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bcachefs: Wrap vmap() in memalloc_nofs_save()/restore()
vmalloc() and vmap() don't take GFP_NOFS - this should be pushed further up the IO path, but for now just doing the simple fix. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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1 changed files with 5 additions and 1 deletions
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@ -7,6 +7,7 @@
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#include "super-io.h"
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#include <linux/lz4.h>
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#include <linux/sched/mm.h>
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#include <linux/zlib.h>
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#include <linux/zstd.h>
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@ -63,7 +64,7 @@ static struct bbuf __bio_map_or_bounce(struct bch_fs *c, struct bio *bio,
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struct bbuf ret;
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struct bio_vec bv;
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struct bvec_iter iter;
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unsigned nr_pages = 0;
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unsigned nr_pages = 0, flags;
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struct page *stack_pages[16];
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struct page **pages = NULL;
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void *data;
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@ -103,7 +104,10 @@ static struct bbuf __bio_map_or_bounce(struct bch_fs *c, struct bio *bio,
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__bio_for_each_segment(bv, bio, iter, start)
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pages[nr_pages++] = bv.bv_page;
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flags = memalloc_nofs_save();
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data = vmap(pages, nr_pages, VM_MAP, PAGE_KERNEL);
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memalloc_nofs_restore(flags);
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if (pages != stack_pages)
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kfree(pages);
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