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ceph: don't freeze during write page faults

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Prevent freezing operations during write page faults. This is good
practice for most filesystems, but especially for ceph since we're
monkeying with the signal table here.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Jeff Layton 2019-08-01 10:06:40 -04:00 committed by Ilya Dryomov
parent c62498d7f9
commit 249c1df59a
1 changed files with 2 additions and 0 deletions
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2
fs/ceph/addr.c
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@ -1548,6 +1548,7 @@ static vm_fault_t ceph_page_mkwrite(struct vm_fault *vmf)
if (!prealloc_cf) if (!prealloc_cf)
return VM_FAULT_OOM; return VM_FAULT_OOM;
sb_start_pagefault(inode->i_sb);
ceph_block_sigs(&oldset); ceph_block_sigs(&oldset);
if (ci->i_inline_version != CEPH_INLINE_NONE) { if (ci->i_inline_version != CEPH_INLINE_NONE) {
@ -1622,6 +1623,7 @@ static vm_fault_t ceph_page_mkwrite(struct vm_fault *vmf)
ceph_put_cap_refs(ci, got); ceph_put_cap_refs(ci, got);
out_free: out_free:
ceph_restore_sigs(&oldset); ceph_restore_sigs(&oldset);
sb_end_pagefault(inode->i_sb);
ceph_free_cap_flush(prealloc_cf); ceph_free_cap_flush(prealloc_cf);
if (err < 0) if (err < 0)
ret = vmf_error(err); ret = vmf_error(err);