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Remove the nm_mtx mutex locking from the test for

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nm_maxfilesize. This value rarely, if ever, changes
and the nm_mtx mutex is locked/unlocked earlier in
the function, which should be sufficient to avoid
getting a stale cached value for it. There is a
discussion w.r.t. what these tests should be, but
I've left them basically the same as the regular
NFS client for now.

Suggested by:	pjd
MFC after:	2 weeks
This commit is contained in:
rmacklem 2011-04-21 19:56:06 +00:00
parent a6d81a941f
commit 02541adb4e
1 changed files with 1 additions and 5 deletions
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6
sys/fs/nfsclient/nfs_clbio.c
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@ -946,12 +946,8 @@ flush_and_restart:
if (uio->uio_offset < 0)
return (EINVAL);
tmp_off = uio->uio_offset + uio->uio_resid;
mtx_lock(&nmp->nm_mtx);
if (tmp_off > nmp->nm_maxfilesize || tmp_off < uio->uio_offset) {
mtx_unlock(&nmp->nm_mtx);
if (tmp_off > nmp->nm_maxfilesize || tmp_off < uio->uio_offset)
return (EFBIG);
}
mtx_unlock(&nmp->nm_mtx);
if (uio->uio_resid == 0)
return (0);