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mm, page_alloc: rename __GFP_WAIT to __GFP_RECLAIM

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__GFP_WAIT was used to signal that the caller was in atomic context and
could not sleep.  Now it is possible to distinguish between true atomic
context and callers that are not willing to sleep.  The latter should
clear __GFP_DIRECT_RECLAIM so kswapd will still wake.  As clearing
__GFP_WAIT behaves differently, there is a risk that people will clear the
wrong flags.  This patch renames __GFP_WAIT to __GFP_RECLAIM to clearly
indicate what it does -- setting it allows all reclaim activity, clearing
them prevents it.

[akpm@linux-foundation.org: fix build]
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Christoph Lameter <cl@linux.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Vitaly Wool <vitalywool@gmail.com>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mel Gorman
2015-11-06 16:28:28 -08:00
committed by Linus Torvalds
parent 4011337083
commit 71baba4b92
38 changed files with 71 additions and 68 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/block/drbd/drbd_bitmap.c
+1 -1
View File
@@ -1007,7 +1007,7 @@ static void bm_page_io_async(struct drbd_bm_aio_ctx *ctx, int page_nr) __must_ho
bm_set_page_unchanged(b->bm_pages[page_nr]);
if (ctx->flags & BM_AIO_COPY_PAGES) {
page = mempool_alloc(drbd_md_io_page_pool, __GFP_HIGHMEM|__GFP_WAIT);
page = mempool_alloc(drbd_md_io_page_pool, __GFP_HIGHMEM|__GFP_RECLAIM);
copy_highpage(page, b->bm_pages[page_nr]);
bm_store_page_idx(page, page_nr);
} else
drivers/block/mtip32xx/mtip32xx.c
+1 -1
View File
@@ -173,7 +173,7 @@ static struct mtip_cmd *mtip_get_int_command(struct driver_data *dd)
{
struct request *rq;
rq = blk_mq_alloc_request(dd->queue, 0, __GFP_WAIT, true);
rq = blk_mq_alloc_request(dd->queue, 0, __GFP_RECLAIM, true);
return blk_mq_rq_to_pdu(rq);
}
drivers/block/paride/pd.c
+1 -1
View File
@@ -723,7 +723,7 @@ static int pd_special_command(struct pd_unit *disk,
struct request *rq;
int err = 0;
rq = blk_get_request(disk->gd->queue, READ, __GFP_WAIT);
rq = blk_get_request(disk->gd->queue, READ, __GFP_RECLAIM);
if (IS_ERR(rq))
return PTR_ERR(rq);
drivers/block/pktcdvd.c
+2 -2
View File
@@ -704,14 +704,14 @@ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *
int ret = 0;
rq = blk_get_request(q, (cgc->data_direction == CGC_DATA_WRITE) ?
WRITE : READ, __GFP_WAIT);
WRITE : READ, __GFP_RECLAIM);
if (IS_ERR(rq))
return PTR_ERR(rq);
blk_rq_set_block_pc(rq);
if (cgc->buflen) {
ret = blk_rq_map_kern(q, rq, cgc->buffer, cgc->buflen,
__GFP_WAIT);
__GFP_RECLAIM);
if (ret)
goto out;
}