> ++ &local_err);
> ++ if (local_err) {
> ++ ret = -EINVAL;
> ++ error_propagate(errp, local_err);
> ++ goto fail;
> ++ }
> ++
> ++ track_refresh_limits(bs, errp);
> ++ uint64_t gran = bs->bl.request_alignment;
> ++ s->bitmap = bdrv_create_dirty_bitmap(bs->file->bs, gran, NULL, &local_err);
> ++ if (local_err) {
> ++ ret = -EIO;
> ++ error_propagate(errp, local_err);
> ++ goto fail;
> ++ }
> ++
> ++ s->dropping = false;
> ++
> ++fail:
> ++ if (ret < 0) {
> ++ bdrv_unref_child(bs, bs->file);
> ++ if (s->bitmap) {
> ++ bdrv_release_dirty_bitmap(s->bitmap);
> ++ }
> ++ }
> ++ qemu_opts_del(opts);
> ++ return ret;
> ++}
> ++
> ++static void track_close(BlockDriverState *bs)
> ++{
> ++ BDRVAllocTrackState *s = bs->opaque;
> ++ if (s->bitmap) {
> ++ bdrv_release_dirty_bitmap(s->bitmap);
> ++ }
> ++}
> ++
> ++static int64_t track_getlength(BlockDriverState *bs)
> ++{
> ++ return bdrv_getlength(bs->file->bs);
> ++}
> ++
> ++static int coroutine_fn track_co_preadv(BlockDriverState *bs,
> ++ uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags)
> ++{
> ++ BDRVAllocTrackState *s = bs->opaque;
> ++ QEMUIOVector local_qiov;
> ++ int ret;
> ++
> ++ /* 'cur_offset' is relative to 'offset', 'local_offset' to image start */
> ++ uint64_t cur_offset, local_offset;
> ++ int64_t local_bytes;
> ++ bool alloc;
> ++
> ++ /* a read request can span multiple granularity-sized chunks, and can thus
> ++ * contain blocks with different allocation status - we could just iterate
> ++ * granularity-wise, but for better performance use bdrv_dirty_bitmap_next_X
> ++ * to find the next flip and consider everything up to that in one go */
> ++ for (cur_offset = 0; cur_offset < bytes; cur_offset += local_bytes) {
> ++ local_offset = offset + cur_offset;
> ++ alloc = bdrv_dirty_bitmap_get(s->bitmap, local_offset);
> ++ if (alloc) {
> ++ local_bytes = bdrv_dirty_bitmap_next_zero(s->bitmap, local_offset,
> ++ bytes - cur_offset);
> ++ } else {
> ++ local_bytes = bdrv_dirty_bitmap_next_dirty(s->bitmap, local_offset,
> ++ bytes - cur_offset);
> ++ }
> ++
> ++ /* _bitmap_next_X return is -1 if no end found within limit, otherwise
> ++ * offset of next flip (to start of image) */
> ++ local_bytes = local_bytes < 0 ?
