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| author | kib <kib@FreeBSD.org> | 2013-08-30 20:12:23 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2013-08-30 20:12:23 +0000 |
| commit | 36259bf9a23d3108e0dea9e6ed15c10d82e62497 (patch) | |
| tree | 9db21cb765eb0b956c6a42198ad7544694625c46 /sys/dev/md/md.c | |
| parent | 6eb9415a25cd4946b587bff62cbb3a07a7c4a604 (diff) | |
| download | FreeBSD-src-36259bf9a23d3108e0dea9e6ed15c10d82e62497.zip FreeBSD-src-36259bf9a23d3108e0dea9e6ed15c10d82e62497.tar.gz | |
Give the page allocations initiated by the swap-backed md(4) a higher
priority. If the write is requested by a system daemon, sleeping
there would starve resources and cause deadlock.
Reported and tested by: pho
Sponsored by: The FreeBSD Foundation
Diffstat (limited to 'sys/dev/md/md.c')
| -rw-r--r-- | sys/dev/md/md.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/dev/md/md.c b/sys/dev/md/md.c index cad9765..f0d1aec 100644 --- a/sys/dev/md/md.c +++ b/sys/dev/md/md.c @@ -826,7 +826,7 @@ mdstart_swap(struct md_s *sc, struct bio *bp) vm_object_pip_add(sc->object, 1); for (i = bp->bio_offset / PAGE_SIZE; i <= lastp; i++) { len = ((i == lastp) ? lastend : PAGE_SIZE) - offs; - m = vm_page_grab(sc->object, i, VM_ALLOC_NORMAL); + m = vm_page_grab(sc->object, i, VM_ALLOC_SYSTEM); if (bp->bio_cmd == BIO_READ) { if (m->valid == VM_PAGE_BITS_ALL) rv = VM_PAGER_OK; |
