Patch "async_tx: use GFP_NOWAIT rather than GFP_IO" has been added to the 3.14-stable tree
From: <gregkh@linuxfoundation.org>
Date: 2016-03-01 08:16:13
This is a note to let you know that I've just added the patch titled
async_tx: use GFP_NOWAIT rather than GFP_IO
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
async_tx-use-gfp_nowait-rather-than-gfp_io.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let [off-list ref] know about it.
From b02bab6b0f928d49dbfb03e1e4e9dd43647623d7 Mon Sep 17 00:00:00 2001
From: NeilBrown <redacted>
Date: Thu, 7 Jan 2016 11:02:34 +1100
Subject: async_tx: use GFP_NOWAIT rather than GFP_IO
From: NeilBrown <redacted>
commit b02bab6b0f928d49dbfb03e1e4e9dd43647623d7 upstream.
These async_XX functions are called from md/raid5 in an atomic
section, between get_cpu() and put_cpu(), so they must not sleep.
So use GFP_NOWAIT rather than GFP_IO.
Dan Williams writes: Longer term async_tx needs to be merged into md
directly as we can allocate this unmap data statically per-stripe
rather than per request.
Fixed: 7476bd79fc01 ("async_pq: convert to dmaengine_unmap_data")
Reported-and-tested-by: Stanislav Samsonov <redacted>
Acked-by: Dan Williams <redacted>
Signed-off-by: NeilBrown <redacted>
Signed-off-by: Vinod Koul <redacted>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
crypto/async_tx/async_memcpy.c | 2 +-
crypto/async_tx/async_pq.c | 4 ++--
crypto/async_tx/async_raid6_recov.c | 4 ++--
crypto/async_tx/async_xor.c | 4 ++--
4 files changed, 7 insertions(+), 7 deletions(-)
--- a/crypto/async_tx/async_memcpy.c
+++ b/crypto/async_tx/async_memcpy.c@@ -53,7 +53,7 @@ async_memcpy(struct page *dest, struct p struct dmaengine_unmap_data *unmap = NULL; if (device) - unmap = dmaengine_get_unmap_data(device->dev, 2, GFP_NOIO); + unmap = dmaengine_get_unmap_data(device->dev, 2, GFP_NOWAIT); if (unmap && is_dma_copy_aligned(device, src_offset, dest_offset, len)) { unsigned long dma_prep_flags = 0; --- a/crypto/async_tx/async_pq.c +++ b/crypto/async_tx/async_pq.c
@@ -176,7 +176,7 @@ async_gen_syndrome(struct page **blocks, BUG_ON(disks > 255 || !(P(blocks, disks) || Q(blocks, disks))); if (device) - unmap = dmaengine_get_unmap_data(device->dev, disks, GFP_NOIO); + unmap = dmaengine_get_unmap_data(device->dev, disks, GFP_NOWAIT); if (unmap && (src_cnt <= dma_maxpq(device, 0) ||
@@ -294,7 +294,7 @@ async_syndrome_val(struct page **blocks, BUG_ON(disks < 4); if (device) - unmap = dmaengine_get_unmap_data(device->dev, disks, GFP_NOIO); + unmap = dmaengine_get_unmap_data(device->dev, disks, GFP_NOWAIT); if (unmap && disks <= dma_maxpq(device, 0) && is_dma_pq_aligned(device, offset, 0, len)) { --- a/crypto/async_tx/async_raid6_recov.c +++ b/crypto/async_tx/async_raid6_recov.c
@@ -41,7 +41,7 @@ async_sum_product(struct page *dest, str u8 *a, *b, *c; if (dma) - unmap = dmaengine_get_unmap_data(dma->dev, 3, GFP_NOIO); + unmap = dmaengine_get_unmap_data(dma->dev, 3, GFP_NOWAIT); if (unmap) { struct device *dev = dma->dev;
@@ -105,7 +105,7 @@ async_mult(struct page *dest, struct pag u8 *d, *s; if (dma) - unmap = dmaengine_get_unmap_data(dma->dev, 3, GFP_NOIO); + unmap = dmaengine_get_unmap_data(dma->dev, 3, GFP_NOWAIT); if (unmap) { dma_addr_t dma_dest[2]; --- a/crypto/async_tx/async_xor.c +++ b/crypto/async_tx/async_xor.c
@@ -182,7 +182,7 @@ async_xor(struct page *dest, struct page BUG_ON(src_cnt <= 1); if (device) - unmap = dmaengine_get_unmap_data(device->dev, src_cnt+1, GFP_NOIO); + unmap = dmaengine_get_unmap_data(device->dev, src_cnt+1, GFP_NOWAIT); if (unmap && is_dma_xor_aligned(device, offset, 0, len)) { struct dma_async_tx_descriptor *tx;
@@ -278,7 +278,7 @@ async_xor_val(struct page *dest, struct BUG_ON(src_cnt <= 1); if (device) - unmap = dmaengine_get_unmap_data(device->dev, src_cnt, GFP_NOIO); + unmap = dmaengine_get_unmap_data(device->dev, src_cnt, GFP_NOWAIT); if (unmap && src_cnt <= device->max_xor && is_dma_xor_aligned(device, offset, 0, len)) {
Patches currently in stable-queue which might be from neilb@suse.com are queue-3.14/async_tx-use-gfp_nowait-rather-than-gfp_io.patch