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allow setting of 'max_pages' (via 'fuse_msg_size')

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Linux 4.20 and above allow setting the number of pages per FUSE message
upto 256 (4K * 256 = 1MiB). This can greatly increase read and write
speeds depending on the workload.
This commit is contained in:
Antonio SJ Musumeci 2019-05-30 18:59:18 -04:00
parent 24af276542
commit 7cbd88ac81
14 changed files with 345 additions and 210 deletions
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17
src/fuse_init.cpp
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@ -60,6 +60,22 @@ namespace l
*want_ = false;
}
static
void
want_if_capable_max_pages(fuse_conn_info *conn_,
Config &c_)
{
if(l::capable(conn_,FUSE_CAP_MAX_PAGES))
{
l::want(conn_,FUSE_CAP_MAX_PAGES);
conn_->max_pages = c_.fuse_msg_size;
}
else
{
c_.fuse_msg_size = FUSE_DEFAULT_MAX_PAGES_PER_REQ;
}
}
}
namespace FUSE
@ -80,6 +96,7 @@ namespace FUSE
l::want_if_capable(conn_,FUSE_CAP_IOCTL_DIR);
l::want_if_capable(conn_,FUSE_CAP_PARALLEL_DIROPS);
l::want_if_capable(conn_,FUSE_CAP_POSIX_ACL,&c.posix_acl);
l::want_if_capable_max_pages(conn_,c);
return &c;
}