> ++ bytes - cur_offset :
> ++ local_bytes - local_offset;
> ++
> ++ qemu_iovec_init_slice(&local_qiov, qiov, cur_offset, local_bytes);
> ++
> ++ if (alloc) {
> ++ ret = bdrv_co_preadv(bs->file, local_offset, local_bytes,
> ++ &local_qiov, flags);
> ++ } else if (bs->backing) {
> ++ ret = bdrv_co_preadv(bs->backing, local_offset, local_bytes,
> ++ &local_qiov, flags);
> ++ } else {
> ++ ret = qemu_iovec_memset(&local_qiov, cur_offset, 0, local_bytes);
> ++ }
> ++
> ++ if (ret != 0) {
> ++ break;
> ++ }
> ++ }
> ++
> ++ return ret;
> ++}
> ++
> ++static int coroutine_fn track_co_pwritev(BlockDriverState *bs,
> ++ uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags)
> ++{
> ++ return bdrv_co_pwritev(bs->file, offset, bytes, qiov, flags);
> ++}
> ++
> ++static int coroutine_fn track_co_pwrite_zeroes(BlockDriverState *bs,
> ++ int64_t offset, int count, BdrvRequestFlags flags)
> ++{
> ++ return bdrv_pwrite_zeroes(bs->file, offset, count, flags);
> ++}
> ++
> ++static int coroutine_fn track_co_pdiscard(BlockDriverState *bs,
> ++ int64_t offset, int count)
> ++{
> ++ return bdrv_co_pdiscard(bs->file, offset, count);
> ++}
> ++
> ++static coroutine_fn int track_co_flush(BlockDriverState *bs)
> ++{
> ++ return bdrv_co_flush(bs->file->bs);
> ++}
> ++
> ++static int coroutine_fn track_co_block_status(BlockDriverState *bs,
> ++ bool want_zero,
> ++ int64_t offset,
> ++ int64_t bytes,
> ++ int64_t *pnum,
> ++ int64_t *map,
> ++ BlockDriverState **file)
> ++{
> ++ BDRVAllocTrackState *s = bs->opaque;
> ++
> ++ bool alloc = bdrv_dirty_bitmap_get(s->bitmap, offset);
> ++ int64_t next_flipped;
> ++ if (alloc) {
> ++ next_flipped = bdrv_dirty_bitmap_next_zero(s->bitmap, offset, bytes);
> ++ } else {
> ++ next_flipped = bdrv_dirty_bitmap_next_dirty(s->bitmap, offset, bytes);
> ++ }
> ++
> ++ /* in case not the entire region has the same state, we need to set pnum to
> ++ * indicate for how many bytes our result is valid */
> ++ *pnum = next_flipped == -1 ? bytes : next_flipped - offset;
> ++ *map = offset;
> ++
> ++ if (alloc) {
> ++ *file = bs->file->bs;
> ++ return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID;
> ++ } else if (bs->backing) {
> ++ *file = bs->backing->bs;
> ++ }
> ++ return 0;
> ++}
> ++
> ++static void track_child_perm(BlockDriverState *bs, BdrvChild *c,
> ++ BdrvChildRole role, BlockReopenQueue *reopen_queue,
> ++ uint64_t perm, uint64_t shared,
> ++ uint64_t *nperm, uint64_t *nshared)
> ++{
> ++ BDRVAllocTrackState *s = bs->opaque;
> ++
> ++ *nshared = BLK_PERM_ALL;
> ++
> ++ /* in case we're currently dropping ourselves, claim to not use any
> ++ * permissions at all - which is fine, since from this point on we will
> ++ * never issue a read or write anymore */
> ++ if (s->dropping) {
> ++ *nperm = 0;
> ++ return;
> ++ }
> ++
> ++ if (role & BDRV_CHILD_DATA) {
> ++ *nperm = perm & DEFAULT_PERM_PASSTHROUGH;
> ++ } else {
> ++ /* 'backing' is also a child of our BDS, but we don't expect it to be
> ++ * writeable, so we only forward 'consistent read' */
> ++ *nperm = perm & BLK_PERM_CONSISTENT_READ;
> ++ }
> ++}
> ++
> ++static void track_drop(void *opaque)
> ++{
> ++ BlockDriverState *bs = (BlockDriverState*)opaque;
> ++ BlockDriverState *file = bs->file->bs;
> ++ BDRVAllocTrackState *s = bs->opaque;
> ++
> ++ assert(file);
> ++
> ++ /* we rely on the fact that we're not used anywhere else, so let's wait
> ++ * until we have the only reference to ourselves */
> ++ if (bs->refcnt > 1) {
> ++ aio_bh_schedule_oneshot(qemu_get_aio_context(), track_drop, opaque);
I'm not very happy with this, but I'm not deep enough in the whole
bdrv/drain/BH/aio context logic to figure out a better way right now.
