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Reintroduce uio_prefaultpages()

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This was accidentally removed by overzealous commenting.

Signed-off-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #1775
This commit is contained in:
Richard Yao 2013-09-02 00:22:30 -04:00 committed by Brian Behlendorf
parent 023699cd62
commit 9cac042cfe
1 changed files with 2 additions and 2 deletions
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4
module/zfs/zfs_vnops.c
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@ -650,18 +650,18 @@ zfs_write(struct inode *ip, uio_t *uio, int ioflag, cred_t *cr)
return (EAGAIN);
}
#ifdef HAVE_UIO_ZEROCOPY
/*
* Pre-fault the pages to ensure slow (eg NFS) pages
* don't hold up txg.
* Skip this if uio contains loaned arc_buf.
*/
#ifdef HAVE_UIO_ZEROCOPY
if ((uio->uio_extflg == UIO_XUIO) &&
(((xuio_t *)uio)->xu_type == UIOTYPE_ZEROCOPY))
xuio = (xuio_t *)uio;
else
#endif
uio_prefaultpages(MIN(n, max_blksz), uio);
#endif /* HAVE_UIO_ZEROCOPY */
/*
* If in append mode, set the io offset pointer to eof.