Merge pull request #7349 from yuyuyu101/add-pwritev

osd: FileStore: use pwritev instead of lseek+writev

Reviewed-by: Kefu Chai <kchai@redhat.com>
Reviewed-by: Sage Weil <sage@redhat.com>

diff --cc CMakeLists.txt
index 096985e30ae78c49d58aae7d76c019d03a8f14d4,8b8dbed8f66d2a76aae259a64cfa578cdbd7726a..506d59c826f284708597205c6f0af7dd35ef5e48
--- 1/CMakeLists.txt
--- 2/CMakeLists.txt
+++ b/CMakeLists.txt
@@@ -42,9 -30,10 +42,10 @@@ include(CheckFunctionExists
  CHECK_FUNCTION_EXISTS(fallocate CEPH_HAVE_FALLOCATE)
  CHECK_FUNCTION_EXISTS(posix_fadvise HAVE_POSIX_FADVISE)
  CHECK_FUNCTION_EXISTS(posix_fallocate HAVE_POSIX_FALLOCATE)
 -CHECK_FUNCTION_EXISTS(syncfs HAVE_SYS_SYNCFS) 
 +CHECK_FUNCTION_EXISTS(syncfs HAVE_SYS_SYNCFS)
  CHECK_FUNCTION_EXISTS(sync_file_range HAVE_SYNC_FILE_RANGE)
  CHECK_FUNCTION_EXISTS(mallinfo HAVE_MALLINFO)
+ CHECK_FUNCTION_EXISTS(pwritev HAVE_PWRITEV)
  CHECK_INCLUDE_FILES("arpa/inet.h" HAVE_ARPA_INET_H)
  CHECK_INCLUDE_FILES("boost/random/discrete_distribution.hpp" HAVE_BOOST_RANDOM_DISCRETE_DISTRIBUTION)
  CHECK_INCLUDE_FILES("dirent.h" HAVE_DIRENT_H)

diff --cc configure.ac
Simple merge

diff --cc src/common/buffer.cc
Simple merge

diff --cc src/include/buffer.h
Simple merge

diff --cc src/include/config-h.in.cmake
Simple merge

diff --cc src/os/filestore/FileStore.cc
Simple merge

diff --cc src/test/bufferlist.cc
Simple merge