leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

NFS: Avoid writeback threads getting stuck in mempool_alloc()

Browse Source 
In a low memory situation, allow the NFS writeback code to fail without
getting stuck in infinite loops in mempool_alloc().

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust
2022-03-21 13:48:36 -04:00
parent 515dcdcd48
commit 0bae835b63
2 changed files with 13 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
fs/nfs/write.c
View File

@@ -94,9 +94,15 @@ EXPORT_SYMBOL_GPL(nfs_commit_free);
static struct nfs_pgio_header *nfs_writehdr_alloc(void)
{
struct nfs_pgio_header *p = mempool_alloc(nfs_wdata_mempool, GFP_KERNEL);
struct nfs_pgio_header *p;
memset(p, 0, sizeof(*p));
p = kmem_cache_zalloc(nfs_wdata_cachep, nfs_io_gfp_mask());
if (!p) {
p = mempool_alloc(nfs_wdata_mempool, GFP_NOWAIT);
if (!p)
return NULL;
memset(p, 0, sizeof(*p));
}
p->rw_mode = FMODE_WRITE;
return p;
}