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splice: use mapping_gfp_mask 

The loop block driver is careful to mask __GFP_IO|__GFP_FS out of its
mapping_gfp_mask, to avoid hangs under memory pressure.  But nowadays
it uses splice, usually going through __generic_file_splice_read.  That
must use mapping_gfp_mask instead of GFP_KERNEL to avoid those hangs.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
Hugh Dickins 2008-04-03 23:35:22 +01:00 committed by Linus Torvalds
parent 9597362d35
commit 4cd1350465
1 changed files with 1 additions and 1 deletions
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2
fs/splice.c
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@ -320,7 +320,7 @@ __generic_file_splice_read(struct file *in, loff_t *ppos,
break;
error = add_to_page_cache_lru(page, mapping, index,
GFP_KERNEL);
mapping_gfp_mask(mapping));
if (unlikely(error)) {
page_cache_release(page);
if (error == -EEXIST)