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| author | Steve French <stfrench@microsoft.com> | 2018-09-18 21:05:18 +0200 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2018-10-24 04:16:04 +0200 |
| commit | 00778e2294d560361e2ed4e94cc003351a2d82d9 (patch) | |
| tree | f0f9f7b0c1ea14705eb2fc183a6c053e553da8a3 /fs/cifs/cifsfs.c | |
| parent | cifs: minor updates to module description for cifs.ko (diff) | |
| download | linux-00778e2294d560361e2ed4e94cc003351a2d82d9.tar.xz linux-00778e2294d560361e2ed4e94cc003351a2d82d9.zip | |
smb3: add way to control slow response threshold for logging and stats
/proc/fs/cifs/Stats when CONFIG_CIFS_STATS2 is enabled logs 'slow'
responses, but depending on the server you are debugging a
one second timeout may be too fast, so allow setting it to
a larger number of seconds via new module parameter
/sys/module/cifs/parameters/slow_rsp_threshold
or via modprobe:
slow_rsp_threshold:Amount of time (in seconds) to wait before
logging that a response is delayed.
Default: 1 (if set to 0 disables msg). (uint)
Recommended values are 0 (disabled) to 32767 (9 hours) with
the default remaining as 1 second.
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Diffstat (limited to 'fs/cifs/cifsfs.c')
| -rw-r--r-- | fs/cifs/cifsfs.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index af6c2e1795ef..ba0054604f85 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -81,6 +81,14 @@ module_param(cifs_max_pending, uint, 0444); MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server for " "CIFS/SMB1 dialect (N/A for SMB3) " "Default: 32767 Range: 2 to 32767."); +#ifdef CONFIG_CIFS_STATS2 +unsigned int slow_rsp_threshold = 1; +module_param(slow_rsp_threshold, uint, 0644); +MODULE_PARM_DESC(slow_rsp_threshold, "Amount of time (in seconds) to wait " + "before logging that a response is delayed. " + "Default: 1 (if set to 0 disables msg)."); +#endif /* STATS2 */ + module_param(enable_oplocks, bool, 0644); MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks. Default: y/Y/1"); @@ -1418,6 +1426,11 @@ init_cifs(void) #ifdef CONFIG_CIFS_STATS2 atomic_set(&totBufAllocCount, 0); atomic_set(&totSmBufAllocCount, 0); + if (slow_rsp_threshold < 1) + cifs_dbg(FYI, "slow_response_threshold msgs disabled\n"); + else if (slow_rsp_threshold > 32767) + cifs_dbg(VFS, + "slow response threshold set higher than recommended (0 to 32767)\n"); #endif /* CONFIG_CIFS_STATS2 */ atomic_set(&midCount, 0); |