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for-linus-20180204

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Merge tag 'for-linus-20180204' of git://git.kernel.dk/linux-block

Pull more block updates from Jens Axboe:
 "Most of this is fixes and not new code/features:

   - skd fix from Arnd, fixing a build error dependent on sla allocator
     type.

   - blk-mq scheduler discard merging fixes, one from me and one from
     Keith. This fixes a segment miscalculation for blk-mq-sched, where
     we mistakenly think two segments are physically contigious even
     though the request isn't carrying real data. Also fixes a bio-to-rq
     merge case.

   - Don't re-set a bit on the buffer_head flags, if it's already set.
     This can cause scalability concerns on bigger machines and
     workloads. From Kemi Wang.

   - Add BLK_STS_DEV_RESOURCE return value to blk-mq, allowing us to
     distuingish between a local (device related) resource starvation
     and a global one. The latter might happen without IO being in
     flight, so it has to be handled a bit differently. From Ming"

* tag 'for-linus-20180204' of git://git.kernel.dk/linux-block:
  block: skd: fix incorrect linux/slab_def.h inclusion
  buffer: Avoid setting buffer bits that are already set
  blk-mq-sched: Enable merging discard bio into request
  blk-mq: fix discard merge with scheduler attached
  blk-mq: introduce BLK_STS_DEV_RESOURCE
This commit is contained in:
Linus Torvalds 2018-02-04 11:16:35 -08:00
commit 64b28683de
13 changed files with 83 additions and 30 deletions
Download patch file Download diff file Expand all files Collapse all files

2
drivers/block/null_blk.c
View file

@ -1230,7 +1230,7 @@ static blk_status_t null_handle_cmd(struct nullb_cmd *cmd)
return BLK_STS_OK;
} else
/* requeue request */
return BLK_STS_RESOURCE;
return BLK_STS_DEV_RESOURCE;
}
}

7
drivers/block/skd_main.c
View file

@ -32,7 +32,6 @@
#include <linux/aer.h>
#include <linux/wait.h>
#include <linux/stringify.h>
#include <linux/slab_def.h>
#include <scsi/scsi.h>
#include <scsi/sg.h>
#include <linux/io.h>
@ -2603,7 +2602,8 @@ static void *skd_alloc_dma(struct skd_device *skdev, struct kmem_cache *s,
buf = kmem_cache_alloc(s, gfp);
if (!buf)
return NULL;
*dma_handle = dma_map_single(dev, buf, s->size, dir);
*dma_handle = dma_map_single(dev, buf,
kmem_cache_size(s), dir);
if (dma_mapping_error(dev, *dma_handle)) {
kmem_cache_free(s, buf);
buf = NULL;
@ -2618,7 +2618,8 @@ static void skd_free_dma(struct skd_device *skdev, struct kmem_cache *s,
if (!vaddr)
return;
dma_unmap_single(&skdev->pdev->dev, dma_handle, s->size, dir);
dma_unmap_single(&skdev->pdev->dev, dma_handle,
kmem_cache_size(s), dir);
kmem_cache_free(s, vaddr);
}

2
drivers/block/virtio_blk.c
View file

@ -276,7 +276,7 @@ static blk_status_t virtio_queue_rq(struct blk_mq_hw_ctx *hctx,
/* Out of mem doesn't actually happen, since we fall back
* to direct descriptors */
if (err == -ENOMEM || err == -ENOSPC)
return BLK_STS_RESOURCE;
return BLK_STS_DEV_RESOURCE;
return BLK_STS_IOERR;
}

2
drivers/block/xen-blkfront.c
View file

@ -911,7 +911,7 @@ out_err:
out_busy:
blk_mq_stop_hw_queue(hctx);
spin_unlock_irqrestore(&rinfo->ring_lock, flags);
return BLK_STS_RESOURCE;
return BLK_STS_DEV_RESOURCE;
}
static void blkif_complete_rq(struct request *rq)