However... (see below)
> ++ return;
> ++ }
> ++
> ++ /* we do not need a bdrv_drained_end, since this is applied only to the node
> ++ * which gets removed by bdrv_replace_node */
> ++ bdrv_drained_begin(bs);
> ++
> ++ /* now that we're drained, we can safely set 'dropping' */
> ++ s->dropping = true;
> ++ bdrv_child_refresh_perms(bs, bs->file, &error_abort);
> ++
> ++ /* this will bdrv_unref() and thus drop us */
> ++ bdrv_replace_node(bs, file, &error_abort);
> ++}
> ++
> ++static int track_change_backing_file(BlockDriverState *bs,
> ++ const char *backing_file,
> ++ const char *backing_fmt)
> ++{
> ++ BDRVAllocTrackState *s = bs->opaque;
> ++ if (s->auto_remove && backing_file == NULL && backing_fmt == NULL) {
...I'd like to at least make sure that this is only triggered once here,
so either reuse (and already set) `s->dropping` here, or add another
boolean for this?
Also, perhaps we should give the drop callback a hard reference
(bdrv_ref(bs) and bump the count check inside track_drop), just to make
sure we don't end up crashing in the `drop` handler when we
simultaneously try to hot-unplug the disk from the VM.
> ++ /* backing file has been disconnected, there's no longer any use for
> ++ * this node, so let's remove ourselves from the block graph - we need
> ++ * to schedule this for later however, since when this function is
> ++ * called, the blockjob modifying us is probably not done yet and has a
> ++ * blocker on 'bs' */
> ++ aio_bh_schedule_oneshot(qemu_get_aio_context(), track_drop, (void*)bs);
> ++ }
> ++
> ++ return 0;
> ++}
> ++
> ++static BlockDriver bdrv_alloc_track = {
> ++ .format_name = "alloc-track",
> ++ .instance_size = sizeof(BDRVAllocTrackState),
> ++
> ++ .bdrv_file_open = track_open,
> ++ .bdrv_close = track_close,
> ++ .bdrv_getlength = track_getlength,
> ++ .bdrv_child_perm = track_child_perm,
> ++ .bdrv_refresh_limits = track_refresh_limits,
> ++
> ++ .bdrv_co_pwrite_zeroes = track_co_pwrite_zeroes,
> ++ .bdrv_co_pwritev = track_co_pwritev,
> ++ .bdrv_co_preadv = track_co_preadv,
> ++ .bdrv_co_pdiscard = track_co_pdiscard,
> ++
> ++ .bdrv_co_flush = track_co_flush,
> ++ .bdrv_co_flush_to_disk = track_co_flush,
> ++
> ++ .supports_backing = true,
> ++
> ++ .bdrv_co_block_status = track_co_block_status,
> ++ .bdrv_change_backing_file = track_change_backing_file,
> ++};
> ++
> ++static void bdrv_alloc_track_init(void)
> ++{
> ++ bdrv_register(&bdrv_alloc_track);
> ++}
> ++
> ++block_init(bdrv_alloc_track_init);
> +diff --git a/block/meson.build b/block/meson.build
> +index a070060e53..e387990764 100644
> +--- a/block/meson.build
> ++++ b/block/meson.build
> +@@ -2,6 +2,7 @@ block_ss.add(genh)
> + block_ss.add(files(
> + 'accounting.c',
> + 'aio_task.c',
> ++ 'alloc-track.c',
> + 'amend.c',
> + 'backup.c',
> + 'backup-dump.c',
> diff --git a/debian/patches/series b/debian/patches/series
> index 1b30d97..f6de587 100644
> --- a/debian/patches/series
> +++ b/debian/patches/series
> @@ -55,3 +55,7 @@ pve/0040-migration-block-dirty-bitmap-migrate-other-bitmaps-e.patch
> pve/0041-PVE-fall-back-to-open-iscsi-initiatorname.patch
> pve/0042-PVE-Use-coroutine-QMP-for-backup-cancel_backup.patch
> pve/0043-PBS-add-master-key-support.patch
> +pve/0044-PVE-block-pbs-fast-path-reads-without-allocation-if-.patch
> +pve/0045-PVE-block-stream-increase-chunk-size.patch
> +pve/0046-block-io-accept-NULL-qiov-in-bdrv_pad_request.patch
> +pve/0047-block-add-alloc-track-driver.patch
> --
> 2.20.1
More information about the pbs-devel
mailing list