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server: Implement file access hints using posix_fadvise. 

Signed-off-by: Luke Deller <luke@deller.id.au>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Luke Deller 2021-08-20 21:12:53 +10:00 committed by Alexandre Julliard
parent 7d54682ffc
commit a87bafc5b9
4 changed files with 18 additions and 0 deletions
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1
configure vendored
View File

@ -18010,6 +18010,7 @@ for ac_func in \
pipe2 \ pipe2 \
poll \ poll \
port_create \ port_create \
posix_fadvise \
prctl \ prctl \
pread \ pread \
proc_pidinfo \ proc_pidinfo \

1
configure.ac
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@ -2186,6 +2186,7 @@ AC_CHECK_FUNCS(\
pipe2 \ pipe2 \
poll \ poll \
port_create \ port_create \
posix_fadvise \
prctl \ prctl \
pread \ pread \
proc_pidinfo \ proc_pidinfo \

3
include/config.h.in
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@ -513,6 +513,9 @@
/* Define to 1 if you have the <port.h> header file. */ /* Define to 1 if you have the <port.h> header file. */
#undef HAVE_PORT_H #undef HAVE_PORT_H
/* Define to 1 if you have the `posix_fadvise' function. */
#undef HAVE_POSIX_FADVISE
/* Define to 1 if you have the `prctl' function. */ /* Define to 1 if you have the `prctl' function. */
#undef HAVE_PRCTL #undef HAVE_PRCTL

13
server/fd.c
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@ -2026,6 +2026,19 @@ struct fd *open_fd( struct fd *root, const char *name, struct unicode_str nt_nam
free( closed_fd ); free( closed_fd );
fd->cacheable = 1; fd->cacheable = 1;
} }
#ifdef HAVE_POSIX_FADVISE
switch (options & (FILE_SEQUENTIAL_ONLY | FILE_RANDOM_ACCESS))
{
case FILE_SEQUENTIAL_ONLY:
posix_fadvise( fd->unix_fd, 0, 0, POSIX_FADV_SEQUENTIAL );
break;
case FILE_RANDOM_ACCESS:
posix_fadvise( fd->unix_fd, 0, 0, POSIX_FADV_RANDOM );
break;
}
#endif
if (root_fd != -1) fchdir( server_dir_fd ); /* go back to the server dir */ if (root_fd != -1) fchdir( server_dir_fd ); /* go back to the server dir */
return fd; return fd;