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NFS nfs_vm_page_mkwrite: Don't freeze me, Bro...

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Prevent filesystem freezes while handling the write page fault.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust
2016-06-23 11:09:04 -04:00
parent e95fc4a069
commit 9a773e7c8d
1 changed files with 3 additions and 0 deletions
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3
fs/nfs/file.c
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@ -569,6 +569,8 @@ static int nfs_vm_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
filp, filp->f_mapping->host->i_ino, filp, filp->f_mapping->host->i_ino,
(long long)page_offset(page)); (long long)page_offset(page));
sb_start_pagefault(inode->i_sb);
/* make sure the cache has finished storing the page */ /* make sure the cache has finished storing the page */
nfs_fscache_wait_on_page_write(NFS_I(inode), page); nfs_fscache_wait_on_page_write(NFS_I(inode), page);
@ -595,6 +597,7 @@ static int nfs_vm_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
out_unlock: out_unlock:
unlock_page(page); unlock_page(page);
out: out:
sb_end_pagefault(inode->i_sb);
return ret; return ret;
} }