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| author | J. Bruce Fields <bfields@redhat.com> | 2017-09-20 03:51:31 +0300 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2017-10-04 23:25:01 +0300 |
| commit | 44d8660d3bb0a1c8363ebcb906af2343ea8e15f6 (patch) | |
| tree | ae880e4bda7d39b6e4162e05db962b59e85bedc3 | |
| parent | 9542446048e01871fd323cba9a1d468b46cfceea (diff) | |
| download | linux-44d8660d3bb0a1c8363ebcb906af2343ea8e15f6.tar.xz | |
nfsd: increase DRC cache limit
An NFSv4.1+ client negotiates the size of its duplicate reply cache size
in the initial CREATE_SESSION request. The server preallocates the
memory for the duplicate reply cache to ensure that we'll never fail to
record the response to a nonidempotent operation.
To prevent a few CREATE_SESSIONs from consuming all of memory we set an
upper limit based on nr_free_buffer_pages(). 1/2^10 has been too
limiting in practice; 1/2^7 is still less than one percent.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| -rw-r--r-- | fs/nfsd/nfssvc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c index 7e3af3ef0917..6bbc717f40f2 100644 --- a/fs/nfsd/nfssvc.c +++ b/fs/nfsd/nfssvc.c @@ -446,7 +446,7 @@ void nfsd_reset_versions(void) */ static void set_max_drc(void) { - #define NFSD_DRC_SIZE_SHIFT 10 + #define NFSD_DRC_SIZE_SHIFT 7 nfsd_drc_max_mem = (nr_free_buffer_pages() >> NFSD_DRC_SIZE_SHIFT) * PAGE_SIZE; nfsd_drc_mem_used = 0; |